clear tImage

[Natter]

Hi all !
I created image

oIm:=tImage():New()
oIm:LoadBmp(cFile)

I want delete BMP from oIm. How do it ?

[StefanHaupt]

Natter,

if you want to change the image just load load a new one
oIM:SetBmp(cResName) or oIM:ReLoad( cResName, cBmpFile )

if you want to delete the bmp you can destroy the object, just write oIM := nil or you try to load an unexisting image (not tested)

[Natter]

... delete the bmp you can destroy the object, just write oIM := nil or you try to load an unexisting image (not tested)"

I do it. It's not work

[ralph]

try this:

oIm:hbitmap := 0
oIm:Refresh()



Ralph

[Natter]

It's not work

[mmercado]

It's not work

May be:

Code: Select all  Expand view

PalBmpFree( oIm:hBitMap, oIm:hPalette )

Regards.

Manuel Mercado.

[Enrico Maria Giordano]

This is a sample:

Code: Select all  Expand view

#include "Fivewin.ch"


FUNCTION MAIN()

    LOCAL oDlg, oImg

    DEFINE DIALOG oDlg;
           SIZE 700, 500

    @ 1, 1 IMAGE oImg;
           FILE "SFONDO.JPG";
           SIZE 200, 200;
           ADJUST

    @ 0,  1 BUTTON "Save";
            ACTION MSGINFO( oImg:SaveImage( "SAVED.JPG", 2 ) )

    @ 0,  7 BUTTON "Print";
            ACTION PRINT( oImg )

    @ 0, 13 BUTTON "Paste";
            ACTION ( oImg:LoadFromClipboard(),;
                     oImg:Refresh() )

    @ 0, 19 BUTTON "Load";
            ACTION ( oImg:LoadImage( , "GRIGIO.JPG" ),;
                     oImg:Refresh() )

    @ 0, 25 BUTTON "Clear";
            ACTION ( PalBmpFree( oImg:hBitMap, oImg:hPalette ),;
                     oImg:hBitmap := 0,;
                     oImg:hPalette := 0,;
                     oImg:cResName := NIL,;
                     oImg:cBmpFile := NIL,;
                     oImg:Refresh() )

    ACTIVATE DIALOG oDlg;
             CENTER

    RETURN NIL


STATIC FUNCTION PRINT( oImg )

    LOCAL oPrn

    PRINT oPrn PREVIEW MODAL
        PAGE
            oPrn:SayImage( 0, 0, oImg, oPrn:nHorzRes(), oPrn:nVertRes() )
        ENDPAGE
    ENDPRINT

    RETURN NIL

EMG

[James Bott]

It looks like the TImage class needs an End() method.

James

[mmercado]

It looks like the TImage class needs an End() method.

Hi James:

It has. TImage is a TBitmap subclass, then inherits Destroy Method.

Best regards.

Manuel Mercado

[Natter]

Thank everybody !

@ 0, 25 BUTTON "Clear";
ACTION oImg:hBitmap := 0, ;
oImg:cBmpFile := NIL,;
oImg:Refresh() )

It work right !

[James Bott]

It has. TImage is a TBitmap subclass, then inherits Destroy Method.

It is not clear if we should call the Destroy() method or the End() method. I see that TBitmap inherits from TControl which inherits from TWindow, yet I do not see the Destroy() method being called by any of those classes' End() method.

To be consistant with all the other classes, the End() method should be the one that ends the object.

James

[James Bott]

Natter,

Try calling oImg:End() or oImg:Destroy() to see if one of those also works.

James

[Natter]

1) calling oImg:End() - this method deleted control
2) calling oImg:Destroy() - this method not work right.

[Enrico Maria Giordano]

Thank everybody !

@ 0, 25 BUTTON "Clear";
ACTION oImg:hBitmap := 0, ;
oImg:cBmpFile := NIL,;
oImg:Refresh() )

It work right !

It's not enough. Please use what I put in my sample if you don't want to have resource leak.

EMG