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0006 ** This file is part of the Qt3Support module of the Qt Toolkit.
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0040 ****************************************************************************/
0041 
0042 #ifndef KTL_Q3SCROLLVIEW_H
0043 #define KTL_Q3SCROLLVIEW_H
0044 
0045 #include <QScrollBar>
0046 #include <ktlqt3support/ktlq3frame.h>
0047 
0048 // QT_BEGIN_HEADER
0049 
0050 // QT_BEGIN_NAMESPACE
0051 
0052 // QT_MODULE(Qt3SupportLight)
0053 
0054 class KtlQ3ScrollViewData;
0055 
0056 class KtlQ3ScrollView : public KtlQ3Frame
0057 {
0058     Q_OBJECT
0059     Q_ENUMS(ResizePolicy ScrollBarMode)
0060     Q_PROPERTY(ResizePolicy resizePolicy READ resizePolicy WRITE setResizePolicy)
0061     Q_PROPERTY(ScrollBarMode vScrollBarMode READ vScrollBarMode WRITE setVScrollBarMode)
0062     Q_PROPERTY(ScrollBarMode hScrollBarMode READ hScrollBarMode WRITE setHScrollBarMode)
0063     Q_PROPERTY(int visibleWidth READ visibleWidth)
0064     Q_PROPERTY(int visibleHeight READ visibleHeight)
0065     Q_PROPERTY(int contentsWidth READ contentsWidth)
0066     Q_PROPERTY(int contentsHeight READ contentsHeight)
0067     Q_PROPERTY(int contentsX READ contentsX)
0068     Q_PROPERTY(int contentsY READ contentsY)
0069     Q_PROPERTY(bool dragAutoScroll READ dragAutoScroll WRITE setDragAutoScroll)
0070 
0071 public:
0072     KtlQ3ScrollView(QWidget *parent = nullptr, const char *name = nullptr, Qt::WindowFlags f = {});
0073     ~KtlQ3ScrollView() override;
0074 
0075     enum ResizePolicy { Default, Manual, AutoOne, AutoOneFit };
0076     virtual void setResizePolicy(ResizePolicy);
0077     ResizePolicy resizePolicy() const;
0078 
0079     void styleChange(QStyle &);
0080     void removeChild(QWidget *child);
0081     virtual void addChild(QWidget *child, int x = 0, int y = 0);
0082     virtual void moveChild(QWidget *child, int x, int y);
0083     int childX(QWidget *child);
0084     int childY(QWidget *child);
0085     bool childIsVisible(QWidget *child)
0086     {
0087         return child->isVisible();
0088     } // obsolete functions
0089     void showChild(QWidget *child, bool yes = true)
0090     {
0091         child->setVisible(yes);
0092     }
0093 
0094     enum ScrollBarMode { Auto, AlwaysOff, AlwaysOn };
0095 
0096     ScrollBarMode vScrollBarMode() const;
0097     virtual void setVScrollBarMode(ScrollBarMode);
0098 
0099     ScrollBarMode hScrollBarMode() const;
0100     virtual void setHScrollBarMode(ScrollBarMode);
0101 
0102     QWidget *cornerWidget() const;
0103     virtual void setCornerWidget(QWidget *);
0104 
0105     // ### 4.0: Consider providing a factory function for scrollbars
0106     //          (e.g. make the two following functions virtual)
0107     QScrollBar *horizontalScrollBar() const;
0108     QScrollBar *verticalScrollBar() const;
0109     QWidget *viewport() const;
0110     QWidget *clipper() const;
0111 
0112     int visibleWidth() const;
0113     int visibleHeight() const;
0114 
0115     int contentsWidth() const;
0116     int contentsHeight() const;
0117     int contentsX() const;
0118     int contentsY() const;
0119 
0120     void resize(int w, int h);
0121     void resize(const QSize &);
0122     void setVisible(bool visible) override;
0123 
0124     void updateContents(int x, int y, int w, int h);
0125     void updateContents(const QRect &r);
0126     void updateContents();
0127     void repaintContents(int x, int y, int w, int h, bool erase = true);
0128     void repaintContents(const QRect &r, bool erase = true);
0129     void repaintContents(bool erase = true);
0130     void contentsToViewport(int x, int y, int &vx, int &vy) const;
0131     void viewportToContents(int vx, int vy, int &x, int &y) const;
0132     QPoint contentsToViewport(const QPoint &) const;
0133     QPoint viewportToContents(const QPoint &) const;
0134     void enableClipper(bool y);
0135 
0136     void setStaticBackground(bool y);
0137     bool hasStaticBackground() const;
0138 
0139     QSize viewportSize(int, int) const;
0140     QSize sizeHint() const override;
0141     QSize minimumSizeHint() const override;
0142 
0143     void removeChild(QObject *child);
0144 
0145     bool isHorizontalSliderPressed();
0146     bool isVerticalSliderPressed();
0147 
0148     virtual void setDragAutoScroll(bool b);
0149     bool dragAutoScroll() const;
0150 
0151 Q_SIGNALS:
0152     void contentsMoving(int x, int y);
0153     void horizontalSliderPressed();
0154     void horizontalSliderReleased();
0155     void verticalSliderPressed();
0156     void verticalSliderReleased();
0157 
0158 public Q_SLOTS:
0159     virtual void resizeContents(int w, int h);
0160     void scrollBy(int dx, int dy);
0161     virtual void setContentsPos(int x, int y);
0162     void ensureVisible(int x, int y);
0163     void ensureVisible(int x, int y, int xmargin, int ymargin);
0164     void center(int x, int y);
0165     void center(int x, int y, float xmargin, float ymargin);
0166 
0167     void updateScrollBars(); // ### virtual in 4.0
0168     void setEnabled(bool enable);
0169 
0170 protected:
0171     virtual void drawContents(QPainter *, int cx, int cy, int cw, int ch);
0172     virtual void drawContentsOffset(QPainter *, int ox, int oy, int cx, int cy, int cw, int ch);
0173 
0174     virtual void contentsMousePressEvent(QMouseEvent *);
0175     virtual void contentsMouseReleaseEvent(QMouseEvent *);
0176     virtual void contentsMouseDoubleClickEvent(QMouseEvent *);
0177     virtual void contentsMouseMoveEvent(QMouseEvent *);
0178     virtual void contentsDragEnterEvent(QDragEnterEvent *);
0179     virtual void contentsDragMoveEvent(QDragMoveEvent *);
0180     virtual void contentsDragLeaveEvent(QDragLeaveEvent *);
0181     virtual void contentsDropEvent(QDropEvent *);
0182     virtual void contentsWheelEvent(QWheelEvent *);
0183     virtual void contentsContextMenuEvent(QContextMenuEvent *);
0184 
0185     virtual void viewportPaintEvent(QPaintEvent *);
0186     virtual void viewportResizeEvent(QResizeEvent *);
0187     virtual void viewportMousePressEvent(QMouseEvent *);
0188     virtual void viewportMouseReleaseEvent(QMouseEvent *);
0189     virtual void viewportMouseDoubleClickEvent(QMouseEvent *);
0190     virtual void viewportMouseMoveEvent(QMouseEvent *);
0191     virtual void viewportDragEnterEvent(QDragEnterEvent *);
0192     virtual void viewportDragMoveEvent(QDragMoveEvent *);
0193     virtual void viewportDragLeaveEvent(QDragLeaveEvent *);
0194     virtual void viewportDropEvent(QDropEvent *);
0195     virtual void viewportWheelEvent(QWheelEvent *);
0196     virtual void viewportContextMenuEvent(QContextMenuEvent *);
0197 
0198     void frameChanged() override;
0199 
0200 public:
0201     virtual void setMargins(int left, int top, int right, int bottom);
0202     int leftMargin() const;
0203     int topMargin() const;
0204     int rightMargin() const;
0205     int bottomMargin() const;
0206 
0207 protected:
0208     bool focusNextPrevChild(bool next) override;
0209 
0210     virtual void setHBarGeometry(QScrollBar &hbar, int x, int y, int w, int h);
0211     virtual void setVBarGeometry(QScrollBar &vbar, int x, int y, int w, int h);
0212 
0213     void resizeEvent(QResizeEvent *) override;
0214     void mousePressEvent(QMouseEvent *) override;
0215     void mouseReleaseEvent(QMouseEvent *) override;
0216     void mouseDoubleClickEvent(QMouseEvent *) override;
0217     void mouseMoveEvent(QMouseEvent *) override;
0218     void wheelEvent(QWheelEvent *) override;
0219     void contextMenuEvent(QContextMenuEvent *) override;
0220     bool eventFilter(QObject *, QEvent *e) override;
0221 
0222     void setCachedSizeHint(const QSize &sh) const;
0223     QSize cachedSizeHint() const;
0224     void fontChange(const QFont &);
0225 
0226 private:
0227     void drawContents(QPainter *) override;
0228     void moveContents(int x, int y);
0229 
0230     KtlQ3ScrollViewData *d;
0231 
0232 private Q_SLOTS:
0233     void hslide(int);
0234     void vslide(int);
0235     void hbarIsPressed();
0236     void hbarIsReleased();
0237     void vbarIsPressed();
0238     void vbarIsReleased();
0239     void doDragAutoScroll();
0240     void startDragAutoScroll();
0241     void stopDragAutoScroll();
0242 
0243 private: // Disabled copy constructor and operator=
0244     Q_DISABLE_COPY(KtlQ3ScrollView)
0245     void changeFrameRect(const QRect &);
0246 
0247 public:
0248     void disableSizeHintCaching();
0249 };
0250 
0251 class KtlQAbstractScrollAreaWidget : public QWidget
0252 {
0253     Q_OBJECT
0254 
0255 public:
0256     KtlQAbstractScrollAreaWidget(KtlQ3ScrollView *parent = nullptr, const char *name = nullptr, Qt::WindowFlags f = {})
0257         : QWidget(parent, f)
0258     {
0259         setObjectName(name);
0260         setAutoFillBackground(true);
0261     }
0262 };
0263 
0264 class KtlQClipperWidget : public QWidget
0265 {
0266     Q_OBJECT
0267 
0268 public:
0269     KtlQClipperWidget(QWidget *parent = nullptr, const char *name = nullptr, Qt::WindowFlags f = {})
0270         : QWidget(parent, f)
0271     {
0272         setObjectName(name);
0273     }
0274 };
0275 
0276 // QT_END_NAMESPACE
0277 
0278 // QT_END_HEADER
0279 
0280 #endif // KTL_Q3SCROLLVIEW_H