Major GUI workover. Hilights: A new filebrowser and new knob widget.

30 files changed, 1231 insertions, 110 deletions

diff --git a/hugin b/hugin
-Subproject 782fe184b558070bca926bdeb38c48ea1657854
+Subproject caec7b4431a524c84fbf724ffbf9c888c650399
diff --git a/plugingui/Makefile.am.plugingui b/plugingui/Makefile.am.plugingui
index 4755ebd..6ce79fc 100644
--- a/plugingui/Makefile.am.plugingui
+++ b/plugingui/Makefile.am.plugingui
@@ -18,7 +18,10 @@ PLUGIN_GUI_SOURCES = \
 	$(top_srcdir)/plugingui/lineedit.cc \
 	$(top_srcdir)/plugingui/led.cc \
 	$(top_srcdir)/plugingui/checkbox.cc \
-	$(top_srcdir)/plugingui/slider.cc
+	$(top_srcdir)/plugingui/slider.cc \
+	$(top_srcdir)/plugingui/listbox.cc \
+	$(top_srcdir)/plugingui/knob.cc \
+	$(top_srcdir)/plugingui/filebrowser.cc
 
 PLUGIN_GUI_LIBS = -lX11
 
diff --git a/plugingui/Makefile.mingw32 b/plugingui/Makefile.mingw32
index 83f4f04..08e772e 100644
--- a/plugingui/Makefile.mingw32
+++ b/plugingui/Makefile.mingw32
@@ -29,6 +29,9 @@ CXX_SOURCES = \
 	$(top_srcdir)/plugingui/led.cc \
 	$(top_srcdir)/plugingui/checkbox.cc \
 	$(top_srcdir)/plugingui/slider.cc \
+	$(top_srcdir)/plugingui/listbox.cc \
+	$(top_srcdir)/plugingui/filebrowser.cc \
+	$(top_srcdir)/plugingui/knob.cc \
 	$(top_srcdir)/src/thread.cc
 
 OBJECTS=$(CXX_SOURCES:.cc=.o) $(C_SOURCES:.c=.o)
diff --git a/plugingui/eventhandler.cc b/plugingui/eventhandler.cc
index fdef990..3570b77 100644
--- a/plugingui/eventhandler.cc
+++ b/plugingui/eventhandler.cc
@@ -37,6 +37,7 @@
 GUI::EventHandler::EventHandler(GlobalContext *gctx)
 {
   this->gctx = gctx;
+  last_click = 0;
 #ifdef WIN32
   this->gctx->eventhandler = this;
   event = NULL;
@@ -66,7 +67,6 @@ LRESULT CALLBACK dialogProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
   GUI::EventHandler *handler =
     (GUI::EventHandler *) GetWindowLong(hwnd, GWL_USERDATA);
 
-
 	switch(msg) {
 	case WM_SIZE:
     {
@@ -142,6 +142,8 @@ LRESULT CALLBACK dialogProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
     //		fwKeys = wp;
 		break;
 
+	case WM_LBUTTONDBLCLK:
+    printf("LBUTTONDBLCLK\n");
 	case WM_LBUTTONDOWN:
     {
       GUI::ButtonEvent *e = new GUI::ButtonEvent();
@@ -149,6 +151,7 @@ LRESULT CALLBACK dialogProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
       e->y = (int)(short) HIWORD(lp);
       e->button = 0;
       e->direction = 1;
+      e->doubleclick = (msg == WM_LBUTTONDBLCLK);
       handler->event = e;
     }
     //xPos = (int)(short) LOWORD(lp);
@@ -157,18 +160,29 @@ LRESULT CALLBACK dialogProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
 		break;
 
 	case WM_MBUTTONUP:
+    {
+      GUI::ButtonEvent *e = new GUI::ButtonEvent();
+      e->x = (int)(short) LOWORD(lp);
+      e->y = (int)(short) HIWORD(lp);
+      e->button = 3;
+      e->direction = -1;
+      e->doubleclick = 0;
+      handler->event = e;
+    }
 		//xPos = (int)(short) LOWORD(lp);
 		//yPos = (int)(short) HIWORD(lp);
 		//fwKeys = wp;
 		break;
 
+  case WM_MBUTTONDBLCLK:
 	case WM_MBUTTONDOWN:
     {
       GUI::ButtonEvent *e = new GUI::ButtonEvent();
       e->x = (int)(short) LOWORD(lp);
       e->y = (int)(short) HIWORD(lp);
-      e->button = 1;
+      e->button = 3;
       e->direction = 1;
+      e->doubleclick = (msg == WM_MBUTTONDBLCLK);
       handler->event = e;
     }
     //		xPos = (int)(short) LOWORD(lp);
@@ -183,6 +197,7 @@ LRESULT CALLBACK dialogProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
       e->y = (int)(short) HIWORD(lp);
       e->button = 1;
       e->direction = -1;
+      e->doubleclick = 0;
       handler->event = e;
     }
     //		xPos = (int)(short) LOWORD(lp);
@@ -190,6 +205,7 @@ LRESULT CALLBACK dialogProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
     //		fwKeys = wp;
 		break;
 
+  case WM_RBUTTONDBLCLK:
 	case WM_RBUTTONDOWN:
     {
       GUI::ButtonEvent *e = new GUI::ButtonEvent();
@@ -197,6 +213,7 @@ LRESULT CALLBACK dialogProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
       e->y = (int)(short) HIWORD(lp);
       e->button = 1;
       e->direction = 1;
+      e->doubleclick = (msg == WM_RBUTTONDBLCLK);
       handler->event = e;
     }
     //		xPos = (int)(short) LOWORD(lp);
@@ -469,6 +486,10 @@ GUI::Event *GUI::EventHandler::getNextEvent()
     e->y = xe.xbutton.y;
     e->button = 0;
     e->direction = xe.type == ButtonPress?1:-1;
+    e->doubleclick =
+      xe.type == ButtonPress && (xe.xbutton.time - last_click) < 200;
+
+    if(xe.type == ButtonPress) last_click = xe.xbutton.time;
     event = e;
   }
 
@@ -542,14 +563,16 @@ void GUI::EventHandler::processEvents(Window *window)
       //      window->repaint((RepaintEvent*)event);
       window->redraw();
       break;
-    case Event::Resize:{
-      //      window->repaint((RepaintEvent*)event)
-      ResizeEvent *re = (ResizeEvent*)event;
-      if(re->width != window->width() || re->height != window->height()) {
-        window->resized(re->width, re->height);
-        window->repaint_r(NULL);
+    case Event::Resize:
+      {
+        //      window->repaint((RepaintEvent*)event)
+        ResizeEvent *re = (ResizeEvent*)event;
+        if(re->width != window->width() || re->height != window->height()) {
+          window->resized(re->width, re->height);
+          window->repaint_r(NULL);
+        }
       }
-    }      break;
+      break;
     case Event::MouseMove:
       {
         MouseMoveEvent *me = (MouseMoveEvent*)event;
@@ -558,21 +581,22 @@ void GUI::EventHandler::processEvents(Window *window)
 
         if(window->buttonDownFocus()) {
           Widget *w = window->buttonDownFocus();
+          /*
           if(me->x < w->x()) me->x = w->x();
           if(me->x > w->x() + w->width()) me->x = w->x() + w->width();
           if(me->y < w->y()) me->y = w->y();
           if(me->y > w->y() + w->height()) me->y = w->y() + w->height();
-
-          me->x -= w->x();
-          me->y -= w->y();
+          */
+          me->x -= w->windowX();
+          me->y -= w->windowY();
 
