// Purpose: interface of wxVarHScrollHelper
// Author: wxWidgets team
// RCS-ID: $Id$
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
/**
*/
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
@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.
*/
- virtual wxOrientation GetOrientation() const;
+ virtual wxOrientation GetOrientation() const = 0;
/**
This function needs to be overridden in the in the derived class to
@see GetNonOrientationTargetSize()
*/
- virtual int GetOrientationTargetSize() const;
+ virtual int GetOrientationTargetSize() const = 0;
/**
This function will return the target window this helper class is
*/
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.
*/
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.
*/
- virtual wxCoord OnGetUnitSize(size_t unit) const;
+ virtual wxCoord OnGetUnitSize(size_t unit) const = 0;
};
*/
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.
*/
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.
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.
*/
- virtual wxCoord OnGetRowHeight(size_t row) const;
+ virtual wxCoord OnGetRowHeight(size_t row) const = 0;
};
*/
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.
*/
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.
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.
*/
- virtual wxCoord OnGetColumnWidth(size_t column) const;
+ virtual wxCoord OnGetColumnWidth(size_t column) const = 0;
};
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,
projects / wxWidgets.git / blobdiff