From b6e20e04b519e50909331f537df2ea6114a137ee Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Sat, 23 Jul 2016 19:16:28 +0200
Subject: General ui code improvements, moved layout related variables to
 ui::UI, added ColorPicker widget.

---
 src/ui/colorpicker.cc | 131 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 src/ui/colorpicker.cc

(limited to 'src/ui/colorpicker.cc')

diff --git a/src/ui/colorpicker.cc b/src/ui/colorpicker.cc
new file mode 100644
index 0000000..4180334
--- /dev/null
+++ b/src/ui/colorpicker.cc
@@ -0,0 +1,131 @@
+/*
+   ui/colorpicker.cc
+   This file is part of the Osirion project and is distributed under
+   the terms of the GNU General Public License version 2
+*/
+
+#include "ui/bitmap.h"
+#include "ui/colorpicker.h"
+#include "ui/slider.h"
+#include "ui/label.h"
+#include "ui/ui.h"
+
+#include "math/functions.h"
+
+namespace ui 
+{
+	
+ColorPicker::ColorPicker(Widget *parent) : Widget(parent)
+{
+	set_label("colorpicker");
+	
+	_label_red = new Label(this, "R");
+	_label_red->set_alignment(AlignLeft | AlignVCenter);
+	_label_red->set_border(false);
+	_label_red->set_background(false);
+	_slider_red = new Slider(this, 0.0f, 255.0f);
+	
+	_label_green = new Label(this, "G");
+	_label_green->set_alignment(AlignLeft | AlignVCenter);
+	_label_green->set_border(false);
+	_label_green->set_background(false);
+	_slider_green = new Slider(this, 0.0f, 255.0f);
+	
+	_label_blue = new Label(this, "B");
+	_label_blue->set_alignment(AlignLeft | AlignVCenter);
+	_label_blue->set_border(false);
+	_label_blue->set_background(false);
+	_slider_blue = new Slider(this, 0.0f, 255.0f);
+	
+	_color_preview = new Bitmap(this);
+	_color_preview->set_label("preview");
+	_color_preview->set_border(true);
+
+	color_changed();
+}
+
+ColorPicker::~ColorPicker()
+{
+}
+
+void ColorPicker::set_color(const math::Color & color)
+{
+	_color.assign(color);
+	color_changed();
+}
+	
+void ColorPicker::set_color(const float r, const float g, const float b)
+{
+	_color.assign(r, g, b);
+	color_changed();
+}
+
+void ColorPicker::color_changed()
+{
+	_slider_red->set_value(_color.red() * 255.0f);
+	_slider_green->set_value(_color.green() * 255.0f);
+	_slider_blue->set_value(_color.blue() * 255.0f);
+	_color_preview->set_color(_color);
+}
+
+void ColorPicker::resize()
+{
+	const float margin = UI::margin;
+	const float w = font()->width() * 3.0f;
+	const float h = (height() - margin * 4.0f) / 3.0f;
+	
+	const float r = math::min(width(), height()) - 2.0f * margin;
+	
+	// resize color preview
+	_color_preview->set_size(r,r);
+	_color_preview->set_location(width() - r - margin, height() - r - margin);
+	
+	// resize red channel label
+	_label_red->set_size(w, h);
+	_label_red->set_location(margin, margin);
+	// resize red channel slider
+	_slider_red->set_location(_label_red->right(), _label_red->top());
+	_slider_red->set_size(_color_preview->left() - _label_red->right() - 2.0f * margin, h);
+	
+	_label_green->set_size(w, h);
+	_label_green->set_location(margin, 2.0f * margin + h);
+	// resize green channel slider
+	_slider_green->set_location(_label_green->right(), _label_green->top());
+	_slider_green->set_size(_color_preview->left() - _label_green->right() - 2.0f * margin, h);
+	
+	_label_blue->set_size(w, h);
+	_label_blue->set_location(margin, 3.0f * margin + 2.0f * h);
+	// resize blue channel slider
+	_slider_blue->set_location(_label_blue->right(), _label_blue->top());
+	_slider_blue->set_size(_color_preview->left() - _label_blue->right() - 2.0f * margin, h);
+}
+
+bool ColorPicker::on_emit(Widget *sender, const Event event, void *data)
+{
+	if (event == ui::Widget::EventSliderChanged)
+	{
+		if (sender == _slider_red)
+		{
+			_color[0] = _slider_red->value() / 255.0f;
+			_color_preview->set_color(_color);
+			return true;
+		}
+		else if (sender == _slider_green)
+		{
+			_color[1] = _slider_green->value() / 255.0f;
+			_color_preview->set_color(_color);
+			return true;
+		}
+		else if (sender == _slider_blue)
+		{
+			_color[2] = _slider_blue->value() / 255.0f;
+			_color_preview->set_color(_color);
+			return true;
+		}	
+	}
+	
+	// unhandled event
+	return false;
+}
+
+}
-- 
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