           window->buttonDownFocus()->mouseMoveEvent(me);
           break;
         }
 
         if(w) {
-          me->x -= w->x();
-          me->y -= w->y();
+          me->x -= w->windowX();
+          me->y -= w->windowY();
           w->mouseMoveEvent(me);
         }
       }
@@ -586,13 +610,14 @@ void GUI::EventHandler::processEvents(Window *window)
         if(window->buttonDownFocus()) {
           if(be->direction == -1) {
             Widget *w = window->buttonDownFocus();
+            /*
             if(be->x < w->x()) be->x = w->x();
             if(be->x > w->x() + w->width()) be->x = w->x() + w->width();
             if(be->y < w->y()) be->y = w->y();
             if(be->y > w->y() + w->height()) be->y = w->y() + w->height();
-            
-            be->x -= w->x();
-            be->y -= w->y();
+            */
+            be->x -= w->windowX();
+            be->y -= w->windowY();
 
             w->buttonEvent(be);
             break;
@@ -602,8 +627,8 @@ void GUI::EventHandler::processEvents(Window *window)
         }
 
         if(w) {
-          be->x -= w->x();
-          be->y -= w->y();
+          be->x -= w->windowX();
+          be->y -= w->windowY();
 
           w->buttonEvent(be);
 
diff --git a/plugingui/eventhandler.h b/plugingui/eventhandler.h
index c63c003..99be2d4 100644
--- a/plugingui/eventhandler.h
+++ b/plugingui/eventhandler.h
@@ -52,7 +52,7 @@ public:
   GlobalContext *gctx;
 
 private:
-
+  int last_click;
   void (*closeHandler)(void *);
   void *closeHandlerPtr;
 };
diff --git a/plugingui/filebrowser.cc b/plugingui/filebrowser.cc
new file mode 100644
index 0000000..6582202
--- /dev/null
+++ b/plugingui/filebrowser.cc
@@ -0,0 +1,151 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            filebrowser.cc
+ *
+ *  Mon Feb 25 21:09:44 CET 2013
+ *  Copyright 2013 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "filebrowser.h"
+
+#include "painter.h"
+
+#include "button.h"
+#include "listbox.h"
+
+#include <sys/types.h>
+#include <dirent.h>
+#include <stdio.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+struct GUI::FileBrowser::private_data {
+  GUI::ListBox *listbox;
+  void (*filesel_handler)(void *, std::string);
+  void *ptr;
+};
+
+void changeDir(void *ptr)
+{
+  struct GUI::FileBrowser::private_data *prv =
+    (struct GUI::FileBrowser::private_data *)ptr;
+
+  GUI::ListBox *lb = prv->listbox;
+  std::string value = lb->selectedValue();
+
+  char filename[1024];
+  char *c = getcwd(filename, sizeof(filename));
+  (void)c;
+  strcat(filename, "/");
+  strcat(filename, value.c_str());
+
+  struct stat st;
+  if(stat(filename, &st) == 0) {
+    if((st.st_mode & S_IFDIR) != 0) {
+      //printf("'%s' is present and is a directory\n", filename);
+    }
+    if((st.st_mode & S_IFREG) != 0) {
+      //printf("'%s' is present and is a file\n", filename);
+      if(prv->filesel_handler) prv->filesel_handler(prv->ptr, filename);
+      return;
+    }
+  } else {
+    //printf("'%s' is not present or unreadable\n", filename);
+    return;
+  }
+
+  lb->clear();
+  int i = chdir(value.c_str());
+  (void)i;
+  DIR *dir = opendir(".");
+
+  struct dirent *entry;
+  while((entry = readdir(dir)) != NULL) {
+    lb->addItem(entry->d_name, entry->d_name);
+  }
+
+  closedir(dir);
+}
+
+GUI::FileBrowser::FileBrowser(GUI::Widget *parent)
+  : GUI::Widget(parent)
+{
+  prv = new struct GUI::FileBrowser::private_data();
+  prv->filesel_handler = NULL;
+
+#define brd 5 // border
+#define btn_h 12
+
+  listbox = new GUI::ListBox(this);
+  listbox->registerDblClickHandler(changeDir, prv);
+  prv->listbox = listbox;
+
+  btn = new GUI::Button(this);
+  btn->setText("Select");
+  btn->registerClickHandler(changeDir, prv);
+
+  changeDir(prv);
+
+  resize(200, 190);
+}
+
+GUI::FileBrowser::~FileBrowser()
+{
+  delete prv->listbox;
+  delete prv;
+}
+
+void GUI::FileBrowser::resize(size_t w, size_t h)
+{
+  GUI::Widget::resize(w,h);
+
+  listbox->move(brd, brd);
+  listbox->resize(w - 1 - 2*brd, h - btn_h -  3*brd);
+
+  btn->move(brd, h - btn_h - brd);
+  btn->resize(w - 1 - 2*brd, btn_h);
+}
+
+
+void GUI::FileBrowser::registerFileSelectHandler(void (*handler)(void *,
+                                                        std::string),
+                                                 void *ptr)
+{
+  prv->filesel_handler = handler;
+  prv->ptr = ptr;
+}
+
+void GUI::FileBrowser::repaintEvent(GUI::RepaintEvent *e)
+{
+  Painter p(this);
+  p.setColour(Colour(0, 0.8));
+
+  p.drawFilledRectangle(0, 0, width(), height());
+
+  p.setColour(Colour(1, 1));
+
+  for(int i = 1; i < 10; i++) {
+    p.drawLine(0,0,width() / i, height() - 1);
+    p.drawLine(width()-1,0,width() / i, height() - 1);
+  }
+}
diff --git a/plugingui/filebrowser.h b/plugingui/filebrowser.h
new file mode 100644
index 0000000..bdfe98f
--- /dev/null
+++ b/plugingui/filebrowser.h
@@ -0,0 +1,62 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            filebrowser.h
+ *
+ *  Mon Feb 25 21:09:43 CET 2013
+ *  Copyright 2013 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#ifndef __DRUMGIZMO_FILEBROWSER_H__
+#define __DRUMGIZMO_FILEBROWSER_H__
+
+#include "widget.h"
+
+#include "button.h"
+#include "listbox.h"
+
+namespace GUI {
+
+class FileBrowser : public Widget {
+public:
+  struct private_data;
+
+  FileBrowser(Widget *parent);
+  ~FileBrowser();
+
+  bool isFocusable() { return true; }
+
+  void registerFileSelectHandler(void (*handler)(void *, std::string),
+                                 void *ptr);
+
+  virtual void repaintEvent(RepaintEvent *e);
+
+  virtual void resize(size_t w, size_t h);
+
+private:
+  struct private_data *prv;
+
+  GUI::ListBox *listbox;
+  GUI::Button *btn;
+};
+
+};
+
+#endif/*__DRUMGIZMO_FILEBROWSER_H__*/
diff --git a/plugingui/font.h b/plugingui/font.h
index c83a98f..848b168 100644
--- a/plugingui/font.h
+++ b/plugingui/font.h
@@ -46,7 +46,7 @@ public:
   size_t size();
 
   size_t textWidth(std::string text);
-  size_t textHeight(std::string text);
+  size_t textHeight(std::string text = "");
 
   PixelBufferAlpha *render(GlobalContext *gctx, std::string text);
 
diff --git a/plugingui/guievent.h b/plugingui/guievent.h
index 0fb3ef2..d8d6955 100644
--- a/plugingui/guievent.h
+++ b/plugingui/guievent.h
@@ -61,27 +61,28 @@ class MouseMoveEvent : public Event {
 public:
   Type type() { return MouseMove; }
 
