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Date Posted: 11:55:54 09/19/03 Fri
Author: Mike Haiss
Subject: Re: Crop Question
In reply to: Mike Haiss 's message, "Re: Crop Question" on 11:18:09 09/19/03 Fri

I feel silly
I had the image zooming to always fit the size of the scrollbox so the following fixed my problem;

TCropTransform *transForm = new TCropTransform;
transForm->CropMode = cmExtractRect;
transForm->Top = Rect.Top / (ImageScrollBox1->ZoomPercent/100);
transForm->Bottom = Rect.Bottom / (ImageScrollBox1->ZoomPercent/100);
transForm->Left = Rect.Left / (ImageScrollBox1->ZoomPercent/100);
transForm->Right = Rect.Right / (ImageScrollBox1->ZoomPercent/100);
delete transForm;

>I have checked the values of Rect and they are
>>Hi Mike,
>>Just from the code it looks fine. The only thing I can
>>see is that sometimes the Rect parameter contains
>>invalid values.
>>Best regards,
>>>Ok, I was wondering if you could explain this.
>>>The following code works on some images and doesn't
>>>others. The ones it does not work on it will crop
>>>right on the second try, but the first crop you
>>>attempt is always wrong. Any ideas?
>>>Code is as follows....
>>>void __fastcall TForm1::ImageScrollBox1QuickSelect(
>>> const TImageScrollBox *Sender, const
>>> *Graphic, const TRect &Rect){
>>> TCropTransform *transForm = new TCropTransform;
>>> transForm->CropMode = cmExtractRect;
>>> transForm->Top = Rect.Top;
>>> transForm->Bottom = Rect.Bottom;
>>> transForm->Left = Rect.Left;
>>> transForm->Right = Rect.Right;
>>> transForm->Apply(ImageScrollBox1->Graphic);
>>> ImageScrollBox1->Redraw(true);
>>> delete transForm;
>>>Thanks for your time.
>>>>Hi Mike,
>>>>You should use the mmSelect mouse mode instead of
>>>>Then when a selection is active you can use,
>>>>(ImageScrollBox.MouseHandler as
>>>>This will give you the coordinates of the selected
>>>>Best regards,
>>>>>I want to crop a tiff image loaded in an
>>>>>ImageScrollBox using the mmQuickSelect mouse mode

>>>>>select the area.
>>>>>Is there an easy way to calculate the number of
>>>>>the Select box/rubberband is from the edge of the
>>>>>Using C++ Builder 5

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