6abd23ed02
Summary: As is KWin only had 1 Cursor which was a singleton. This made it impossible for us to properly implement the tablet (as in drawing tablets) support and show where we're drawing. This patch makes it possible to have different Cursors in KWin, it makes all the current code still follow the mouse but the tablet can still render a cursor. Test Plan: Tests pass, been using it and works as well as before but with beautiful tablet cursors. Reviewers: #kwin, cblack, davidedmundson Reviewed By: #kwin, cblack, davidedmundson Subscribers: davidedmundson, cblack, kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D28155
117 lines
3.2 KiB
C++
117 lines
3.2 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "wayland_cursor_theme.h"
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#include "cursor.h"
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#include "wayland_server.h"
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#include "screens.h"
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// Qt
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#include <QVector>
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// KWayland
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#include <KWayland/Client/shm_pool.h>
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#include <KWayland/Server/display.h>
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#include <KWayland/Server/output_interface.h>
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// Wayland
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#include <wayland-cursor.h>
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namespace KWin
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{
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WaylandCursorTheme::WaylandCursorTheme(KWayland::Client::ShmPool *shm, QObject *parent)
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: QObject(parent)
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, m_theme(nullptr)
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, m_shm(shm)
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{
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connect(screens(), &Screens::maxScaleChanged, this, &WaylandCursorTheme::loadTheme);
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}
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WaylandCursorTheme::~WaylandCursorTheme()
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{
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destroyTheme();
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}
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void WaylandCursorTheme::loadTheme()
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{
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if (!m_shm->isValid()) {
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return;
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}
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Cursor *c = Cursors::self()->mouse();
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int size = c->themeSize();
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if (size == 0) {
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//set a default size
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size = 24;
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}
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size *= screens()->maxScale();
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auto theme = wl_cursor_theme_load(c->themeName().toUtf8().constData(),
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size, m_shm->shm());
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if (theme) {
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if (!m_theme) {
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// so far the theme had not been created, this means we need to start tracking theme changes
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connect(c, &Cursor::themeChanged, this, &WaylandCursorTheme::loadTheme);
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} else {
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destroyTheme();
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}
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m_theme = theme;
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emit themeChanged();
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}
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}
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void WaylandCursorTheme::destroyTheme()
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{
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if (!m_theme) {
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return;
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}
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wl_cursor_theme_destroy(m_theme);
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m_theme = nullptr;
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}
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wl_cursor_image *WaylandCursorTheme::get(CursorShape shape)
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{
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return get(shape.name());
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}
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wl_cursor_image *WaylandCursorTheme::get(const QByteArray &name)
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{
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if (!m_theme) {
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loadTheme();
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}
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if (!m_theme) {
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// loading cursor failed
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return nullptr;
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}
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wl_cursor *c = wl_cursor_theme_get_cursor(m_theme, name.constData());
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if (!c || c->image_count <= 0) {
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const auto &names = Cursors::self()->mouse()->cursorAlternativeNames(name);
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for (auto it = names.begin(), end = names.end(); it != end; it++) {
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c = wl_cursor_theme_get_cursor(m_theme, (*it).constData());
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if (c && c->image_count > 0) {
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break;
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}
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}
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}
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if (!c || c->image_count <= 0) {
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return nullptr;
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}
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// TODO: who deletes c?
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return c->images[0];
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}
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}
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