Border size around proportional images

Matt,
The following is from the calculations used by the Paint procedure in TImage. This will let you get both the Rect for the control as well as the image.

Hope this helps,
Russell

// Assuming a control called Image1
var  rcImage:    TRect;
     rcCtl:      TRect;
begin

  // Get the control rectangle
  rcCtl:=Rect(0, 0, Image1.Width, Image1.Height);

  // Get the actual image rect
  with Image1 do
  begin
     if Stretch then
        rcImage:=rcCtl
     else if Center then
        rcImage:=Bounds((Width - Picture.Width) div 2, (Height - Picture.Height) div 2, Picture.Width, Picture.Height)
     else
        rcImage:=Rect(0, 0, Picture.Width, Picture.Height);
  end;

 // Do whatever with the rects

end;

Russell,

The picture displayed within Image1 is Streched, Centred and Proportional. As a result the above code does not seem to give me the left, right and top,bottom border size around the image.

var
        leftBorder: integer;
        rightBorder: integer;
        topBorder: integer;
        bottomBorder: integer;

begin
       Image1.AutoSize := True;
       Image1.Centre := True;
       Image1.Proportional := True;
       Image1.Picture := 'c:\test.bmp';

       . . .
       leftBorder := rcImage.Left;
       bottomBorder := rcImage.Bottom;
       . . .


... Any thoughts?

Many thanks in advance.

Matt,

What version of delphi are you working with? Looking at D5, there is no "Proportional" setting, just the strecth and center; in which case the stretch overrides the center value (and the image is stretched to the dimensions of the control, leaving no border).

Russell

Russell,

I'm using Delphi 6, and need to know the border sizes around the image when the image is proportional.

Matt

i think you want to have the information what the stretch property of the timage has done.

for this you should load the image with autosize := true and  proportional and stretch  := false;
now you know how big the original is.
if you save these values and compare them to the proportional := true image you should
know how big your border is.

regards
alfred

Apologies, DanRollins.

Unfortunetly, no one managed to supply the answer I was looking for, and I managed to figure it out by calculating the image scaling myself. I'll post the code I used on here shortly.

Many thanks to all that attempted to help.

View the image scaling in action:
http://web.ukonline.co.uk/mattbriggs

OK,

As promised, here is the code I used:

---

Ratio := imgsolution.picture.Width / imgsolution.picture.Height;
AWidth := Round(image1.Height * Ratio);
AHeight := Round(image1.Width / Ratio);
lborder := (round((image1.Width - AWidth) / 2));
tborder := (round((image1.Height - AHeight) / 2));
if (lborder < 0) then
     lborder:=0;
if (tborder < 0) then
     tborder:=0;

---

Play Matt's 15-1 Puzzle Game:
http://web.ukonline.co.uk/mattbriggs