File indexing completed on 2024-03-03 04:14:06

0001 /*
0002     This file is part of the KDE games lskat program
0003     SPDX-FileCopyrightText: 2006 Martin Heni <kde@heni-online.de>
0004 
0005     SPDX-License-Identifier: LGPL-2.0-or-later
0006 */
0007 
0008 #ifndef LSKAT_GAMEVIEW_H
0009 #define LSKAT_GAMEVIEW_H
0010 
0011 // Qt includes
0012 #include <QElapsedTimer>
0013 #include <QGraphicsScene>
0014 #include <QGraphicsSceneMouseEvent>
0015 #include <QGraphicsTextItem>
0016 #include <QGraphicsView>
0017 #include <QList>
0018 #include <QPoint>
0019 #include <QResizeEvent>
0020 #include <QSize>
0021 #include <QWidget>
0022 
0023 // Forward declaration
0024 class ThemeManager;
0025 
0026 /**
0027  * The view object which shows the graphics in a
0028  * Qt graphics view.
0029  */
0030 class GameView : public QGraphicsView
0031 {
0032     Q_OBJECT
0033 
0034 public:
0035     /**
0036      * Constructor for the canvas view.
0037      * @param size The canvas fixed size
0038      * @param advancePeriod The canvas advance period
0039      * @param scene The graphics scene
0040      * @param theme The theme manager
0041      * @param parent The parent window
0042      */
0043     GameView(const QSize &size, int advancePeriod, QGraphicsScene *scene, ThemeManager *theme, QWidget *parent = nullptr);
0044 
0045     /**
0046      * Destructor.
0047      */
0048     ~GameView() override;
0049 
0050 protected:
0051     /**
0052      * React to mouse clicks.
0053      * @param event The mouse event
0054      */
0055     void mouseReleaseEvent(QMouseEvent *event) override;
0056 
0057 public Q_SLOTS:
0058     /**
0059      * The update and advance for the canvas.
0060      * This is called by a timer at regular intervals.
0061      */
0062     void updateAndAdvance();
0063 
0064     /**
0065      * Rescale the theme (update theme SVG graphics).
0066      */
0067     void rescaleTheme();
0068 
0069 Q_SIGNALS:
0070     /**
0071      * Emit the signal on mouse clicks.
0072      * @param point The mouse coordinate.
0073      */
0074     void signalLeftMousePress(QPoint point);
0075 
0076 protected:
0077     /**
0078      * Will be called by the Qt View when its contents are resized.
0079      * We adapt the canvas then.
0080      * @param e The resize event
0081      */
0082     void resizeEvent(QResizeEvent *e) override;
0083 
0084     /**
0085      * Paint function for the widget, temporary fix while we wait for QGV 4.3
0086      * @param event The paint event
0087      */
0088     void paintEvent(QPaintEvent *event) override;
0089 
0090     /**
0091      * Overwritten Qt function.
0092      */
0093     void drawItems(QPainter *painter, int numItems, QGraphicsItem *items[], const QStyleOptionGraphicsItem options[]) override;
0094 
0095 private:
0096     // Theme manager
0097     ThemeManager *mTheme;
0098     // Theme queue
0099     QList<int> mThemeQueue;
0100     // Theme offset queue
0101     QList<QPoint> mThemeOffset;
0102     // Active input offset
0103     QPoint mInputOffset;
0104     // Theme queue delay time [ms]
0105     QElapsedTimer mTimeStart;
0106     // Debug frame rate sprite
0107     QGraphicsTextItem *mFrameSprite;
0108     // Time between updates
0109     int mDisplayUpdateTime;
0110     // Average update times
0111     QList<int> mDrawTimes;
0112 };
0113 
0114 #endif // LSKAT_GAMEVIEW_H