Programming Forums > Application Development > C++

Hektik · Mar 16th, 2005, 9:00 PM

I'm trying to create a simple program to read manga (japanese comics.) I'm pretty much done with the loading images from zip, mouse navigation, etc. The only thing I can't figure out is how to pan the images. Usually, the images are too tall to fit on the screen, so I want to make a function where, when I click and hold the mouse button, the image pans according to the mouse movements. Anyone know how this can be done? Or know of a website that explains it? It's driving me crazy :mad: please help. Thanks.

Hektik · Mar 19th, 2005, 9:14 AM

Bump

tempest · Mar 19th, 2005, 9:18 AM

-itty bump-itty...

kurifu · Mar 19th, 2005, 5:25 PM

Umm, this is a bit more complex of an issue, and if you are not dealing with bitmap files or any other decoded bitmap format than you are going to want to find a rendering/image handling library that will do this for you.

Easiest way, copy the entire image onto a memory "surface" and use BitBlt to copy from that memory surface (which is not drawn to screen) to a memory surface that represents the drawing area on the screen... the BitBlt function in Windows will allow you to copy only fragments of the image and resize the image as well when used correctly.

Mar 16th, 2005, 9:00 PM	#1
Hektik Newbie Join Date: Mar 2005 Posts: 2 Rep Power: 0	Image Panning I'm trying to create a simple program to read manga (japanese comics.) I'm pretty much done with the loading images from zip, mouse navigation, etc. The only thing I can't figure out is how to pan the images. Usually, the images are too tall to fit on the screen, so I want to make a function where, when I click and hold the mouse button, the image pans according to the mouse movements. Anyone know how this can be done? Or know of a website that explains it? It's driving me crazy :mad: please help. Thanks.

Mar 19th, 2005, 9:18 AM	#3
tempest Programming Guru Join Date: Oct 2004 Posts: 1,041 Rep Power: 6	-itty bump-itty... __________________

Mar 19th, 2005, 5:25 PM	#4
kurifu Expert Programmer Join Date: Jul 2004 Location: Halifax, Nova Scotia (Canada) Posts: 784 Rep Power: 5	Umm, this is a bit more complex of an issue, and if you are not dealing with bitmap files or any other decoded bitmap format than you are going to want to find a rendering/image handling library that will do this for you. Easiest way, copy the entire image onto a memory "surface" and use BitBlt to copy from that memory surface (which is not drawn to screen) to a memory surface that represents the drawing area on the screen... the BitBlt function in Windows will allow you to copy only fragments of the image and resize the image as well when used correctly. __________________ Clifford Matthew Roche <geek@cliffordroche.com> Web Hosting: http://www.crd-hosting.com Consulting: http://www.crdev-consulting.com

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Mar 19th, 2005, 9:14 AM	#2
Hektik Newbie Join Date: Mar 2005 Posts: 2 Rep Power: 0	Bump

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Programming Forums > Application Development > C++

Image Panning