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authorBent Bisballe Nyeng <deva@aasimon.org>2020-12-29 16:09:43 +0100
committerBent Bisballe Nyeng <deva@aasimon.org>2020-12-29 16:39:54 +0100
commit645250e1cd8ce9bc1faea599df7a1b05836bfeb8 (patch)
treec6311afab3900d2dd2aecbfbe1ac348d0e48c428 /dggui/slider.cc
parentdce64999d3325c5b55499d6ba657066efa48fbff (diff)
Split UI code into application/plugin UI and UI library.
Diffstat (limited to 'dggui/slider.cc')
-rw-r--r--dggui/slider.cc217
1 files changed, 217 insertions, 0 deletions
diff --git a/dggui/slider.cc b/dggui/slider.cc
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+++ b/dggui/slider.cc
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * slider.cc
+ *
+ * Sat Nov 26 18:10:22 CET 2011
+ * Copyright 2011 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 "slider.h"
+
+#include "painter.h"
+
+#include <hugin.hpp>
+#include <stdio.h>
+
+namespace GUI
+{
+
+Slider::Slider(Widget* parent) : Widget(parent)
+{
+ state = State::up;
+
+ current_value = 0.0;
+ maximum = 1.0;
+ minimum = 0.0;
+}
+
+void Slider::setValue(float new_value)
+{
+ current_value = new_value;
+ if (current_value < 0.)
+ {
+ current_value = 0.;
+ }
+ else if (current_value > 1.0) {
+ current_value = 1.0;
+ }
+
+ redraw();
+ clickNotifier();
+ valueChangedNotifier(current_value);
+}
+
+float Slider::value() const
+{
+ return current_value;
+}
+
+void Slider::setColour(Colour colour)
+{
+ switch (colour) {
+ case Colour::Green:
+ active_inner_bar = &inner_bar_green;
+ break;
+ case Colour::Red:
+ active_inner_bar = &inner_bar_red;
+ break;
+ case Colour::Blue:
+ active_inner_bar = &inner_bar_blue;
+ break;
+ case Colour::Yellow:
+ active_inner_bar = &inner_bar_yellow;
+ break;
+ case Colour::Purple:
+ active_inner_bar = &inner_bar_purple;
+ break;
+ case Colour::Grey:
+ active_inner_bar = &inner_bar_grey;
+ break;
+ }
+
+ if (enabled) { inner_bar = active_inner_bar; }
+}
+
+void Slider::setEnabled(bool enabled)
+{
+ this->enabled = enabled;
+
+ if (enabled) {
+ inner_bar = active_inner_bar;
+ }
+ else {
+ active_inner_bar = inner_bar;
+ inner_bar = &inner_bar_light_grey;
+ }
+
+ redraw();
+}
+
+void Slider::repaintEvent(RepaintEvent* repaintEvent)
+{
+ Painter p(*this);
+
+ auto inner_offset = (current_value / maximum) * getControlWidth();
+ auto button_x = button_offset + inner_offset - (button.width() / 2);
+ auto button_y = (height() - button.height()) / 2;
+
+ // draw bar
+ bar.setSize(width(), height());
+ p.drawImage(0, 0, bar);
+
+ // draw inner bar
+ inner_bar->setSize(button_x - bar_boundary, height() - 2 * bar_boundary);
+ p.drawImage(bar_boundary, bar_boundary, *inner_bar);
+
+ // draw button
+ p.drawImage(button_x, button_y, button);
+}
+
+void Slider::buttonEvent(ButtonEvent* buttonEvent)
+{
+ // Ignore everything except left clicks.
+ if(!enabled || buttonEvent->button != MouseButton::left)
+ {
+ return;
+ }
+
+ if(buttonEvent->direction == Direction::down)
+ {
+ state = State::down;
+ recomputeCurrentValue(buttonEvent->x);
+
+ redraw();
+ clickNotifier();
+ valueChangedNotifier(current_value);
+ }
+
+ if(buttonEvent->direction == Direction::up)
+ {
+ state = State::up;
+ recomputeCurrentValue(buttonEvent->x);
+
+ redraw();
+ clickNotifier();
+ valueChangedNotifier(current_value);
+ }
+}
+
+void Slider::mouseMoveEvent(MouseMoveEvent* mouseMoveEvent)
+{
+ if(state == State::down)
+ {
+ recomputeCurrentValue(mouseMoveEvent->x);
+
+ redraw();
+ clickNotifier();
+ valueChangedNotifier(current_value);
+ }
+}
+
+void Slider::scrollEvent(ScrollEvent* scrollEvent)
+{
+ if (!enabled) { return; }
+
+ current_value -= scrollEvent->delta/(float)getControlWidth();
+ if (current_value < 0.)
+ {
+ current_value = 0.;
+ }
+ else if (current_value > 1.0) {
+ current_value = 1.0;
+ }
+
+ redraw();
+ clickNotifier();
+ valueChangedNotifier(current_value);
+}
+
+std::size_t Slider::getControlWidth() const
+{
+ if(width() < 2 * button_offset)
+ {
+ return 0;
+ }
+
+ return width() - 2 * button_offset;
+}
+
+void Slider::recomputeCurrentValue(float x)
+{
+ if(x < button_offset)
+ {
+ current_value = 0;
+ }
+ else
+ {
+ current_value = (x - button_offset) / getControlWidth();
+ }
+
+ if (current_value < 0.)
+ {
+ current_value = 0.;
+ }
+ else if (current_value > 1.0) {
+ current_value = 1.0;
+ }
+}
+
+} // GUI::