Public Member Functions
|Call this constructor for embeded scrollbar say in a window. |
|char *||GetClass ()|
|GScrollBar (int id, int x, int y, int cx, int cy, char *name)|
|Call this constructor for a control based scrollbar, say in a dialog. |
|True if vertical. |
|void||SetVertical (bool v)|
|Makes the scrollar vertical. |
|Gets the current position of the scrollbar. |
|void||Value (int64 p)|
|Sets the position of the scrollbar. |
|void||Limits (int64 &Low, int64 &High)|
|Gets the limits. |
|void||SetLimits (int64 Low, int64 High)|
|Sets the limits. |
|Gets the page size. |
|void||SetPage (int p)|
|Sets the page size. |
|Returns true if the range is valid. |
|bool||Attach (GViewI *p)|
|Attaches the view to a parent view. |
|void||OnPaint (GSurface *pDC)|
|Called to paint the onscreen representation of the view. |
|Called when the view position changes. |
|void||OnMouseClick (GMouse &m)|
|The mouse was clicked over this view. |
|void||OnMouseMove (GMouse &m)|
|The mouse moves over the control. |
|bool||OnKey (GKey &k)|
|A key was pressed while this view has focus. |
|void||OnMouseWheel (double Lines)|
|The mouse wheel was scrolled. |
|Called every so often by the timer system. |
|int||OnEvent (GMessage *Msg)|
|Called to process every message received by this window. |
|virtual void||OnChange (int Pos)|
|Called when the value changes. |
|virtual void||OnConfigure ()|
|Called when the Limits or Page changes. |
Static Public Member Functions
|static int||GetScrollSize ()|
|Returns the size of the bar, i.e. the width if vertical or the height if horizontal. |
This control can be used as an actual free standing window or to address built in controls on a GLayout view.
|bool GScrollBar::Attach||(||GViewI *||p||)||
Attaches the view to a parent view.
Each GView starts in an un-attached state. When you attach it to a Parent GView the view gains a OS-specific handle and becomes visible on the screen (if the Visible() property is TRUE). However if a view is inserted into the Children list of a GView and it's parent pointer is set correctly it will still paint on the screen without the OS knowing about it. This is known in Lgi as a "virtual window" and is primarily used to cut down on windowing resources. Mouse clicks are handled by the parent window and passed down to the virtual children. Virtual children are somewhat limited. They can't receive focus, or participate in drag and drop operations. If you want to see an example have a look at the GToolBar code.
Reimplemented from GView.
The class' name. Should be overriden in child classes to return the right class name. Mostly used for debugging, but in the win32 port it is also the default WIN32 class name passed to RegisterClass() in GView::CreateClass().
Reimplemented from GView.