-  size_t x;
-  size_t y;
+  int x;
+  int y;
 };
 
 class ButtonEvent : public Event {
 public:
   Type type() { return Button; }
 
-  size_t x;
-  size_t y;
+  int x;
+  int y;
 
   int direction;
   int button;
+  int doubleclick;
 };
 
 class RepaintEvent : public Event {
 public:
   Type type() { return Repaint; }
 
-  size_t x;
-  size_t y;
+  int x;
+  int y;
   size_t width;
   size_t height;
 };
diff --git a/plugingui/knob.cc b/plugingui/knob.cc
new file mode 100644
index 0000000..75a7278
--- /dev/null
+++ b/plugingui/knob.cc
@@ -0,0 +1,167 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            knob.cc
+ *
+ *  Thu Feb 28 07:37:27 CET 2013
+ *  Copyright 2013 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "knob.h"
+
+#include "painter.h"
+
+#include <hugin.hpp>
+#include <stdio.h>
+#include <math.h>
+
+GUI::Knob::Knob(Widget *parent)
+  : GUI::Widget(parent)
+{
+  state = up;
+
+  val = 0.0;
+  maximum = 1.0;
+  minimum = 0.0;
+  mouse_offset_x = 0;
+
+  handler = NULL;
+  ptr = NULL;
+}
+
+void GUI::Knob::setValue(float v)
+{
+  val = v;
+  if(handler) handler(ptr);
+  repaintEvent(NULL);
+}
+
+float GUI::Knob::value()
+{
+  return val;
+}
+
+void GUI::Knob::registerClickHandler(void (*handler)(void *), void *ptr)
+{
+  this->handler = handler;
+  this->ptr = ptr;
+}
+
+void GUI::Knob::mouseMoveEvent(MouseMoveEvent *e)
+{
+  if(state == down) {
+    /*
+    DEBUG(slider, "Knob::mouseMoveEvent(mouse_offset_x: %d,  e->x: %d)\n",
+          mouse_offset_x, e->x);
+    */
+    if(mouse_offset_x == (e->x + -1*e->y)) return;
+
+    float dval = mouse_offset_x - (e->x + -1*e->y);
+    val -= dval / 300.0;
+
+    if(val < 0) val = 0;
+    if(val > 1) val = 1;
+
+    if(handler) handler(ptr);
+    repaintEvent(NULL);
+
+    mouse_offset_x = e->x + -1*e->y;
+  }
+}
+
+void GUI::Knob::buttonEvent(ButtonEvent *e)
+{
+  if(e->direction == 1) {
+    state = down;
+    mouse_offset_x = e->x + -1*e->y;
+    //val = maximum / (float)width() * (float)e->x;
+    if(handler) handler(ptr);
+    repaintEvent(NULL);
+  }
+  if(e->direction == -1) {
+    state = up;
+    mouse_offset_x = e->x + -1*e->y;
+    //val = maximum / (float)width() * (float)e->x;
+    repaintEvent(NULL);
+    clicked();
+    if(handler) handler(ptr);
+  }
+}
+
+void GUI::Knob::repaintEvent(GUI::RepaintEvent *e)
+{
+  //  DEBUG(slider, "Knob::repaintEvent (%f)\n", val);
+
+  Painter p(this);
+
+  float alpha = 0.8;
+
+  p.setColour(Colour(0, 0));
+  p.drawFilledRectangle(0,0,width()-1,height()-1);
+
+  if(hasKeyboardFocus()) {
+    p.setColour(Colour(0.6, alpha));
+  } else {
+    p.setColour(Colour(0.5, alpha));
+  }
+  
+  int radius = (width()>height()?height():width()) / 2;
+  int center_x = width() / 2;
+  int center_y = height() / 2;
+
+  p.setColour(Colour(1, alpha));
+
+  char buf[64];
+  sprintf(buf, "%.2f", val * maximum);
+  Font font;
+  p.drawText(center_x - font.textWidth(buf) / 2,
+             center_y + font.textHeight(buf) / 2, font, buf);
+
+  p.setColour(Colour(0.5, 0.5, 1, alpha));
+
+  p.drawCircle(center_x, center_y, radius);
+
+  double padval = val * 0.8 + 0.1;
+  double border_x = sin((-1 * padval + 1) * 2 * M_PI);
+  double border_y = cos((-1 * padval + 1) * 2 * M_PI);
+
+  p.setColour(Colour(1, 0, 0, alpha));
+  p.drawLine(border_x * (radius / 2) + center_x,
+             border_y * (radius / 2) + center_y,
+             border_x * radius + center_x,
+             border_y * radius + center_y);
+}
+
+#ifdef TEST_KNOB
+//Additional dependency files
+//deps:
+//Required cflags (autoconf vars may be used)
+//cflags:
+//Required link options (autoconf vars may be used)
+//libs:
+#include "test.h"
+
+TEST_BEGIN;
+
+// TODO: Put some testcode here (see test.h for usable macros).
+
+TEST_END;
+
+#endif/*TEST_KNOB*/
diff --git a/plugingui/knob.h b/plugingui/knob.h
new file mode 100644
index 0000000..98ccf36
--- /dev/null
+++ b/plugingui/knob.h
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            knob.h
+ *
+ *  Thu Feb 28 07:37:27 CET 2013
+ *  Copyright 2013 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#ifndef __DRUMGIZMO_KNOB_H__
+#define __DRUMGIZMO_KNOB_H__
+
+#include "widget.h"
+
+namespace GUI {
+
+class Knob : public Widget {
+public:
+  Knob(Widget *parent);
+
+  bool catchMouse() { return true; }
+
+  void setValue(float value);
+  float value();
+
+  void registerClickHandler(void (*handler)(void *), void *ptr);
+
+  //protected:
+  virtual void clicked() {}
+
+  virtual void repaintEvent(RepaintEvent *e);
+  virtual void buttonEvent(ButtonEvent *e);
+  virtual void mouseMoveEvent(MouseMoveEvent *e);
+
+private:
+  typedef enum {
+    up,
+    down
+  } state_t;
+
+  float val;
+  float maximum;
+  float minimum;
+
+  state_t state;
+
+  void (*handler)(void *);
+  void *ptr;
+
+  int mouse_offset_x;
+
+};
+
+};
+
+#endif/*__DRUMGIZMO_KNOB_H__*/
diff --git a/plugingui/lineedit.cc b/plugingui/lineedit.cc
index 033acd1..c799e32 100644
--- a/plugingui/lineedit.cc
+++ b/plugingui/lineedit.cc
@@ -43,6 +43,7 @@ GUI::LineEdit::LineEdit(Widget *parent)
 void GUI::LineEdit::setText(std::string text)
 {
   _text = text;
+  repaintEvent(NULL);
   textChanged();
 }
 
