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CursorImageProvider.h
/*
* Copyright (C) 2015 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License version 3, as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranties of MERCHANTABILITY,
* SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CURSORIMAGEPROVIDER_H
#define CURSORIMAGEPROVIDER_H
#include <QQuickImageProvider>
#include <QScopedPointer>
// xcursor static lib
extern "C"
{
#include <xcursor.h>
}
class CursorImage {
public:
virtual ~CursorImage() {}
QImage qimage;
// TODO: consider if there's a need to animate the hotspot
// ie, if there's a need to make it an array of points, one for each frame.
// Maybe no single xcursor (or at least the ones we know of or use)
// vary its hotspot position through its animation.
QPoint hotspot;
int frameWidth{0};
int frameHeight{0};
int frameCount{1};
int frameDuration{40};
// Requested height when creating this cursor.
int requestedHeight{0};
};
class XCursorImage : public CursorImage {
public:
XCursorImage(const QString &theme, const QString &file, int preferredCursorHeightPx);
virtual ~XCursorImage();
};
class BuiltInCursorImage : public CursorImage {
public:
BuiltInCursorImage(int cursorHeight);
};
class BlankCursorImage : public CursorImage {
public:
BlankCursorImage();
};
class CustomCursorImage : public CursorImage {
public:
CustomCursorImage(const QCursor &cursor);
};
class CursorImageProvider : public QQuickImageProvider
{
public:
CursorImageProvider();
virtual ~CursorImageProvider();
static CursorImageProvider *instance() { return m_instance; }
QImage requestImage(const QString &cursorThemeAndNameAndHeight, QSize *size, const QSize &requestedSize) override;
CursorImage *fetchCursor(const QString &themeName, const QString &cursorName, int cursorHeight);
void setCustomCursor(const QCursor &customCursor);
private:
CursorImage *fetchCursor(const QString &cursorThemeAndNameAndHeight);
CursorImage *fetchCursorHelper(const QString &themeName, const QString &cursorName, int cursorHeight);
// themeName -> (cursorName -> cursorImage)
// TODO: discard old, unused, cursors
QMap<QString, QMap<QString, CursorImage*> > m_cursors;
QScopedPointer<CursorImage> m_builtInCursorImage;
BlankCursorImage m_blankCursorImage;
QScopedPointer<CursorImage> m_customCursorImage;
QMap<QString, QStringList> m_fallbackNames;
static CursorImageProvider *m_instance;
};
#endif // CURSORIMAGEPROVIDER_H