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Appendix A: QLISTBOX
Rapid-Q Documentation by William Yu (c)1999-2000 Appendix A: QLISTBOX


QLISTBOX Component

QListbox implements a generic (veritcal scrolling) Windows listbox. The first item in any listbox is 0, the next is 1, and so on...

QListbox Properties
FieldTypeR/WDefaultSupport





AlignINTEGERRWalNoneW
Align determines how the control aligns within its parent control.
BorderStyleINTEGERRWbsSingleW
ColorINTEGERRWWX
ColumnsINTEGERRW0W
Columns specifies the number of columns, in a multi-column listbox, that are visible without having to scroll.
CopyModeINTEGERRWcmBlacknessW
CursorINTEGERRWcrDefaultW
EnabledINTEGERRWTrueWXG
ExtendedSelectINTEGERRWTrueWX
ExtendedSelect determines if the user can select a sequential range of items in the listbox.
FontQFONTWW
HeightINTEGERRWWXG
HintSTRINGRWWXG
ItemARRAY of STRINGRWWXG
Item contains the strings that appear in the listbox.
ItemCountINTEGERRWXG
ItemHeightINTEGERRWW
ItemIndexINTEGERRWWXG
LeftINTEGERRW0WXG
MultiSelectINTEGERRWFalseWX
ParentQFORM/QPANEL/QTABCONTROLWWXG
PopupMenuQPOPUPMENUWW
SelCountINTEGERRW
SelectedARRAY of INTEGERRWWX
ShowHintINTEGERRWFalseWXG
SortedINTEGERRWFalseWG
Sorted specifies whether the items in a listbox are arranged alphabetically.
StyleINTEGERRWlbStandardW
Style determines whether the listbox is standard or owner-draw.
0 = lbStandard -- All items are strings, with each item the same height.
1 = lbOwnerDrawFixed -- Each item in the listbox is the height specified by the ItemHeight property.
2 = lbOwnerDrawVariable -- Items in the listbox can be of varying heights.
TabOrderINTEGERRWW
TabWidthINTEGERRW0W
TagINTEGERRWWXG
TextSTRINGRWW
Text defines the items in the listbox as CRLF terminated strings.
TopINTEGERRW0WXG
TopIndexINTEGERRWW
VisibleINTEGERRWTrueWXG
WidthINTEGERRWWXG

QListbox Methods
MethodTypeDescriptionParamsSupport





AddItemsSUBIAdd items to listboxSTRINGs, InfiniteWXG
CircleSUB (x1%, y1%, x2%, y2%, c%, fill%)Draw & Fill Circle6W
ClearSUBClears entire listbox0WXG
CopyRectSUB (D, Image, S)D and S are QRECTs, Image can be a QImage, QCanvas, or QBitmap3W
DelItemsSUBIDelete items by their indexIndex #s, InfiniteWXG
DrawSUB (x%, y%, BMP)Draw Bitmap at (X,Y)3W
FillRectSUB (x1%, y1%, x2%, y2%, c%)Draws & Fills a rectangle5W
InsertItemSUB (Index%, String$)Insert item at Index%2WXG
LineSUB (x1%, y1%, x2%, y2%, c%)Draws a line5W
LoadFromFileSUB (FileName AS STRING)Load file to list1W
PaintSUB (x%, y%, c%, borderc%)Fill Region4W
PsetSUB (x%, y%, c%)Pixel plot3W
RectangleSUB (x1%, y1%, x2%, y2%, c%)Draws a rectangle5W
RepaintSUBForce repainting of listbox0W
RoundRectSUB (x1%, y1%, x2%, y2%, x3%, y3%, c%)Draws & Fills a rounded rectangle7W
SaveToFileSUB (FileName AS STRING)Save list to file1W
StretchDrawSUB (Rect AS QRECT, BMP)Draw BMP and stretch to fit inside Rect2W
TextHeightFUNCTION (Text$) AS WORDReturns the height, in pixels, of Text$ string1W
TextWidthFUNCTION (Text$) AS WORDReturns the width, in pixels, of Text$ string1W
TextRectSUB (Rect AS QRECT, x%, y%, S$, fc%, bc%)Write text, and clip within region Rect6W
TextOutSUB (x%, y%, S$, fc%, bc%)Writes text to image5W

QListbox Events
EventTypeOccurs when...ParamsSupport





OnClickVOIDUser clicks on item0WXG
OnDblClickVOIDUser double clicks on an item0WXG
OnDrawItemSUB (Index%, State%, R AS QRect)Items are redrawn for ownerdraw listboxes3W
OnEnterVOIDUser presses enter to select item0W
OnMeasureItemSUB (Index%, Height%)Calculate Height for ownerdraw variable listboxes3W
WndProcSUB (Hwnd%, Msg%, wParam%, lParam%)Messages sent to Listbox4W


QListbox Examples
  DIM Form AS QForm
  DIM ListBox AS QListBox

  ListBox.Parent = Form
  ListBox.AddItems "1. Apples", "2. Oranges", "3. Bananas"
  ListBox.DelItems 1,2       '' Deletes Oranges and Bananas
 
  ListBox.Item(0) = "1. Strawberries"   '-- Change the first item

  Form.ShowModal

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