diff --git a/plugingui/listbox.cc b/plugingui/listbox.cc
new file mode 100644
index 0000000..dfb5f07
--- /dev/null
+++ b/plugingui/listbox.cc
@@ -0,0 +1,170 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            listbox.cc
+ *
+ *  Mon Feb 25 21:21:41 CET 2013
+ *  Copyright 2013 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "listbox.h"
+
+#include "painter.h"
+#include "font.h"
+
+#include <stdio.h>
+
+GUI::ListBox::ListBox(GUI::Widget *parent)
+  : GUI::Widget(parent)
+{
+  padding = 4;
+  btn_size = 14;
+
+  scroll_offset = 0;
+  selected = "";
+
+  dblclk_handler = NULL;
+  ptr = NULL;
+}
+
+GUI::ListBox::~ListBox()
+{
+  // printf("ListBox destroy\n");
+}
+
+void GUI::ListBox::addItem(std::string name, std::string value)
+{
+  items[name] = value;
+  if(selected == "") selected = value;
+}
+
+void GUI::ListBox::clear()
+{
+  items.clear();
+  selected = "";
+  scroll_offset = 0;
+  repaintEvent(NULL);
+}
+
+bool GUI::ListBox::selectItem(std::string name)
+{
+  if(items.find(name) == items.end()) return false;
+  selected = items[name];
+  repaintEvent(NULL);
+  return true;
+}
+
+std::string GUI::ListBox::selectedName()
+{
+  return selected;
+}
+
+std::string GUI::ListBox::selectedValue()
+{
+  return items[selected];
+}
+
+void GUI::ListBox::registerDblClickHandler(void (*handler)(void *), void *ptr)
+{
+  this->dblclk_handler = handler;
+  this->ptr = ptr;
+}
+
+void GUI::ListBox::repaintEvent(GUI::RepaintEvent *e)
+{
+  GUI::Painter p(this);
+
+  p.setColour(Colour(0, 0.5));
+  p.drawFilledRectangle(0, 0, width() - 1, height() - 1);
+
+  p.setColour(Colour(0.5, 1));
+  p.drawRectangle(0, 0, width() - 1, height() - 1);
+
+  int yoffset = padding / 2;
+  int skip = scroll_offset;
+  std::map<std::string, std::string>::iterator i = items.begin();
+  while(i != items.end()) {
+    if(skip) {
+      skip--;
+      i++;
+      continue;
+    }
+    if(i->second == selected) {
+      p.setColour(Colour(1, 0.4));
+      p.drawFilledRectangle(1,
+                            yoffset - (padding / 2),
+                            width() - 1,
+                            yoffset + (font.textHeight() + 1));
+    }
+
+    p.setColour(Colour(1, 1));
+    p.drawText(2, yoffset + font.textHeight(), font, i->first);
+    yoffset += font.textHeight() + padding;
+    i++;
+  }
+
+  p.drawRectangle(width() - btn_size, 0, width() - 1, btn_size);
+  p.drawRectangle(width() - btn_size, height() - btn_size,
+                  width() - 1, height() - 1);
+}
+
+void GUI::ListBox::buttonEvent(ButtonEvent *e)
+{
+  //printf("click %d %d [dc: %d]\n", e->x, e->y, e->doubleclick);
+  if(e->direction == 1) {
+    if(e->x > (width() - btn_size) && e->y < (width() - 1)) {
+      if(e->y > 0 && e->y < btn_size) {
+        scroll_offset--;
+        if(scroll_offset < 0) scroll_offset = 0;
+        repaintEvent(NULL);
+        return;
+      }
+
+      if(e->y > (height() - btn_size) && e->y < (height() - 1)) {
+        scroll_offset++;
+        if(scroll_offset > (items.size() - 1))
+          scroll_offset = (items.size() - 1);
+        repaintEvent(NULL);
+        return;
+      }
+    }
+
+    int skip = scroll_offset;
+    size_t yoffset = padding / 2;
+    std::map<std::string, std::string>::iterator i = items.begin();
+    while(i != items.end()) {
+      if(skip) {
+        skip--;
+        i++;
+        continue;
+      }
+      yoffset += font.textHeight() + padding;
+      if(e->y < (int)yoffset - (padding / 2)) {
+        selected = i->second;
+        break;
+      }
+      i++;
+    }
+
+    repaintEvent(NULL);
+
+    if(e->doubleclick && dblclk_handler) dblclk_handler(ptr);
+  }
+}
diff --git a/plugingui/listbox.h b/plugingui/listbox.h
new file mode 100644
index 0000000..2a8dc4f
--- /dev/null
+++ b/plugingui/listbox.h
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            listbox.h
+ *
+ *  Mon Feb 25 21:21:40 CET 2013
+ *  Copyright 2013 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#ifndef __DRUMGIZMO_LISTBOX_H__
+#define __DRUMGIZMO_LISTBOX_H__
+
+#include <string.h>
+#include <map>
+
+#include "widget.h"
+#include "font.h"
+
+namespace GUI {
+
+class ListBox : public Widget {
+public:
+  ListBox(Widget *parent);
+  ~ListBox();
+
+  bool isFocusable() { return true; }
+
+  void addItem(std::string name, std::string value);
+
+  void clear();
+  bool selectItem(std::string name);
+  std::string selectedName();
+  std::string selectedValue();
+
+  void registerDblClickHandler(void (*handler)(void *), void *ptr);
+
+  virtual void repaintEvent(RepaintEvent *e);
+  virtual void buttonEvent(ButtonEvent *e);
+
+private:
+  std::map<std::string, std::string> items;
+  std::string selected;
+  GUI::Font font;
+  int padding;
+  int btn_size;
+  int scroll_offset;
+
+  void (*dblclk_handler)(void *);
+  void *ptr;
+};
+
+};
+
+#endif/*__DRUMGIZMO_LISTBOX_H__*/
diff --git a/plugingui/nativewindow.h b/plugingui/nativewindow.h
index 9225f28..848a761 100644
--- a/plugingui/nativewindow.h
+++ b/plugingui/nativewindow.h
@@ -45,6 +45,7 @@ public:
   virtual void hide() = 0;
   virtual void handleBuffer() = 0;
   virtual void redraw() = 0;
+  virtual void grabMouse(bool grab) = 0;
 
 protected:
   GlobalContext *gctx;
diff --git a/plugingui/nativewindow_win32.cc b/plugingui/nativewindow_win32.cc
index a98ef4c..b1e22c5 100644
--- a/plugingui/nativewindow_win32.cc
+++ b/plugingui/nativewindow_win32.cc
@@ -52,7 +52,7 @@ GUI::NativeWindowWin32::NativeWindowWin32(GlobalContext *gctx,
   // object - we need this in the wndproc handler.
 	
 	wcex.cbSize = sizeof(WNDCLASSEX);
-	wcex.style = 0;//class_style;
+	wcex.style = CS_DBLCLKS;//class_style;
 	wcex.lpfnWndProc = (WNDPROC)dialogProc;
   wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
   // Set data:
@@ -131,4 +131,10 @@ void GUI::NativeWindowWin32::setCaption(const std::string &caption)
 {
 }
 
+void GUI::NativeWindowWin32::grabMouse(bool grab)
+{
+  if(grab) SetCapture(gctx->m_hwnd);
+  else ReleaseCapture();
+}
+
 #endif/*WIN32*/
diff --git a/plugingui/nativewindow_win32.h b/plugingui/nativewindow_win32.h
index 6039439..cceff2f 100644
--- a/plugingui/nativewindow_win32.h
+++ b/plugingui/nativewindow_win32.h
@@ -46,6 +46,7 @@ public:
   void hide();
   void handleBuffer();
   void redraw();
+  void grabMouse(bool grab);
 
 private:
   GUI::Window *window;
diff --git a/plugingui/nativewindow_x11.cc b/plugingui/nativewindow_x11.cc
index 91d7ed6..c7605ef 100644
--- a/plugingui/nativewindow_x11.cc
+++ b/plugingui/nativewindow_x11.cc
@@ -229,5 +229,11 @@ void GUI::NativeWindowX11::setCaption(const std::string &caption)
 {
 }
 
+void GUI::NativeWindowX11::grabMouse(bool grab)
+{
+  (void)grab;
+  // Don't need to do anything on this platoform...
+}
+
 #endif/*X11*/
 
diff --git a/plugingui/nativewindow_x11.h b/plugingui/nativewindow_x11.h
index 2e51861..0cd11da 100644
--- a/plugingui/nativewindow_x11.h
+++ b/plugingui/nativewindow_x11.h
@@ -48,6 +48,7 @@ public:
   void hide();
   void handleBuffer();
   void redraw();
+  void grabMouse(bool grab);
 
 private:
   ::Window xwindow;
diff --git a/plugingui/painter.cc b/plugingui/painter.cc
index 025363c..b74952f 100644
--- a/plugingui/painter.cc
+++ b/plugingui/painter.cc
@@ -49,6 +49,107 @@ void GUI::Painter::setColour(Colour colour)
   this->colour = colour;
 }
 
