+ // ctor and dtor
+ wxScrollHelper(wxWindow *winToScroll = (wxWindow *)NULL);
+ void SetWindow(wxWindow *winToScroll);
+ virtual ~wxScrollHelper();
+
+ // configure the scrolling
+ virtual void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
+ int noUnitsX, int noUnitsY,
+ int xPos = 0, int yPos = 0,
+ bool noRefresh = FALSE );
+
+ // scroll to the given (in logical coords) position
+ virtual void Scroll(int x, int y);
+
+ // get/set the page size for this orientation (wxVERTICAL/wxHORIZONTAL)
+ int GetScrollPageSize(int orient) const;
+ void SetScrollPageSize(int orient, int pageSize);
+
+ // get the size of one logical unit in physical ones
+ virtual void GetScrollPixelsPerUnit(int *pixelsPerUnitX,
+ int *pixelsPerUnitY) const;
+
+ // Enable/disable Windows scrolling in either direction. If TRUE, wxWindows
+ // scrolls the canvas and only a bit of the canvas is invalidated; no
+ // Clear() is necessary. If FALSE, the whole canvas is invalidated and a
+ // Clear() is necessary. Disable for when the scroll increment is used to
+ // actually scroll a non-constant distance
+ virtual void EnableScrolling(bool x_scrolling, bool y_scrolling);
+
+ // Get the view start
+ virtual void GetViewStart(int *x, int *y) const;
+
+ // Actual size in pixels when scrolling is taken into account
+ virtual void GetVirtualSize(int *x, int *y) const;
+
+ // Set the scale factor, used in PrepareDC
+ void SetScale(double xs, double ys) { m_scaleX = xs; m_scaleY = ys; }
+ double GetScaleX() const { return m_scaleX; }
+ double GetScaleY() const { return m_scaleY; }
+
+ // translate between scrolled and unscrolled coordinates
+ virtual void CalcScrolledPosition(int x, int y, int *xx, int *yy) const;
+ virtual void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;
+
+ // Adjust the scrollbars
+ virtual void AdjustScrollbars(void);
+
+ // Calculate scroll increment
+ virtual int CalcScrollInc(wxScrollWinEvent& event);
+
+ // Normally the wxScrolledWindow will scroll itself, but in some rare
+ // occasions you might want it to scroll [part of] another window (e.g. a
+ // child of it in order to scroll only a portion the area between the
+ // scrollbars (spreadsheet: only cell area will move).
+ virtual void SetTargetWindow(wxWindow *target);
+ virtual wxWindow *GetTargetWindow() const;
+
+ void SetTargetRect(const wxRect& rect) { m_rectToScroll = rect; }
+ wxRect GetTargetRect() const { return m_rectToScroll; }
+
+ // Override this function to draw the graphic (or just process EVT_PAINT)
+ virtual void OnDraw(wxDC& WXUNUSED(dc)) { }
+
+ // change the DC origin according to the scroll position.
+ virtual void DoPrepareDC(wxDC& dc);
+
+ // are we generating the autoscroll events?
+ bool IsAutoScrolling() const { return m_timerAutoScroll != NULL; }
+
+ // stop generating the scroll events when mouse is held outside the window
+ void StopAutoScrolling();
+
+ // this method can be overridden in a derived class to forbid sending the
+ // auto scroll events - note that unlike StopAutoScrolling() it doesn't
+ // stop the timer, so it will be called repeatedly and will typically
+ // return different values depending on the current mouse position
+ //
+ // the base class version just returns TRUE
+ virtual bool SendAutoScrollEvents(wxScrollWinEvent& event) const;
+
+ // the methods to be called from the window event handlers
+ void HandleOnScroll(wxScrollWinEvent& event);
+ void HandleOnSize(wxSizeEvent& event);
+ void HandleOnPaint(wxPaintEvent& event);
+ void HandleOnChar(wxKeyEvent& event);
+ void HandleOnMouseEnter(wxMouseEvent& event);
+ void HandleOnMouseLeave(wxMouseEvent& event);
+#if wxUSE_MOUSEWHEEL
+ void HandleOnMouseWheel(wxMouseEvent& event);
+#endif // wxUSE_MOUSEWHEEL
+
+protected:
+ // get pointer to our scroll rect if we use it or NULL
+ const wxRect *GetRect() const
+ {
+ return m_rectToScroll.width != 0 ? &m_rectToScroll : NULL;
+ }
+
+ // get the size of the target window
+ wxSize GetTargetSize() const
+ {
+ return m_rectToScroll.width != 0 ? m_rectToScroll.GetSize()
+ : m_targetWindow->GetClientSize();
+ }
+
+ void GetTargetSize(int *w, int *h)
projects / wxWidgets.git / blobdiff