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9b71307d49
This patch also adds a Format concept to GraphicsBitmap. For now there are only two formats: RGB32 and RGBA32. Windows with alpha channel have their backing stores created in the RGBA32 format. Use this to make Terminal windows semi-transparent for that comfy rice look. There is one problem here, in that window compositing overdraw incurs multiple passes of blending of the same pixels. This leads to a mismatch in opacity which is obviously not good. I will work on this in a later patch. The alpha blending is currently straight C++. It should be relatively easy to optimize this using SSE instructions. For now I'm just happy with the cute effect. :^)
91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
#include "GButton.h"
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#include <SharedGraphics/Painter.h>
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#include <LibGUI/GStyle.h>
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//#define GBUTTON_DEBUG
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GButton::GButton(GWidget* parent)
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: GWidget(parent)
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{
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set_fill_with_background_color(false);
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}
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GButton::~GButton()
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{
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}
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void GButton::set_caption(String&& caption)
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{
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if (caption == m_caption)
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return;
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m_caption = move(caption);
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update();
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}
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void GButton::paint_event(GPaintEvent&)
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{
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Painter painter(*this);
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GStyle::the().paint_button(painter, rect(), m_being_pressed);
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if (!caption().is_empty() || m_icon) {
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auto content_rect = rect();
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auto icon_location = m_icon ? content_rect.center().translated(-(m_icon->width() / 2), -(m_icon->height() / 2)) : Point();
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if (m_being_pressed) {
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content_rect.move_by(1, 1);
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icon_location.move_by(1, 1);
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}
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if (m_icon) {
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painter.blit(icon_location, *m_icon, m_icon->rect());
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painter.draw_text(content_rect, caption(), TextAlignment::Center, Color::Black);
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} else {
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painter.draw_text(content_rect, caption(), TextAlignment::Center, Color::Black);
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}
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}
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}
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void GButton::mousemove_event(GMouseEvent& event)
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{
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if (m_tracking_cursor) {
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bool being_pressed = rect().contains(event.position());
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if (being_pressed != m_being_pressed) {
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m_being_pressed = being_pressed;
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update();
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}
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}
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GWidget::mousemove_event(event);
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}
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void GButton::mousedown_event(GMouseEvent& event)
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{
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#ifdef GBUTTON_DEBUG
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dbgprintf("GButton::mouse_down_event: x=%d, y=%d, button=%u\n", event.x(), event.y(), (unsigned)event.button());
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#endif
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if (event.button() == GMouseButton::Left) {
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m_being_pressed = true;
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m_tracking_cursor = true;
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set_global_cursor_tracking(true);
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update();
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}
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GWidget::mousedown_event(event);
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}
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void GButton::mouseup_event(GMouseEvent& event)
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{
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#ifdef GBUTTON_DEBUG
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dbgprintf("GButton::mouse_up_event: x=%d, y=%d, button=%u\n", event.x(), event.y(), (unsigned)event.button());
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#endif
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if (event.button() == GMouseButton::Left) {
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bool was_being_pressed = m_being_pressed;
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m_being_pressed = false;
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m_tracking_cursor = false;
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set_global_cursor_tracking(false);
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update();
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if (was_being_pressed) {
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if (on_click)
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on_click(*this);
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}
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}
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GWidget::mouseup_event(event);
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}
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