+void GUI::Painter::plot(int x, int y, double c)
+{
+  // plot the pixel at (x, y) with brightness c (where 0 ≤ c ≤ 1)
+
+  //c += 0.5;
+  //if(c > 1) c = 1;
+
+  pixbuf->addPixel(x, y,
+                   (unsigned char)(colour.red * 255.0),
+                   (unsigned char)(colour.green * 255.0),
+                   (unsigned char)(colour.blue * 255.0),
+                   (unsigned char)(colour.alpha * 255 * c));
+
+}
+
+#include <math.h>
+double GUI::Painter::ipart(double x)
+{
+  return floor(x); //integer part of x'
+}
+ 
+double GUI::Painter::round(double x)
+{
+  return ipart(x + 0.5);
+}
+ 
+double GUI::Painter::fpart(double x)
+{
+  return x - ipart(x);//'fractional part of x'
+}
+ 
+double GUI::Painter::rfpart(double x)
+{
+  return 1 - fpart(x);
+}
+
+
+#define SWAP(x, y) { int tmp = x; x = y; y = tmp; }
+void GUI::Painter::drawLine(int x0, int y0, int x1, int y1)
+{
+  bool steep = abs(y1 - y0) > abs(x1 - x0);
+ 
+  if(steep) {
+    SWAP(x0, y0);
+    SWAP(x1, y1);
+  }
+  if(x0 > x1) {
+    SWAP(x0, x1);
+    SWAP(y0, y1);
+  }
+ 
+  double dx = x1 - x0;
+  double dy = y1 - y0;
+  double gradient = dy / dx;
+ 
+  // handle first endpoint
+  double xend = round(x0);
+  double yend = y0 + gradient * (xend - x0);
+  double xgap = rfpart(x0 + 0.5);
+  double xpxl1 = xend;   //this will be used in the main loop
+  double ypxl1 = ipart(yend);
+  if(steep) {
+    plot(ypxl1,   xpxl1, rfpart(yend) * xgap);
+    plot(ypxl1+1, xpxl1,  fpart(yend) * xgap);
+  } else {
+    plot(xpxl1, ypxl1  , rfpart(yend) * xgap);
+    plot(xpxl1, ypxl1+1,  fpart(yend) * xgap);
+  }
+  double intery = yend + gradient; // first y-intersection for the main loop
+ 
+  // handle second endpoint
+ 
+  xend = round(x1);
+  yend = y1 + gradient * (xend - x1);
+  xgap = fpart(x1 + 0.5);
+  double xpxl2 = xend; //this will be used in the main loop
+  double ypxl2 = ipart(yend);
+  if(steep) {
+    plot(ypxl2  , xpxl2, rfpart(yend) * xgap);
+    plot(ypxl2+1, xpxl2,  fpart(yend) * xgap);
+  } else {
+    plot(xpxl2, ypxl2,  rfpart(yend) * xgap);
+    plot(xpxl2, ypxl2+1, fpart(yend) * xgap);
+  }
+ 
+  // main loop
+  for(int x = xpxl1 + 1; x <= xpxl2 - 1; x++) {
+    if(steep) {
+      plot(ipart(intery)  , x, rfpart(intery));
+      plot(ipart(intery)+1, x,  fpart(intery));
+    } else {
+      plot(x, ipart (intery),  rfpart(intery));
+      plot(x, ipart (intery)+1, fpart(intery));
+    }
+    intery += gradient;
+  }
+}
+/////////////////////////////////////////////
+
+/*
+// No antialiasing
 void GUI::Painter::drawLine(int x0, int y0, int x1, int y1)
 {
   int dx = abs(x1 - x0);
@@ -78,6 +179,7 @@ void GUI::Painter::drawLine(int x0, int y0, int x1, int y1)
     }
   }
 }
+*/
 
 void GUI::Painter::drawRectangle(int x1, int y1, int x2, int y2)
 {
@@ -123,6 +225,80 @@ void GUI::Painter::drawPoint(int x, int y)
                    (unsigned char)(colour.alpha * 255.0));
 }
 
+#if 0
+static double distance(double r, double y)
+{
+  double real_point = sqrt(pow(r, 2) - pow(y, 2));
+  return ceil(real_point) - real_point;
+}
+
+double new_color(double i) {
+ return i * 127;
+}
+
+void GUI::Painter::drawCircle(int cx, int cy, double radius)
+{
+  // wu_circle($image, $r, $color, $offset_x = null, $offset_y = null) {
+  //$red = $color["red"];
+  //$green = $color["green"];
+  //$blue = $color["blue"];
+  int offset_x = cx;
+  int offset_y = cy;
+  int x = radius;
+  //  int xx = radius;
+  int y = -1;
+  //  int yy = -1;
+  double t = 0;
+  //$color = imagecolorallocate($image, $red, $green, $blue);
+  while(x > y) {
+    y++;
+    double current_distance = distance(radius, y);
+    if(current_distance < t) {
+      x--;
+    }
+
+    double trasparency = new_color(current_distance);
+    double alpha = trasparency;
+    double alpha2 = 127.0 - trasparency;
+
+    double color = 1;
+
+    plot(x + offset_x, y + offset_y, color);
+    plot(x + offset_x - 1, y + offset_y, alpha2 );
+    plot(x + offset_x + 1, y + offset_y, alpha );
+
+    plot(y + offset_x, x + offset_y, color);
+    plot(y + offset_x, x + offset_y - 1, alpha2);
+    plot(y + offset_x, x + offset_y + 1, alpha);
+
+    plot(offset_x - x , y + offset_y, color);
+    plot(offset_x - x + 1, y + offset_y, alpha2);
+    plot(offset_x - x - 1, y + offset_y, alpha);
+
+    plot(offset_x - y, x + offset_y, color);
+    plot(offset_x - y, x + offset_y - 1, alpha2);
+    plot(offset_x - y, x + offset_y + 1, alpha);
+
+    plot(x + offset_x, offset_y - y, color);
+    plot(x + offset_x - 1, offset_y - y, alpha2);
+    plot(x + offset_x + 1, offset_y - y, alpha);
+
+    plot(y + offset_x, offset_y - x, color);
+    plot(y + offset_x, offset_y - x - 1, alpha);
+    plot(y + offset_x, offset_y - x + 1, alpha2);
+
+    plot(offset_x - y, offset_y - x, color);
+    plot(offset_x - y, offset_y - x - 1, alpha);
+    plot(offset_x - y, offset_y - x + 1, alpha2);
+
+    plot(offset_x - x, offset_y - y, color);
+    plot(offset_x - x - 1, offset_y - y, alpha);
+    plot(offset_x - x + 1, offset_y - y, alpha2);
+
+    t = current_distance;
+  }
+}
+#else
 static void plot4points(GUI::Painter *p, int cx, int cy, int x, int y)
 {
   p->drawPoint(cx + x, cy + y);
@@ -131,7 +307,7 @@ static void plot4points(GUI::Painter *p, int cx, int cy, int x, int y)
   if(x != 0 && y != 0) p->drawPoint(cx - x, cy - y);
 }
 
