don't place NULL pointers in the GDK window array in GTKGetWindow()

[wxWidgets.git] / interface / wx / vscroll.h

diff --git a/interface/wx/vscroll.h b/interface/wx/vscroll.h
index fd087d9d2241241ad72a794f04ffdf88b0bc0539..b7c9b1029a4fad6e440a274765a323008dd9770e 100644 (file)
--- a/interface/wx/vscroll.h
+++ b/interface/wx/vscroll.h
@@ -74,21 +74,6 @@ public:
     */
     void EnablePhysicalScrolling(bool scrolling = true);
 
     */
     void EnablePhysicalScrolling(bool scrolling = true);
 

-    /**
-        When the number of scroll units change, we try to estimate the total
-        size of all units when the full window size is needed (i.e. to
-        calculate the scrollbar thumb size). This is a rather expensive
-        operation in terms of unit access, so if the user code may estimate the
-        average size better or faster than we do, it should override this
-        function to implement its own logic. This function should return the
-        best guess for the total virtual window size.
-
-        @note Although returning a totally wrong value would still work, it
-              risks resulting in very strange scrollbar behaviour so this
-              function should really try to make the best guess possible.
-    */
-    virtual wxCoord EstimateTotalSize() const;
-

     /**
         This function needs to be overridden in the in the derived class to
         return the window size with respect to the opposing orientation. If
     /**
         This function needs to be overridden in the in the derived class to
         return the window size with respect to the opposing orientation. If


@@ -96,13 +81,13 @@ public:
 
         @see GetOrientationTargetSize()
     */
 
         @see GetOrientationTargetSize()
     */

-    virtual int GetNonOrientationTargetSize() const;
+    virtual int GetNonOrientationTargetSize() const = 0;

 
     /**
         This function need to be overridden to return the orientation that this
         helper is working with, either @c wxHORIZONTAL or @c wxVERTICAL.
     */
 
     /**
         This function need to be overridden to return the orientation that this
         helper is working with, either @c wxHORIZONTAL or @c wxVERTICAL.
     */

-    virtual wxOrientation GetOrientation() const;
+    virtual wxOrientation GetOrientation() const = 0;

 
     /**
         This function needs to be overridden in the in the derived class to
 
     /**
         This function needs to be overridden in the in the derived class to


@@ -112,7 +97,7 @@ public:
 
         @see GetNonOrientationTargetSize()
     */
 
         @see GetNonOrientationTargetSize()
     */

-    virtual int GetOrientationTargetSize() const;
+    virtual int GetOrientationTargetSize() const = 0;

 
     /**
         This function will return the target window this helper class is
 
     /**
         This function will return the target window this helper class is


@@ -141,23 +126,6 @@ public:
     */
     bool IsVisible(size_t unit) const;
 
     */
     bool IsVisible(size_t unit) const;
 

-    /**
-        This function doesn't have to be overridden but it may be useful to do
-        so if calculating the units' sizes is a relatively expensive operation
-        as it gives your code a chance to calculate several of them at once and
-        cache the result if necessary.
-
-        OnGetUnitsSizeHint() is normally called just before OnGetUnitSize() but
-        you shouldn't rely on the latter being called for all units in the
-        interval specified here. It is also possible that OnGetUnitSize() will
-        be called for units outside of this interval, so this is really just a
-        hint, not a promise.
-
-        Finally, note that @a unitMin is inclusive, while @a unitMax is
-        exclusive.
-    */
-    virtual void OnGetUnitsSizeHint(size_t unitMin, size_t unitMax) const;
-

     /**
         Recalculate all parameters and repaint all units.
     */
     /**
         Recalculate all parameters and repaint all units.
     */


@@ -188,11 +156,43 @@ public:
 
 protected:
 
 
 protected:
 

