| image = variable holding the image's file handle |
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It is occasionally useful to determine the location of an image's image handle. This command returns the Y coordinate. Use ImageXHandle to get the X coordinate. Please see MidHandle for more information on the image's image handle.
Note about the term 'handle'. There are two types of 'handles' we discuss in these documents. One is the location within an image - as discussed in this command. The other is a 'file handle', a variable used to hold an image, sound, or font loaded with a command. See LoadImage for more information about file handles. |
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; MidHandle/ImageXHandle()/ImageYHandle()/AutoMidHandle
; Initiate Graphics Mode Graphics 640,480,16 ; Set up the image file handle as a global Global gfxBall ; Load the image - you may need to change the location of the file gfxBall=LoadImage ("C:Program FilesBlitz Basicsamplesall.bmp") ; Until the user presses ESC key ... While Not KeyHit(1) Text 0,0,"Default Image Handle for gfxBall... Press ESC ..." Text 0,14,"X handle-" + ImageXHandle(gfxBall) ; Print the location of the image handle x location Text 0,28,"Y handle-" + ImageYHandle(gfxBall) ; Print the location of the image handle y location DrawImage gfxBall,200,200,0 ; draw the image at 200,200 Wend ; Clear the screen Cls ; Set the ball's handle to the center of the image MidHandle gfxBall ; Until the user presses ESC key ... show the new information While Not KeyHit(1) Text 0,0,"New Image Handle for gfxBall... Press ESC ..." Text 0,14,"X handle-" + ImageXHandle(gfxBall) Text 0,28,"Y handle-" + ImageYHandle(gfxBall) DrawImage gfxBall,200,200,0 Wend ; Makes all images load up with their handles in the center of the image AutoMidHandle True Cls ; Load the image again gfxBall=LoadImage ("C:Program FilesBlitz Basicsamplesall.bmp") ; Until the user presses ESC key ... show the new information While Not KeyHit(1) Text 0,0,"Automatic image handle of gfxBall... Press ESC ..." Text 0,14,"X handle-" + ImageXHandle(gfxBall) Text 0,28,"Y handle-" + ImageYHandle(gfxBall) DrawImage gfxBall,200,200,0 Wend |