Add modal dialog primitive.

5 files changed, 201 insertions, 33 deletions

diff --git a/plugingui/Makefile.am b/plugingui/Makefile.am
index 133c71f..8795acd 100644
--- a/plugingui/Makefile.am
+++ b/plugingui/Makefile.am
@@ -20,53 +20,54 @@ libdggui_la_LIBADD = \
 	$(GUI_LIBS) $(PTHREAD_LIBS)
 
 nodist_libdggui_la_SOURCES = \
+	button.cc \
+	button_base.cc \
+	checkbox.cc \
+	colour.cc \
+	combobox.cc \
 	dgwindow.cc \
-	plugingui.cc \
-	label.cc \
+	dialog.cc \
+	directory.cc \
+	diskstreamingframecontent.cc \
+	drumkitframecontent.cc \
 	eventhandler.cc \
+	filebrowser.cc \
 	font.cc \
-	window.cc \
-	widget.cc \
-	colour.cc \
+	frame.cc \
+	humanizerframecontent.cc \
+	image.cc \
+	imagecache.cc \
+	knob.cc \
+	label.cc \
+	layout.cc \
+	led.cc \
+	lineedit.cc \
+	listbox.cc \
+	listboxbasic.cc \
+	listboxthin.cc \
+	maintab.cc \
+	mainwindow.cc \
 	painter.cc \
-	button_base.cc \
-	button.cc \
 	pixelbuffer.cc \
-	lineedit.cc \
-	led.cc \
-	checkbox.cc \
-	toggle.cc \
+	pluginconfig.cc \
+	plugingui.cc \
 	powerbutton.cc \
-	mainwindow.cc \
-	drumkitframecontent.cc \
-	statusframecontent.cc \
-	humanizerframecontent.cc \
-	diskstreamingframecontent.cc \
-	slider.cc \
+	progressbar.cc \
+	resource.cc \
+	resource_data.cc \
 	scrollbar.cc \
+	slider.cc \
 	stackedwidget.cc \
+	statusframecontent.cc \
 	tabbutton.cc \
 	tabwidget.cc \
 	textedit.cc \
 	texture.cc \
 	texturedbox.cc \
-	layout.cc \
-	listbox.cc \
-	listboxthin.cc \
-	listboxbasic.cc \
-	maintab.cc \
-	knob.cc \
-	filebrowser.cc \
-	directory.cc \
-	pluginconfig.cc \
-	imagecache.cc \
-	image.cc \
-	combobox.cc \
-	progressbar.cc \
+	toggle.cc \
 	verticalline.cc \
-	resource.cc \
-	resource_data.cc \
-	frame.cc \
+	widget.cc \
+	window.cc \
 	lodepng/lodepng.cpp
 
 if ENABLE_X11
@@ -106,12 +107,14 @@ rcgen_SOURCES = rcgen.cc
 
 EXTRA_DIST = \
 	button.h \
+	button_base.h \
 	canvas.h \
 	checkbox.h \
 	colour.h \
 	combobox.h \
 	dgwindow.h \
 	drawable.h \
+	dialog.h \
 	directory.h \
 	eventhandler.h \
 	filebrowser.h \
diff --git a/plugingui/dialog.cc b/plugingui/dialog.cc
new file mode 100644
index 0000000..9ba579d
--- /dev/null
+++ b/plugingui/dialog.cc
@@ -0,0 +1,54 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            dialog.cc
+ *
+ *  Sun Apr 16 10:31:04 CEST 2017
+ *  Copyright 2017 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 Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser 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 "dialog.h"
+
+namespace GUI
+{
+
+Dialog::Dialog(Widget* parent, bool modal)
+	: parent(parent)
+{
+	parent->window()->eventHandler()->registerDialog(this);
+	setModal(modal);
+}
+
+Dialog::~Dialog()
+{
+	parent->window()->eventHandler()->unregisterDialog(this);
+}
+
+void Dialog::setModal(bool modal)
+{
+	is_modal = modal;
+}
+
+bool Dialog::isModal() const
+{
+	return is_modal;
+}
+
+} // GUI::
diff --git a/plugingui/dialog.h b/plugingui/dialog.h
new file mode 100644
index 0000000..1b0c6da
--- /dev/null
+++ b/plugingui/dialog.h
@@ -0,0 +1,63 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            dialog.h
+ *
+ *  Sun Apr 16 10:31:04 CEST 2017
+ *  Copyright 2017 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 Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser 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.
+ */
+#pragma once
+
+#include "window.h"
+
+namespace GUI
+{
+
+//! This class is used the base window for pop-up dialogs, such as a file
+//! browser.
+class Dialog
+	: public Window
+{
+public:
+	//! - The dialog is placed near the parent window.
+	//! - The parent window event handler will call the dialog event handler
+	//! - While the dialog is visible, all mouse click and keyboard events
+	//!   are ignored by the parent event handler.
+	//! - The Dialog registers itself in the parent event handler when contructed
+	//!   and removes itself when destructed.
+	//! - The parent event handler will delete all registered Dialogs when itself
+	//!   deleted.
+	Dialog(Widget* parent, bool modal = false);
+
+	~Dialog();
+
+	//! Change modality.
+	void setModal(bool modal);
+
+	//! Get current modality state.
+	bool isModal() const;
+
+private:
+	bool is_modal{false};
+	Widget* parent{nullptr};
+};
+
+} // GUI::
diff --git a/plugingui/eventhandler.cc b/plugingui/eventhandler.cc
index a57e74b..decca01 100644
--- a/plugingui/eventhandler.cc
+++ b/plugingui/eventhandler.cc
@@ -28,6 +28,7 @@
 
