Split UI code into application/plugin UI and UI library.

1 files changed, 217 insertions, 0 deletions

diff --git a/dggui/slider.cc b/dggui/slider.cc
new file mode 100644
index 0000000..15a82b3
--- /dev/null
+++ b/dggui/slider.cc
@@ -0,0 +1,217 @@
+/* -*- 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::