-void GUI::Painter::drawCircle(int cx, int cy, int radius)
+void GUI::Painter::drawCircle(int cx, int cy, double radius)
 {
   int error = -radius;
   int x = radius;
@@ -152,6 +328,7 @@ void GUI::Painter::drawCircle(int cx, int cy, int radius)
     }
   }
 }
+#endif
 
 static void plot4lines(GUI::Painter *p, int cx, int cy, int x, int y)
 {
diff --git a/plugingui/painter.h b/plugingui/painter.h
index c9fd60d..b45cf3a 100644
--- a/plugingui/painter.h
+++ b/plugingui/painter.h
@@ -64,11 +64,17 @@ public:
   void drawRectangle(int x1, int y1, int x2, int y2);
   void drawFilledRectangle(int x1, int y1, int x2, int y2);
   void drawPoint(int x, int y);
-  void drawCircle(int x, int y, int r);
+  void drawCircle(int x, int y, double r);
   void drawFilledCircle(int x, int y, int r);
   void drawImage(int x, int y, struct __img__ * img);
 
 private:
+  void plot(int x, int y, double c);
+  double ipart(double x);
+  double round(double x);
+  double fpart(double x);
+  double rfpart(double x);
+
   Widget *widget;
   PixelBufferAlpha *pixbuf;
   Colour colour;
diff --git a/plugingui/pixelbuffer.cc b/plugingui/pixelbuffer.cc
index fb4d05f..e9e376a 100644
--- a/plugingui/pixelbuffer.cc
+++ b/plugingui/pixelbuffer.cc
@@ -62,7 +62,7 @@ GUI::PixelBufferAlpha::PixelBufferAlpha(size_t width, size_t height)
 {
   this->idx = ::idx++;
   buf = NULL;
-  x = y = 0;
+  x = y = 10;
   realloc(width, height);
 }
 
@@ -84,12 +84,39 @@ void GUI::PixelBufferAlpha::setPixel(size_t x, size_t y,
 {
   //  printf("%d %d %d %d\n", red, green, blue, alpha);
   if(x >= width || y >= height) return;
+  /*
+  float a = alpha / 255.0;
+  buf[PX(0)] = (unsigned char)(red * a + buf[PX(0)] * (1-a));
+  buf[PX(1)] = (unsigned char)(green * a + buf[PX(1)] * (1-a));
+  buf[PX(2)] = (unsigned char)(blue * a + buf[PX(2)] * (1-a));
+  buf[PX(3)] = (unsigned char)(alpha * a + buf[PX(3)] * (1-a));
+  */
   buf[PX(0)] = red;
   buf[PX(1)] = green;
   buf[PX(2)] = blue;
   buf[PX(3)] = alpha;
 }
 
+void GUI::PixelBufferAlpha::addPixel(size_t x, size_t y,
+                                     unsigned char red,
+                                     unsigned char green,
+                                     unsigned char blue,
+                                     unsigned char alpha)
+{
+  //  printf("%d %d %d %d\n", red, green, blue, alpha);
+  if(x >= width || y >= height) return;
+
+  if(alpha == 0) return;
+
+  float a = (float)alpha / (float)(alpha + buf[PX(3)]);
+  buf[PX(0)] = (unsigned char)(red * a + buf[PX(0)] * (1-a));
+  buf[PX(1)] = (unsigned char)(green * a + buf[PX(1)] * (1-a));
+  buf[PX(2)] = (unsigned char)(blue * a + buf[PX(2)] * (1-a));
+
+  //buf[PX(3)] = (unsigned char)(alpha * a + buf[PX(3)] * (1-a));
+  buf[PX(3)] = alpha>buf[PX(3)]?alpha:buf[PX(3)];
+}
+
 void GUI::PixelBufferAlpha::pixel(size_t x, size_t y,
                                   unsigned char *red,
                                   unsigned char *green,
diff --git a/plugingui/pixelbuffer.h b/plugingui/pixelbuffer.h
index 29cda7f..21a6ceb 100644
--- a/plugingui/pixelbuffer.h
+++ b/plugingui/pixelbuffer.h
@@ -63,6 +63,12 @@ public:
                 unsigned char blue,
                 unsigned char alpha);
 
+  void addPixel(size_t x, size_t y,
+                unsigned char red,
+                unsigned char green,
+                unsigned char blue,
+                unsigned char alpha);
+
   void pixel(size_t x, size_t y,
              unsigned char *red,
              unsigned char *green,
diff --git a/plugingui/plugingui.cc b/plugingui/plugingui.cc
index 09045ab..2aded27 100644
--- a/plugingui/plugingui.cc
+++ b/plugingui/plugingui.cc
@@ -30,6 +30,7 @@
 #include <stdio.h>
 
 #include "globalcontext.h"
+#include "knob.h"
 
 #ifndef STANDALONE
 #include <drumgizmo.h>
@@ -56,16 +57,40 @@ void checkClick(void *ptr)
   Conf::enable_velocity_modifier = gui->check->checked();
 }
 
-void sliderChange(void *ptr)
+void knobChange(void *ptr)
 {
   PluginGUI *gui = (PluginGUI*)ptr;
-  Conf::velocity_modifier_weight = gui->slider->value();
+  Conf::velocity_modifier_weight = gui->knob->value();
 }
 
-void sliderChange2(void *ptr)
+void knobChange2(void *ptr)
 {
   PluginGUI *gui = (PluginGUI*)ptr;
-  Conf::velocity_modifier_falloff = gui->slider2->value();
+  Conf::velocity_modifier_falloff = gui->knob2->value();
+}
+
+GUI::FileBrowser *fb;
+void selectFile(void *ptr, std::string filename)
+{
+  GUI::LineEdit *le = (GUI::LineEdit *)ptr;
+  le->setText(filename);
+  fb->hide();
+}
+
+void kitBrowseClick(void *ptr)
+{
+  PluginGUI *gui = (PluginGUI*)ptr;
+
+  fb->registerFileSelectHandler(selectFile, gui->lineedit);
+  fb->show();
+}
+
+void midimapBrowseClick(void *ptr)
+{
+  PluginGUI *gui = (PluginGUI*)ptr;
+
+  fb->registerFileSelectHandler(selectFile, gui->lineedit2);
+  fb->show();
 }
 
 void loadKitClick(void *ptr)
@@ -152,66 +177,108 @@ void PluginGUI::init()
   window = new GUI::Window(gctx);
   window->resize(640, 200);
 
+  // Enable Velocity
+  GUI::Label *lbl_enable = new GUI::Label(window);
+  lbl_enable->setText("Enable Velocity Modifier");
+  lbl_enable->move(97, 81);
+  lbl_enable->resize(100, 20);
+
   check = new GUI::CheckBox(window);
   check->move(82,82);
   check->resize(16,16);
   check->setChecked(Conf::enable_velocity_modifier);
   check->registerClickHandler(checkClick, this);
 
