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61af9d882e
This enables rendering of mixed-scale screen layouts with e.g. high resolution cursors and window button icons on high-dpi screens while using lower resolution bitmaps on regular screens.
132 lines
3.9 KiB
C++
132 lines
3.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGfx/CharacterBitmap.h>
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#include <LibGfx/Painter.h>
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#include <LibGfx/StylePainter.h>
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#include <WindowServer/Button.h>
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#include <WindowServer/Event.h>
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#include <WindowServer/Screen.h>
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#include <WindowServer/WindowManager.h>
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namespace WindowServer {
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Button::Button(WindowFrame& frame, Function<void(Button&)>&& on_click_handler)
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: on_click(move(on_click_handler))
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, m_frame(frame)
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{
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}
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Button::~Button()
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{
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}
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void Button::paint(Screen& screen, Gfx::Painter& painter)
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{
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auto palette = WindowManager::the().palette();
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Gfx::PainterStateSaver saver(painter);
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painter.translate(relative_rect().location());
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Gfx::StylePainter::paint_button(painter, rect(), palette, Gfx::ButtonStyle::Normal, m_pressed, m_hovered);
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if (m_icon) {
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auto& bitmap = m_icon->bitmap(screen.scale_factor());
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auto icon_location = rect().center().translated(-(bitmap.width() / 2), -(bitmap.height() / 2));
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if (m_pressed)
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painter.translate(1, 1);
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painter.blit(icon_location, bitmap, bitmap.rect());
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}
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}
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void Button::on_mouse_event(const MouseEvent& event)
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{
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auto interesting_button = false;
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switch (event.button()) {
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case MouseButton::Left:
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interesting_button = !!on_click;
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break;
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case MouseButton::Middle:
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interesting_button = !!on_middle_click;
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break;
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case MouseButton::Right:
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interesting_button = !!on_right_click;
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break;
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default:
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break;
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}
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if (event.type() != Event::Type::MouseMove && !interesting_button)
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return;
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auto& wm = WindowManager::the();
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if (event.type() == Event::MouseDown && (event.button() == MouseButton::Left || event.button() == MouseButton::Right || event.button() == MouseButton::Middle)) {
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m_pressed = true;
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wm.set_cursor_tracking_button(this);
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m_frame.invalidate(m_relative_rect);
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return;
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}
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if (event.type() == Event::MouseUp && (event.button() == MouseButton::Left || event.button() == MouseButton::Right || event.button() == MouseButton::Middle)) {
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if (wm.cursor_tracking_button() != this)
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return;
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wm.set_cursor_tracking_button(nullptr);
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bool old_pressed = m_pressed;
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m_pressed = false;
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if (rect().contains(event.position())) {
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switch (event.button()) {
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case MouseButton::Left:
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if (on_click)
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on_click(*this);
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break;
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case MouseButton::Right:
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if (on_right_click)
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on_right_click(*this);
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break;
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default:
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if (on_middle_click)
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on_middle_click(*this);
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break;
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}
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}
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if (old_pressed != m_pressed) {
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// Would like to compute:
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// m_hovered = rect_after_action().contains(event.position());
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// However, we don't know that rect yet. We can make an educated
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// guess which also looks okay even when wrong:
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m_hovered = false;
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m_frame.invalidate(m_relative_rect);
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}
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return;
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}
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if (event.type() == Event::MouseMove) {
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bool old_hovered = m_hovered;
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m_hovered = rect().contains(event.position());
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wm.set_hovered_button(m_hovered ? this : nullptr);
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if (old_hovered != m_hovered)
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m_frame.invalidate(m_relative_rect);
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}
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if (event.type() == Event::MouseMove && event.buttons() & (unsigned)MouseButton::Left) {
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if (wm.cursor_tracking_button() != this)
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return;
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bool old_pressed = m_pressed;
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m_pressed = m_hovered;
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if (old_pressed != m_pressed)
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m_frame.invalidate(m_relative_rect);
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}
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}
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Gfx::IntRect Button::screen_rect() const
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{
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return m_relative_rect.translated(m_frame.rect().location());
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}
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}
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