 #include "window.h"
 #include "painter.h"
+#include "dialog.h"
 
 namespace GUI
 {
@@ -63,6 +64,16 @@ std::shared_ptr<Event> EventHandler::getNextEvent()
 
 void EventHandler::processEvents()
 {
+	bool block_interaction{false};
+	for(auto dialog : dialogs)
+	{
+		if(dialog->visible())
+		{
+			block_interaction |= dialog->isModal();
+			dialog->eventHandler()->processEvents();
+		}
+	}
+
 	events = nativeWindow.getEvents();
 
 	while(hasEvent())
@@ -147,6 +158,11 @@ void EventHandler::processEvents()
 
 		case EventType::button:
 			{
+				if(block_interaction)
+				{
+					continue;
+				}
+
 				auto buttonEvent = static_cast<ButtonEvent*>(event.get());
 				if(lastWasDoubleClick && (buttonEvent->direction == Direction::down))
 				{
@@ -195,6 +211,11 @@ void EventHandler::processEvents()
 
 		case EventType::scroll:
 			{
+				if(block_interaction)
+				{
+					continue;
+				}
+
 				auto scrollEvent = static_cast<ScrollEvent*>(event.get());
 
 				auto widget = window.find(scrollEvent->x, scrollEvent->y);
@@ -210,6 +231,10 @@ void EventHandler::processEvents()
 
 		case EventType::key:
 			{
+				if(block_interaction)
+				{
+					continue;
+				}
 
 				// TODO: Filter out multiple arrow events.
 
@@ -222,6 +247,11 @@ void EventHandler::processEvents()
 			break;
 
 		case EventType::close:
+			if(block_interaction)
+			{
+				continue;
+			}
+
 			closeNotifier();
 			break;
 		}
@@ -232,4 +262,15 @@ void EventHandler::processEvents()
 	window.updateBuffer();
 }
 
+void EventHandler::registerDialog(Dialog* dialog)
+{
+	dialogs.push_back(dialog);
+}
+
+void EventHandler::unregisterDialog(Dialog* dialog)
+{
+	dialogs.remove(dialog);
+}
+
+
 } // GUI::
diff --git a/plugingui/eventhandler.h b/plugingui/eventhandler.h
index bd79084..8d6f492 100644
--- a/plugingui/eventhandler.h
+++ b/plugingui/eventhandler.h
@@ -29,6 +29,7 @@
 #include <notifier.h>
 #include <memory>
 #include <queue>
+#include <list>
 
 #include "guievent.h"
 #include "nativewindow.h"
@@ -37,6 +38,7 @@ namespace GUI
 {
 
 class Window;
+class Dialog;
 
 class EventHandler
 {
@@ -56,6 +58,9 @@ public:
 	//! \return A pointer to the event or nullptr if there are none.
 	std::shared_ptr<Event> getNextEvent();
 
+	void registerDialog(Dialog* dialog);
+	void unregisterDialog(Dialog* dialog);
+
 	Notifier<> closeNotifier;
 
 private:
@@ -66,6 +71,8 @@ private:
 	bool lastWasDoubleClick;
 
 	EventQueue events;
+
+	std::list<Dialog*> dialogs;
 };
 
 } // GUI::