-  slider = new GUI::Slider(window);
-  slider->move(100,80);
-  slider->resize(390, 20);
-  slider->setValue(Conf::velocity_modifier_weight);
-  slider->registerClickHandler(sliderChange, this);
-
-  slider2 = new GUI::Slider(window);
-  slider2->move(100,110);
-  slider2->resize(390, 20);
-  slider2->setValue(Conf::velocity_modifier_falloff);
-  slider2->registerClickHandler(sliderChange2, this);
-
-  lbl = new GUI::Label(window);
-  lbl->setText("Drumkit:");
-  lbl->move(10, 10);
-  lbl->resize(70, 20);
-
-  led = new GUI::LED(window);
-  led->move(500,12);
-  led->resize(16, 16);
-  //  led->setState(false);
-
-  lineedit = new FileLineEdit(window, led);
-  if(drumgizmo) lineedit->setText(drumgizmo->drumkitfile());
-  else lineedit->setText("Missing DrumGizmo*");
-  lineedit->move(80, 10);
-  lineedit->resize(410, 20);
-
-  btn_ok = new GUI::Button(window);
-  btn_ok->setText("Load Kit");
-  btn_ok->move(520, 10);
-  btn_ok->resize(100, 20);
-  btn_ok->registerClickHandler(loadKitClick, this);
-
-  lbl2 = new GUI::Label(window);
-  lbl2->setText("Midimap:");
-  lbl2->move(10, 45);
-  lbl2->resize(70, 20);
-
-  led2 = new GUI::LED(window);
-  led2->move(500,47);
-  led2->resize(16, 16);
-  //  led2->setState(false);
-
-  lineedit2 = new FileLineEdit(window, led2);
-  if(drumgizmo) lineedit2->setText(drumgizmo->midimapfile);
-  lineedit2->move(80, 45);
-  lineedit2->resize(410, 20);
-
-  btn_ok2 = new GUI::Button(window);
-  btn_ok2->setText("Load Map");
-  btn_ok2->move(520, 45);
-  btn_ok2->resize(100, 20);
-  btn_ok2->registerClickHandler(loadMidimapClick, this);
+  // Velocity Weight Modifier:
+  {
+    int xpos = 180;
+    GUI::Label *lbl_weight = new GUI::Label(window);
+    lbl_weight->setText("Weight Modifier");
+    lbl_weight->move(xpos, 138);
+    lbl_weight->resize(100, 20);
+
+    knob = new GUI::Knob(window);
+    knob->move(xpos + 30, 100);
+    knob->resize(41, 41);
+    knob->setValue(Conf::velocity_modifier_weight);
+    knob->registerClickHandler(knobChange, this);
+  }
+
+  // Velocity Falloff Modifier:
+  {
+    int xpos = 300;
+    GUI::Label *lbl_falloff = new GUI::Label(window);
+    lbl_falloff->setText("Falloff Modifier");
+    lbl_falloff->move(xpos, 138);
+    lbl_falloff->resize(100, 20);
+    
+    knob2 = new GUI::Knob(window);
+    knob2->move(xpos + 30, 100);
+    knob2->resize(41, 41);
+    knob2->setValue(Conf::velocity_modifier_falloff);
+    knob2->registerClickHandler(knobChange2, this);
+  }
+
+  // Drumkit file
+  {
+    GUI::Label *lbl = new GUI::Label(window);
+    lbl->setText("Drumkit:");
+    lbl->move(10, 10);
+    lbl->resize(70, 20);
+
+    led = new GUI::LED(window);
+    led->move(500,12);
+    led->resize(16, 16);
+    //  led->setState(false);
+
+    lineedit = new FileLineEdit(window, led);
+    if(drumgizmo) lineedit->setText(drumgizmo->drumkitfile());
+    else lineedit->setText("Missing DrumGizmo*");
+    lineedit->move(70, 10);
+    lineedit->resize(408, 20);
+    
+    GUI::Button *btn_brw = new GUI::Button(window);
+    btn_brw->setText("...");
+    btn_brw->move(480, 10);
+    btn_brw->resize(20, 20);
+    btn_brw->registerClickHandler(kitBrowseClick, this);
+
+    btn_ok = new GUI::Button(window);
+    btn_ok->setText("Load Kit");
+    btn_ok->move(520, 10);
+    btn_ok->resize(100, 20);
+    btn_ok->registerClickHandler(loadKitClick, this);
+  }
+
+  // Midimap file
+  {
+    lbl2 = new GUI::Label(window);
+    lbl2->setText("Midimap:");
+    lbl2->move(10, 45);
+    lbl2->resize(70, 20);
+    
+    led2 = new GUI::LED(window);
+    led2->move(500,47);
+    led2->resize(16, 16);
+    //  led2->setState(false);
+    
+    lineedit2 = new FileLineEdit(window, led2);
+    if(drumgizmo) lineedit2->setText(drumgizmo->midimapfile);
+    lineedit2->move(70, 45);
+    lineedit2->resize(408, 20);
+    
+    GUI::Button *btn_brw = new GUI::Button(window);
+    btn_brw->setText("...");
+    btn_brw->move(480, 45);
+    btn_brw->resize(20, 20);
+    btn_brw->registerClickHandler(midimapBrowseClick, this);
+
+    btn_ok2 = new GUI::Button(window);
+    btn_ok2->setText("Load Map");
+    btn_ok2->move(520, 45);
+    btn_ok2->resize(100, 20);
+    btn_ok2->registerClickHandler(loadMidimapClick, this);
+  }
 
   btn_cancel = new GUI::Button(window);
   btn_cancel->setText("Close");
@@ -224,6 +291,13 @@ void PluginGUI::init()
   lbl3->move(120, 180);
   lbl3->resize(70, 20);
 
+  // Create filebrowser
+  filebrowser = new GUI::FileBrowser(window);
+  filebrowser->move(0, 0);
+  filebrowser->resize(window->width() - 1, window->height() - 1);
+  filebrowser->hide();
+  fb = filebrowser;
+
   window->show();
 }
 
@@ -279,6 +353,7 @@ void stop(void *ptr)
 
 int main()
 {
+/*
   hug_status_t status = hug_init(HUG_FLAG_OUTPUT_TO_SYSLOG,
                                  HUG_OPTION_SYSLOG_HOST, "192.168.0.10",
                                  HUG_OPTION_SYSLOG_PORT, 514,
@@ -288,7 +363,7 @@ int main()
     printf("Error: %d\n", status);
     return 1;
   }
-
+*/
   INFO(example, "We are up and running");
 
   bool running = true;
diff --git a/plugingui/plugingui.h b/plugingui/plugingui.h
index 086a8d5..d6ddde3 100644
--- a/plugingui/plugingui.h
+++ b/plugingui/plugingui.h
@@ -35,7 +35,9 @@
 #include "filelineedit.h"
 #include "checkbox.h"
 #include "button.h"
-#include "slider.h"
+#include "knob.h"
+
+#include "filebrowser.h"
 
 #include "thread.h"
 
@@ -63,11 +65,13 @@ public:
   GUI::Window *window;
   GUI::EventHandler *eventhandler;
 
+  GUI::FileBrowser *filebrowser;
+
   DrumGizmo *drumgizmo;
 
   GUI::CheckBox *check;
-  GUI::Slider *slider;
-  GUI::Slider *slider2;
+  GUI::Knob *knob;
+  GUI::Knob *knob2;
 
   GUI::Button *btn_ok;
   GUI::Button *btn_ok2;
diff --git a/plugingui/slider.cc b/plugingui/slider.cc
index b58bde9..953c8e6 100644
--- a/plugingui/slider.cc
+++ b/plugingui/slider.cc
@@ -66,6 +66,10 @@ void GUI::Slider::mouseMoveEvent(MouseMoveEvent *e)
 {
   if(state == down) {
     val = maximum / (float)width() * (float)e->x;
+
+    if(val < 0) val = 0;
+    if(val > 1) val = 1;
+
     if(handler) handler(ptr);
     repaintEvent(NULL);
   }
@@ -76,12 +80,20 @@ void GUI::Slider::buttonEvent(ButtonEvent *e)
   if(e->direction == 1) {
     state = down;
     val = maximum / (float)width() * (float)e->x;
+
+    if(val < 0) val = 0;
+    if(val > 1) val = 1;
+
     if(handler) handler(ptr);
     repaintEvent(NULL);
   }
   if(e->direction == -1) {
     state = up;
     val = maximum / (float)width() * (float)e->x;
+    
+    if(val < 0) val = 0;
+    if(val > 1) val = 1;
+
     repaintEvent(NULL);
     clicked();
     if(handler) handler(ptr);
@@ -90,7 +102,7 @@ void GUI::Slider::buttonEvent(ButtonEvent *e)
 
 void GUI::Slider::repaintEvent(GUI::RepaintEvent *e)
 {
-  DEBUG(slider, "Slider::repaintEvent (%f)\n", val);
+  //DEBUG(slider, "Slider::repaintEvent (%f)\n", val);
 
