it's me and my TImage again

[MechanicalBoy]

Hi All !
I have a problem with my image (img). I create it when i click on (butt1) :

TImage *img;
.
.
.

void __fastcall TForm1::butt1Click(TObject *Sender)
{
if((img = new TImage(this))!=NULL)
{
img->SetBounds(0,0,300,10);
img->Canvas->Brush->Color = clGreen;
img->Canvas->FillRect(Rect(0,0,img->Width,img->Height));
img->InsertControl(img);
img->Visible = true;
}
}

when this function terminates everything is OK. I can see green rectangle on the form [resolution (300x10)]

But when i change it's dimensions (by clicking on butt2):

void __fastcall TForm1::butt2Click(TObject *Sender)
{
img->Width += 100;
img->Height += 100;
img->Canvas->Brush->Color = clGreen;
img->Canvas->FillRect(Rect(0,0,img->Width,img->Height));
img->Refresh();
}

I obtain a green rectangle with resolution (300x10) again.
Why it's dimensions are not changed.

Furthermore i know that img is much larger becouse when i replace

img->Width += 100;
img->Height += 100;

by

img->Width += 1000;
img->Height += 1000;

i see automaticly created form scrollbars and it distinctly points that the image is indeed resized.

I think that problem concerns img->Canvas->FillRect() method.

Thanks in advance for any help !

RafalP

 

[arcbkc]

I am not sure if using the image canvas is a good idea.

You might like to try using:

img->Picture->LoadFromFile("blue.bmp" // You will need create a bmp file.

img->AutoSize=true;

also, img->InsertControl(img) MUST BE Form1->InsertControl(img);

Would TShape work better for your program?

Take a look at SetBounds in the C++ builder help files. It say ... Height and Width may not be set...

Hope this helps. Rod

 

[MechanicalBoy]

Thanks for your help arcbkc.
I decided to use TShape in my program. Actually my application is similar to Simulink that works with Matlab.
It is a kind of interface for steering certain machine
Sorry for img->InsertControl(img);
Originally i used this->InsertControl(img); & i tryed to modify code to make it more formal and i discredited myself ))))

Best regards
RafalP