+    /**
+        This function doesn't have to be overridden but it may be useful to do
+        so if calculating the units' sizes is a relatively expensive operation
+        as it gives your code a chance to calculate several of them at once and
+        cache the result if necessary.
+
+        OnGetUnitsSizeHint() is normally called just before OnGetUnitSize() but
+        you shouldn't rely on the latter being called for all units in the
+        interval specified here. It is also possible that OnGetUnitSize() will
+        be called for units outside of this interval, so this is really just a
+        hint, not a promise.
+
+        Finally, note that @a unitMin is inclusive, while @a unitMax is
+        exclusive.
+    */
+    virtual void OnGetUnitsSizeHint(size_t unitMin, size_t unitMax) const;
+
+    /**
+        When the number of scroll units change, we try to estimate the total
+        size of all units when the full window size is needed (i.e. to
+        calculate the scrollbar thumb size). This is a rather expensive
+        operation in terms of unit access, so if the user code may estimate the
+        average size better or faster than we do, it should override this
+        function to implement its own logic. This function should return the
+        best guess for the total virtual window size.
+
+        @note Although returning a totally wrong value would still work, it
+              risks resulting in very strange scrollbar behaviour so this
+              function should really try to make the best guess possible.
+    */
+    virtual wxCoord EstimateTotalSize() const;
+

     /**
         This function must be overridden in the derived class, and should
         return the size of the given unit in pixels.
     */
     /**
         This function must be overridden in the derived class, and should
         return the size of the given unit in pixels.
     */

-    virtual wxCoord OnGetUnitSize(size_t unit) const;
+    virtual wxCoord OnGetUnitSize(size_t unit) const = 0;

 };
 
 
 };
 
 


@@ -224,17 +224,6 @@ public:
     */
     wxVarVScrollHelper(wxWindow* winToScroll);
 
     */
     wxVarVScrollHelper(wxWindow* winToScroll);
 

-    /**
-        This class forwards calls from EstimateTotalSize() to this function so
-        derived classes can override either just the height or the width
-        estimation, or just estimate both differently if desired in any
-        wxHVScrolledWindow derived class.
-
-        @note This function will not be called if EstimateTotalSize() is
-              overridden in your derived class.
-    */
-    virtual wxCoord EstimateTotalHeight() const;
-

     /**
         Returns the number of rows the target window contains.
 
     /**
         Returns the number of rows the target window contains.
 


@@ -260,23 +249,6 @@ public:
     */
     bool IsRowVisible(size_t row) const;
 
     */
     bool IsRowVisible(size_t row) const;
 

-    /**
-        This function doesn't have to be overridden but it may be useful to do
-        so if calculating the rows' sizes is a relatively expensive operation
-        as it gives your code a chance to calculate several of them at once and
-        cache the result if necessary.
-
-        OnGetRowsHeightHint() is normally called just before OnGetRowHeight()
-        but you shouldn't rely on the latter being called for all rows in the
-        interval specified here. It is also possible that OnGetRowHeight() will
-        be called for units outside of this interval, so this is really just a
-        hint, not a promise.
-
-        Finally, note that @a rowMin is inclusive, while @a rowMax is
-        exclusive.
-    */
-    virtual void OnGetRowsHeightHint(size_t rowMin, size_t rowMax) const;
-

     /**
         Triggers a refresh for just the given row's area of the window if it's
         visible.
     /**
         Triggers a refresh for just the given row's area of the window if it's
         visible.


@@ -324,11 +296,39 @@ public:
 
 protected:
 
 
 protected:
 

+    /**
+        This function doesn't have to be overridden but it may be useful to do
+        so if calculating the rows' sizes is a relatively expensive operation
+        as it gives your code a chance to calculate several of them at once and
+        cache the result if necessary.
+
+        OnGetRowsHeightHint() is normally called just before OnGetRowHeight()
+        but you shouldn't rely on the latter being called for all rows in the
+        interval specified here. It is also possible that OnGetRowHeight() will
+        be called for units outside of this interval, so this is really just a
+        hint, not a promise.
+
+        Finally, note that @a rowMin is inclusive, while @a rowMax is
+        exclusive.
+    */
+    virtual void OnGetRowsHeightHint(size_t rowMin, size_t rowMax) const;
+
+    /**
+        This class forwards calls from EstimateTotalSize() to this function so
+        derived classes can override either just the height or the width
+        estimation, or just estimate both differently if desired in any
+        wxHVScrolledWindow derived class.
+
+        @note This function will not be called if EstimateTotalSize() is
+              overridden in your derived class.
+    */
+    virtual wxCoord EstimateTotalHeight() const;
+

     /**
         This function must be overridden in the derived class, and should
         return the height of the given row in pixels.
     */
     /**
         This function must be overridden in the derived class, and should
         return the height of the given row in pixels.
     */

