Desktop Application Object - CreateBitmap Method
Create an instance of a bitmap (Prim_bmp)
Member of Desktop Application Object (PRIM_APPL)
Parameters
Name |
Type |
Data Type |
Description |
Result |
*Result (Optional) |
Reference to the new bitmap instance |
|
FileName |
*Input (Optional) |
String |
File to be used |
Exists |
*Output (Optional) |
Boolean |
Returns true if the path specified is valid |
Details
The CreateBitmap method is used to create an instance of a Bitmap.
If executing in the browser, the actual load of a bitmap is asynchronous. The Loaded event can be used to determine when this is complete.
Creating and loading bitmap instances is typically used when selecting files to be shown.
Example
In this example, a file is loaded via the file picker. The resulting file is stored in a BLOB field xDemoBlob and the Bitmap instance is used in an Image control.
Begin_Com Role(*EXTENDS #PRIM_WEB) Layoutmanager(#TableLayout1) Theme(#SYS_THEME<2015DeepOrange>)
Define_Com Class(#PRIM_TBLO) Name(#TableLayout1)
Define_Com Class(#PRIM_TBLO.Column) Name(#Column1) Displayposition(1) Parent(#TableLayout1) Width(185) Units(Pixels)
Define_Com Class(#PRIM_TBLO.Column) Name(#Column2) Displayposition(2) Parent(#TableLayout1) Width(1.7)
Define_Com Class(#PRIM_TBLO.Row) Name(#Row1) Displayposition(1) Parent(#TableLayout1)
Define_Com Class(#PRIM_TBLO.Item) Name(#FilePicker1Item1) Alignment(TopCenter) Column(#Column1) Manage(#FilePicker) Parent(#TableLayout1) Row(#Row1) Sizing(None) Margintop(6)
Define_Com Class(#PRIM_TBLO.Item) Name(#Image1Item1) Column(#Column2) Manage(#Image) Parent(#TableLayout1) Row(#Row1) Margintop(6) Marginright(6) Marginbottom(6) Marginleft(6)
Define_Com Class(#PRIM_TBLO.Item) Name(#Label1Item1) Alignment(BottomCenter) Column(#Column2) Manage(#Filename) Parent(#TableLayout1) Row(#Row1) Sizing(FitToWidth) Marginbottom(12) Marginright(12) Marginleft(12)
Define_Com Class(#PRIM_WEB.FilePicker) Name(#FilePicker) Displayposition(2) Ellipses(Word) Height(56) Left(8) Parent(#COM_OWNER) Tabposition(1) Tabstop(False) Top(6) Verticalalignment(Center) Width(169) Image(#xImageCamera32) Caption('Select an Image') Marginleft(8) Themedrawstyle('PushButton')
Define_Com Class(#PRIM_IMAG) Name(#Image) Displayposition(3) Left(191) Parent(#COM_OWNER) Tabposition(2) Tabstop(False) Top(6) Height(788) Width(1003)
Define_Com Class(#PRIM_LABL) Name(#Filename) Displayposition(1) Ellipses(Word) Height(55) Left(197) Parent(#COM_OWNER) Tabposition(3) Tabstop(False) Top(733) Verticalalignment(Center) Width(991) Alignment(Center) Themedrawstyle('Heading1')
Evtroutine Handling(#FilePicker.FileSelected) File(#File)
#Image.Image <= #sys_appln.Createbitmap( #File.blob )
#Filename #xDemoblob := #File.blob
Endroutine
End_Com