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/*
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)
{
set_label("slider");
slider_dragging = false;
slider_minimum = minimum;
slider_maximum = maximum;
slider_value = slider_minimum;
slider_minbutton = new ui::Button(this, "<");
slider_minbutton->set_border(false);
slider_decbutton = new ui::Button(this, "-");
slider_decbutton->set_border(false);
slider_incbutton = new ui::Button(this, "+");
slider_incbutton->set_border(false);
slider_maxbutton = new ui::Button(this, ">");
slider_maxbutton->set_border(false);
set_background(true);
set_border(true);
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_decbutton) {
if (slider_value > slider_minimum) {
slider_value--;
emit(EventSliderChanged, this);
}
return true;
} else if (sender == slider_incbutton) {
if (slider_value < slider_maximum) {
slider_value++;
emit(EventSliderChanged, this);
}
return true;
} else if (sender == slider_maxbutton) {
slider_value = slider_maximum;
emit(EventSliderChanged, this);
return true;
}
}
return false;
}
bool Slider::on_keypress(const int key, const unsigned int modifier)
{
switch (key) {
case 512 + SDL_BUTTON_WHEELUP:
if (slider_value < slider_maximum) {
slider_value++;
emit(EventSliderChanged, this);
}
return true;
break;
case 512 + SDL_BUTTON_WHEELDOWN:
if (slider_value > slider_minimum) {
slider_value--;
emit(EventSliderChanged, this);
}
return true;
break;
case 512 + SDL_BUTTON_LEFT:
if (slider_maximum > slider_minimum) {
// TODO position hit test
slider_dragging = true;
}
return true;
break;
default:
break;
}
return false;
}
bool Slider::on_keyrelease(const int key, const unsigned int modifier)
{
if (key == 512 + SDL_BUTTON_LEFT) {
slider_dragging = false;
return true;
}
return false;
}
void Slider::on_mousemove(const math::Vector2f &cursor)
{
if ((width() <= 0) || (height() <= 0)) {
return;
}
if (slider_dragging && (slider_maximum > slider_minimum)) {
float x = cursor.x();
math::clamp(x, 2.0f * height(), width() - 2.0f * height());
const float w = (width() - 4.0f * height());
const float s = w / (slider_maximum - slider_minimum);
const float p = x - 2.0f * height();
const float newvalue = slider_minimum + round(p /s);
if (slider_value != newvalue) {
slider_value = newvalue;
emit(EventSliderChanged, this);
}
}
}
void Slider::on_mouseover(const math::Vector2f &cursor)
{
slider_dragging = false;
}
void Slider::show()
{
Widget::show();
resize();
}
void Slider::resize()
{
// note: slider expects width > height
slider_minbutton->set_size(height(), height());
slider_minbutton->set_location(0, 0);
slider_decbutton->set_size(height(), height());
slider_decbutton->set_location(slider_minbutton->right(), 0);
slider_maxbutton->set_size(height(), height());
slider_maxbutton->set_location(width() - slider_maxbutton->width(), 0);
slider_incbutton->set_size(height(), height());
slider_incbutton->set_location(slider_maxbutton->left() - slider_incbutton->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() - 5.0f * height()) * range;
if (slider_dragging) {
Paint::set_color(palette()->highlight());
} else {
Paint::set_color(palette()->foreground());
}
Paint::draw_rectangle(math::Vector2f(global_location().x() + 2.0f * height() + x + 1, global_location().y() +1 ), math::Vector2f(height() - 2, height() - 2));
}
Widget::draw();
}
} // namespace ui
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