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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGfx/CharacterBitmap.h>
#include <LibGfx/Painter.h>
#include <LibGfx/StylePainter.h>
#include <WindowServer/Button.h>
#include <WindowServer/Event.h>
#include <WindowServer/Screen.h>
#include <WindowServer/WindowManager.h>
namespace WindowServer {
Button::Button(WindowFrame& frame, Function<void(Button&)>&& on_click_handler)
: on_click(move(on_click_handler))
, m_frame(frame)
{
}
Button::~Button() = default;
void Button::paint(Screen& screen, Gfx::Painter& painter)
{
auto palette = WindowManager::the().palette();
Gfx::PainterStateSaver saver(painter);
painter.translate(relative_rect().location());
if (m_style == Style::Normal)
Gfx::StylePainter::paint_button(painter, rect(), palette, Gfx::ButtonStyle::Normal, m_pressed, m_hovered);
auto paint_icon = [&](auto& multiscale_bitmap) {
auto& bitmap = multiscale_bitmap->bitmap(screen.scale_factor());
auto icon_location = rect().center().translated(-(bitmap.width() / 2), -(bitmap.height() / 2));
if (m_pressed)
painter.translate(1, 1);
painter.blit(icon_location, bitmap, bitmap.rect());
};
if (m_icon.hover_bitmap && m_hovered)
paint_icon(m_icon.hover_bitmap);
else if (m_icon.bitmap)
paint_icon(m_icon.bitmap);
}
void Button::on_mouse_event(MouseEvent const& event)
{
auto interesting_button = false;
switch (event.button()) {
case MouseButton::Primary:
interesting_button = !!on_click;
break;
case MouseButton::Middle:
interesting_button = !!on_middle_click;
break;
case MouseButton::Secondary:
interesting_button = !!on_secondary_click;
break;
default:
break;
}
if (event.type() != Event::Type::MouseMove && !interesting_button)
return;
auto& wm = WindowManager::the();
if (event.type() == Event::MouseDown && (event.button() == MouseButton::Primary || event.button() == MouseButton::Secondary || event.button() == MouseButton::Middle)) {
m_pressed = true;
wm.set_cursor_tracking_button(this);
m_frame.invalidate(m_relative_rect);
return;
}
if (event.type() == Event::MouseUp && (event.button() == MouseButton::Primary || event.button() == MouseButton::Secondary || event.button() == MouseButton::Middle)) {
if (wm.cursor_tracking_button() != this)
return;
wm.set_cursor_tracking_button(nullptr);
bool old_pressed = m_pressed;
m_pressed = false;
if (rect().contains(event.position())) {
switch (event.button()) {
case MouseButton::Primary:
if (on_click)
on_click(*this);
break;
case MouseButton::Secondary:
if (on_secondary_click)
on_secondary_click(*this);
break;
default:
if (on_middle_click)
on_middle_click(*this);
break;
}
}
if (old_pressed != m_pressed) {
// Would like to compute:
// m_hovered = rect_after_action().contains(event.position());
// However, we don't know that rect yet. We can make an educated
// guess which also looks okay even when wrong:
m_hovered = false;
m_frame.invalidate(m_relative_rect);
}
return;
}
if (event.type() == Event::MouseMove) {
bool old_hovered = m_hovered;
m_hovered = rect().contains(event.position());
wm.set_hovered_button(m_hovered ? this : nullptr);
if (old_hovered != m_hovered)
m_frame.invalidate(m_relative_rect);
}
if (event.type() == Event::MouseMove && event.buttons() & (unsigned)MouseButton::Primary) {
if (wm.cursor_tracking_button() != this)
return;
bool old_pressed = m_pressed;
m_pressed = m_hovered;
if (old_pressed != m_pressed)
m_frame.invalidate(m_relative_rect);
}
}
Gfx::IntRect Button::screen_rect() const
{
return m_relative_rect.translated(m_frame.rect().location());
}
}
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