   Painter p(this);
 
diff --git a/plugingui/widget.cc b/plugingui/widget.cc
index 4b09732..eb7b0b6 100644
--- a/plugingui/widget.cc
+++ b/plugingui/widget.cc
@@ -27,9 +27,7 @@
 #include "widget.h"
 
 #include "globalcontext.h"
-
 #include "painter.h"
-
 #include "window.h"
 
 #include <stdio.h>
@@ -37,24 +35,41 @@
 GUI::Widget::Widget(Widget *parent)
   : pixbuf(1, 1)
 {
+  _width = _height = 10;
+
   this->parent = parent;
   if(parent) {
     parent->addChild(this);
     _window = parent->window();
   }
   _width = _height = 0;
+  _visible = true;
 }
 
 GUI::Widget::~Widget()
 {
+  if(parent) parent->removeChild(this);
 }
 
 void GUI::Widget::show()
 {
+  setVisible(true);
 }
 
 void GUI::Widget::hide()
 {
+  setVisible(false);
+}
+
+void GUI::Widget::setVisible(bool v)
+{
+  _visible = v;
+  repaintEvent(NULL);
+}
+
+bool GUI::Widget::visible()
+{
+  return _visible;
 }
 
 void GUI::Widget::addChild(GUI::Widget *widget)
@@ -62,6 +77,18 @@ void GUI::Widget::addChild(GUI::Widget *widget)
   children.push_back(widget);
 }
 
+void GUI::Widget::removeChild(GUI::Widget *widget)
+{
+  std::vector<Widget *>::iterator i = children.begin();
+  while(i != children.end()) {
+    if(*i == widget) {
+      children.erase(i);
+      return;
+    }
+    i++;
+  }
+}
+
 void GUI::Widget::resize(size_t width, size_t height)
 {
   _width = width;
@@ -73,8 +100,16 @@ void GUI::Widget::move(size_t x, size_t y)
 {
   _x = x;
   _y = y;
-  pixbuf.x = x;
-  pixbuf.y = y;
+  /*
+  Widget *p = parent;
+  while(p) {
+    x += p->pixbuf.x;
+    y += p->pixbuf.y;
+    p = p->parent;
+  }
+  */
+  // pixbuf.x = x;
+  //  pixbuf.y = y;
 }
 
 size_t GUI::Widget::x() { return _x; }
@@ -82,14 +117,30 @@ size_t GUI::Widget::y() { return _y; }
 size_t GUI::Widget::width() { return _width; }
 size_t GUI::Widget::height() { return _height; }
 
+size_t GUI::Widget::windowX()
+{
+  size_t window_x = x();
+  if(parent) window_x += parent->windowX();
+  return window_x;
+}
+
+size_t GUI::Widget::windowY()
+{
+  size_t window_y = y();
+  if(parent) window_y += parent->windowY();
+  return window_y;
+}
+
 GUI::Widget *GUI::Widget::find(size_t x, size_t y)
 {
-  std::vector<Widget*>::iterator i = children.begin();
-  while(i != children.end()) {
+  std::vector<Widget*>::reverse_iterator i = children.rbegin();
+  while(i != children.rend()) {
     Widget *w = *i;
-    if(w->x() <= x && (w->x() + w->width()) >= x &&
-       w->y() <= y && w->y() + w->height() >= y)
-      return w->find(x - w->x(), y - w->y());
+    if(w->visible()) {
+      if(w->x() <= x && (w->x() + w->width()) >= x &&
+         w->y() <= y && w->y() + w->height() >= y)
+        return w->find(x - w->x(), y - w->y());
+    }
     i++;
   }
 
@@ -104,8 +155,10 @@ GUI::Window *GUI::Widget::window()
 
 void GUI::Widget::repaint_r(GUI::RepaintEvent *e)
 {
-  Painter p(this);
+  Painter p(this); // make sure pixbuf refcount is incremented.
+
   repaintEvent(e);
+
   std::vector<Widget*>::iterator i = children.begin();
   while(i != children.end()) {
     Widget *w = *i;
@@ -118,13 +171,18 @@ std::vector<GUI::PixelBufferAlpha *> GUI::Widget::getPixelBuffers()
 {
   std::vector<PixelBufferAlpha *> pbs;
 
+  pixbuf.x = windowX();
+  pixbuf.y = windowY();
+
   pbs.push_back(&pixbuf);
 
   std::vector<Widget*>::iterator i = children.begin();
   while(i != children.end()) {
     Widget *w = *i;
-    std::vector<PixelBufferAlpha *> pbs0 = w->getPixelBuffers();
-    pbs.insert(pbs.end(), pbs0.begin(), pbs0.end());
+    if(w->visible()) {
+      std::vector<PixelBufferAlpha *> pbs0 = w->getPixelBuffers();
+      pbs.insert(pbs.end(), pbs0.begin(), pbs0.end());
+    }
     i++;
   }
 
diff --git a/plugingui/widget.h b/plugingui/widget.h
index 6f09533..c0d0a73 100644
--- a/plugingui/widget.h
+++ b/plugingui/widget.h
@@ -27,10 +27,9 @@
 #ifndef __DRUMGIZMO_WIDGET_H__
 #define __DRUMGIZMO_WIDGET_H__
 
-#include <vector>
-
 #include "guievent.h"
 #include "pixelbuffer.h"
+
 #include <vector>
 
 namespace GUI {
@@ -50,6 +49,8 @@ public:
 
   virtual size_t x();
   virtual size_t y();
+  virtual size_t windowX();
+  virtual size_t windowY();
   virtual size_t width();
   virtual size_t height();
 
@@ -57,6 +58,7 @@ public:
   virtual bool catchMouse() { return false; }
 
   void addChild(Widget *widget);
+  void removeChild(Widget *widget);
 
   virtual void repaintEvent(RepaintEvent *e) {}
   virtual void mouseMoveEvent(MouseMoveEvent *e) {}
@@ -74,11 +76,18 @@ public:
 
   bool hasKeyboardFocus();
 
+  Widget *parent;
+
+  bool visible();
+  void setVisible(bool visible);
+
 protected:
   std::vector<Widget*> children;
-  Widget *parent;
   Window *_window;
   size_t _x, _y, _width, _height;
+
+private:
+  bool _visible;
 };
 
 };
diff --git a/plugingui/window.cc b/plugingui/window.cc
index bbeffa1..1795d62 100644
--- a/plugingui/window.cc
+++ b/plugingui/window.cc
@@ -104,6 +104,8 @@ size_t GUI::Window::x() { return _x; }
 size_t GUI::Window::y() { return _y; }
 size_t GUI::Window::width() { return _width; }
 size_t GUI::Window::height() { return _height; }
+size_t GUI::Window::windowX() { return 0; }
+size_t GUI::Window::windowY() { return 0; }
 
 void GUI::Window::show()
 {
@@ -200,5 +202,6 @@ GUI::Widget *GUI::Window::buttonDownFocus()
 void GUI::Window::setButtonDownFocus(GUI::Widget *widget)
 {
   _buttonDownFocus = widget;
+  native->grabMouse(widget != NULL);
   //  repaint_r(NULL);
 }
diff --git a/plugingui/window.h b/plugingui/window.h
index 8e61603..0820b40 100644
--- a/plugingui/window.h
+++ b/plugingui/window.h
@@ -49,6 +49,8 @@ public:
 
   size_t x();
   size_t y();
+  size_t windowX();
+  size_t windowY();
   size_t width();
   size_t height();