Import dgedit from drumgizmo repository (split into its own project).

1 files changed, 108 insertions, 0 deletions

diff --git a/src/zoomslider.cc b/src/zoomslider.cc
new file mode 100644
index 0000000..0a2abb1
--- /dev/null
+++ b/src/zoomslider.cc
@@ -0,0 +1,108 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            zoomslider.cc
+ *
+ *  Fri May  2 21:23:26 CEST 2014
+ *  Copyright 2014 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 45Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "zoomslider.h"
+
+#include <QPainter>
+
+ZoomSlider::ZoomSlider(Qt::Orientation orientation)
+  : QSlider(orientation)
+{
+  inverted = false;
+  from = 0;
+  to = 1;
+  tick_width = 0.1;
+
+  connect(this, SIGNAL(valueChanged(int)), this, SLOT(sliderValueChanged(int)));
+}
+
+void ZoomSlider::paintEvent(QPaintEvent *ev)
+{
+  /*
+  QPainter p(this);
+  p.drawLine(0, 0, width(), height());
+  */
+  QSlider::paintEvent(ev);
+}
+
+void ZoomSlider::setRange(float from, float to)
+{
+  this->inverted = false;
+  this->from = from;
+  this->to = to;
+
+  int i_from = from / tick_width;
+  int i_to = to / tick_width;
+
+  if(i_from > i_to) {
+    this->inverted = true;
+    int tmp;
+    tmp = i_from;
+    i_from = i_to;
+    i_to = tmp;
+  }
+
+  QSlider::setRange(i_from, i_to);
+}
+
+float ZoomSlider::fromSlider(int value)
+{
+  float val = (float)value * tick_width;
+
+  if(inverted) {
+    val *= -1;
+    val = val - to + from;
+
+    if(value == QSlider::minimum()) val = from;
+    if(value == QSlider::maximum()) val = to;
+  } else {
+    if(value == QSlider::minimum()) val = from;
+    if(value == QSlider::maximum()) val = to;
+  }
+
+  return val;
+}
+
+void ZoomSlider::sliderValueChanged(int value)
+{
+  emit valueChanged(fromSlider(value));
+}
+
+void ZoomSlider::setTickWidth(float tick_width)
+{
+  this->tick_width = tick_width;
+  setRange(from, to); // Update slider value span.
+}
+
+void ZoomSlider::setValue(float value)
+{
+  int i_value = value * tick_width;
+  if(inverted) {
+    i_value *= -1;
+    i_value += from;
+  }
+  QSlider::setValue(i_value);
+}