-    virtual wxCoord OnGetRowHeight(size_t row) const;
+    virtual wxCoord OnGetRowHeight(size_t row) const = 0;

 };
 
 
 };
 
 


@@ -360,17 +360,6 @@ public:
     */
     wxVarHScrollHelper(wxWindow* winToScroll);
 
     */
     wxVarHScrollHelper(wxWindow* winToScroll);
 

-    /**
-        This class forwards calls from EstimateTotalSize() to this function so
-        derived classes can override either just the height or the width
-        estimation, or just estimate both differently if desired in any
-        wxHVScrolledWindow derived class.
-
-        @note This function will not be called if EstimateTotalSize() is
-              overridden in your derived class.
-    */
-    virtual wxCoord EstimateTotalWidth() const;
-

     /**
         Returns the number of columns the target window contains.
 
     /**
         Returns the number of columns the target window contains.
 


@@ -397,24 +386,6 @@ public:
     */
     bool IsColumnVisible(size_t column) const;
 
     */
     bool IsColumnVisible(size_t column) const;
 

-    /**
-        This function doesn't have to be overridden but it may be useful to do
-        so if calculating the columns' sizes is a relatively expensive
-        operation as it gives your code a chance to calculate several of them
-        at once and cache the result if necessary.
-
-        OnGetColumnsWidthHint() is normally called just before
-        OnGetColumnWidth() but you shouldn't rely on the latter being called
-        for all columns in the interval specified here. It is also possible
-        that OnGetColumnWidth() will be called for units outside of this
-        interval, so this is really just a hint, not a promise.
-
-        Finally, note that @a columnMin is inclusive, while @a columnMax is
-        exclusive.
-    */
-    virtual void OnGetColumnsWidthHint(size_t columnMin,
-                                       size_t columnMax) const;
-

     /**
         Triggers a refresh for just the given column's area of the window if
         it's visible.
     /**
         Triggers a refresh for just the given column's area of the window if
         it's visible.


@@ -462,11 +433,40 @@ public:
 
 protected:
 
 
 protected:
 

+    /**
+        This class forwards calls from EstimateTotalSize() to this function so
+        derived classes can override either just the height or the width
+        estimation, or just estimate both differently if desired in any
+        wxHVScrolledWindow derived class.
+
+        @note This function will not be called if EstimateTotalSize() is
+              overridden in your derived class.
+    */
+    virtual wxCoord EstimateTotalWidth() const;
+
+    /**
+        This function doesn't have to be overridden but it may be useful to do
+        so if calculating the columns' sizes is a relatively expensive
+        operation as it gives your code a chance to calculate several of them
+        at once and cache the result if necessary.
+
+        OnGetColumnsWidthHint() is normally called just before
+        OnGetColumnWidth() but you shouldn't rely on the latter being called
+        for all columns in the interval specified here. It is also possible
+        that OnGetColumnWidth() will be called for units outside of this
+        interval, so this is really just a hint, not a promise.
+
+        Finally, note that @a columnMin is inclusive, while @a columnMax is
+        exclusive.
+    */
+    virtual void OnGetColumnsWidthHint(size_t columnMin,
+                                       size_t columnMax) const;
+

     /**
         This function must be overridden in the derived class, and should
         return the width of the given column in pixels.
     */
     /**
         This function must be overridden in the derived class, and should
         return the width of the given column in pixels.
     */

-    virtual wxCoord OnGetColumnWidth(size_t column) const;
+    virtual wxCoord OnGetColumnWidth(size_t column) const = 0;

 };
 
 
 };
 
 


@@ -629,7 +629,7 @@ public:
     shifted so the first visible row always appears at the point (0, 0) in
     physical as well as logical coordinates.
 
     shifted so the first visible row always appears at the point (0, 0) in
     physical as well as logical coordinates.
 

-    @section wxWidgets 2.8 Compatibility Functions
+    @section vscrolledwindow_compat wxWidgets 2.8 Compatibility Functions

 
     The following functions provide backwards compatibility for applications
     originally built using wxVScrolledWindow in 2.6 or 2.8. Originally,
 
     The following functions provide backwards compatibility for applications
     originally built using wxVScrolledWindow in 2.6 or 2.8. Originally,