From e40f70a3af1142e6c0c89c6ea2ee47b996495661 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Mon, 20 Sep 2010 16:30:45 +0000
Subject: corrected trading inconsistencies, improved trade window, initial
 slider widget

---
 src/ui/slider.cc | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 src/ui/slider.cc

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

diff --git a/src/ui/slider.cc b/src/ui/slider.cc
new file mode 100644
index 0000000..5de82b2
--- /dev/null
+++ b/src/ui/slider.cc
@@ -0,0 +1,111 @@
+/*
+   ui/slider.cc
+   This file is part of the Osirion project and is distributed under
+   the terms of the GNU General Public License version 2
+*/
+
+#include "math/functions.h"
+#include "ui/paint.h"
+#include "ui/slider.h"
+
+namespace ui {
+
+Slider::Slider(Widget *parent, const float minimum, const float maximum) : Widget(parent)
+{
+	slider_minimum = minimum;
+	slider_maximum = maximum;
+	slider_value = slider_minimum;
+
+	slider_minbutton = new ui::Button(this, "<");
+	slider_minbutton->set_border(false);
+	
+	slider_maxbutton = new ui::Button(this, ">>");
+	slider_maxbutton->set_border(false);
+	
+	validate();
+}
+
+Slider::~Slider() {
+}
+
+void Slider::set_value(const float value)
+{
+	slider_value = value;
+	validate();
+}
+
+void Slider::set_minimum(const float minimum)
+{
+	slider_minimum = minimum;
+	validate();
+}
+
+void Slider::set_maximum(const float maximum)
+{
+	slider_maximum = maximum;
+	validate();
+}
+
+void Slider::set_range(const float minimum, const float maximum)
+{
+	slider_minimum = minimum;
+	slider_maximum = maximum;
+	validate();
+}
+
+void Slider::validate()
+{
+	if (slider_minimum > slider_maximum) {
+		math::swap(slider_minimum, slider_maximum);
+	}
+
+	math::clamp(slider_value, slider_minimum, slider_maximum);
+}
+
+void Slider::print(const size_t indent) const
+{
+	std::string marker("");
+	con_print << aux::pad_left(marker, indent*2) << label() << " \"" << minimum() << "-" << maximum() << "\"" << std::endl;
+}
+
+bool Slider::on_emit(Widget *sender, const Event event, void *data)
+{
+	if (event == EventButtonClicked) {
+		if (sender == slider_minbutton) {
+			slider_value = slider_minimum;
+			emit(EventSliderChanged, this);
+			return true;
+		} else if (sender == slider_maxbutton) {
+			slider_value = slider_maximum;
+			emit(EventSliderChanged, this);
+			return true;
+		}
+	}
+	
+	return false;
+}
+
+
+void Slider::resize()
+{
+	// note: slider expects width > height
+	slider_minbutton->set_size(height(), height());
+	slider_minbutton->set_location(0, 0);
+	
+	slider_maxbutton->set_size(height(), height());
+	slider_maxbutton->set_location(width() - slider_maxbutton->width(), 0);
+}
+
+void Slider::draw()
+{
+	if (slider_maximum > slider_minimum) {
+		const float range = (slider_value - slider_minimum) / (slider_maximum - slider_minimum);
+		const float x = (width() - 3.0f * height()) * range;
+		Paint::set_color(palette()->foreground());
+		Paint::draw_rectangle(math::Vector2f(global_location().x() + height() + x, global_location().y()), math::Vector2f(height(), height()));
+	}
+	
+	Widget::draw();
+}
+
+} // namespace ui
-- 
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