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#include <LibGUI/GProgressBar.h>
#include <SharedGraphics/Painter.h>
#include <AK/StringBuilder.h>
GProgressBar::GProgressBar(GWidget* parent)
: GWidget(parent)
{
}
GProgressBar::~GProgressBar()
{
}
void GProgressBar::set_value(int value)
{
if (m_value == value)
return;
m_value = value;
update();
}
void GProgressBar::set_range(int min, int max)
{
ASSERT(min < max);
m_min = min;
m_max = max;
if (m_value > m_max)
m_value = m_max;
if (m_value < m_min)
m_value = m_min;
}
void GProgressBar::paint_event(GPaintEvent& event)
{
Painter painter(*this);
painter.set_clip_rect(event.rect());
// First we fill the entire widget with the gradient. This incurs a bit of
// overdraw but ensures a consistent look throughout the progression.
Color start_color(110, 34, 9);
Color end_color(244, 202, 158);
painter.fill_rect_with_gradient(rect(), start_color, end_color);
float range_size = m_max - m_min;
float progress = (m_value - m_min) / range_size;
// Then we draw the progress text over the gradient.
// We draw it twice, once offset (1, 1) for a drop shadow look.
StringBuilder builder;
builder.append(m_caption);
if (m_format == Format::Percentage)
builder.appendf("%d%%", (int)(progress * 100));
else if (m_format == Format::ValueSlashMax)
builder.appendf("%d/%d", m_value, m_max);
auto progress_text = builder.to_string();
painter.draw_text(rect().translated(1, 1), progress_text, TextAlignment::Center, Color::Black);
painter.draw_text(rect(), progress_text, TextAlignment::Center, Color::White);
// Then we carve out a hole in the remaining part of the widget.
// We draw the text a third time, clipped and inverse, for sharp contrast.
painter.save();
float progress_width = progress * width();
Rect hole_rect { (int)progress_width, 0, (int)(width() - progress_width), height() };
painter.set_clip_rect(hole_rect);
painter.fill_rect(hole_rect, Color::White);
painter.draw_text(rect().translated(0, 0), progress_text, TextAlignment::Center, Color::Black);
painter.restore();
// Finally, draw a frame around the widget.
painter.draw_rect(rect(), Color::Black);
}
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