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Inside COM by Microsoft Press
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When i use it on mine it returns 0xcd as the color of ALL the pixels.
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according to this, you need to test RC_BITBLT
-c
Garbage collection, making life better - for weenies!
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Can anybody shed some light on why my list box might be doing this when I size it, and sometimes not even *appearing* when I alt-tab back to my app?
It's part of a tab control (in my dialog app) that I manually ShowWindow when a user clicks on a certain tab.
Thanks ahead of time,
- Jason
(SonorkID 100.611)
In the beginning, teachers taught the 5 W's: who, what, where, when, why. Now it's just a big damn G
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I have had a simliar problem on a docking window. In the end I had to force the control to re-paint everything, not just the area that had changed. You will probably have to put and Invalidate() call at the end of your OnSize() procedure to get it to re-draw properly.
Roger Allen
Sonork 100.10016
If I had a quote, it would be a very good one.
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Thanks for the response. I've been hunting this problem all day and have narrowed it down enough to know the cause. It seems to do this only when I have two list controls stacked atop each other. They're inside a tab control and I ShowWindow(FALSE) them and then ShowWindow(TRUE) one of them depending on which tab is active. Any further ideas? I'll keep poking around in the meantime, and I'll try your trick.
UPDATE: It's the tab control that's causing it. When I ShowWindow(FALSE) the tab control before anything else, the problem goes away. Will I have to subclass CTabCtrl and make it not draw the background or somethiNG?
Thanks again,
- Jason
(SonorkID 100.611)
In the beginning, teachers taught the 5 W's: who, what, where, when, why. Now it's just a big damn G
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Jason Hooper wrote:
Will I have to subclass CTabCtrl and make it not draw the background or somethiNG?
First, make sure you have the WS_CLIPSIBLINGS style set for the tab control. While you're at it, make sure WS_CLIPCHILDREN is set for the dialog also. If neither of those works, i'd try Roger's suggestion (Invalidate() on resize) before something as drastic as sublcassing.
--------
The real problem is that you don't have to be religious to be a religious fanatic,
you just have to be a fanatic. -- Stan Shannon, the lounge
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I removed WS_CLIPSIBLINGS for the tab control, and added WS_CLIPCHILDREN to the dialog itself, and all seems to work fine. Thank you! This was getting under my skin.
- Jason
(SonorkID 100.611)
In the beginning, teachers taught the 5 W's: who, what, where, when, why. Now it's just a big damn G
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As an aside, I would also change the ShowWindow() calss from TRUE/FALSE to SW_HIDE and SW_SHOW, as you cannot guarantee that TRUE/FALSE will work as expected.
Roger Allen
Sonork 100.10016
If I had a quote, it would be a very good one.
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Thanks for the tip, I'll do that.
- Jason
(SonorkID 100.611)
In the beginning, teachers taught the 5 W's: who, what, where, when, why. Now it's just a big damn G
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2 header files:
- Class1.h contains CClass1
- Class2.h contains CClass2
2 class files:
- Class1.cpp #include "stdafx.h"
- Class2.cpp #include "stdafx.h"
CClass1 contains pointer to CClass2 object, CClass2 contains pointer to CClass1 object.
So:
-Class1.h: #include "Class2.h"
-Class2.h: #include "Class1.h"
When trying to compile this, the compiler returns aprox. 60000 errors. That's because the classes are already defined.
How can we solve this problem? A clean solution please.
[VISUAL STUDIO 6.0] [MFC] [WIN98/2]
Bluute tette!
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The both classes use this:
#if !defined
#define
....
#endif
and it still doesn't work
[VISUAL STUDIO 6.0] [MFC] [WIN98/2]
Bluute tette!
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I answered a question similar to this one a while back. Look here.
Regards,
Alvaro
Insanity: doing the same thing over and over again and expecting different results. - Albert Einstein
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put forward declarations in the Class1.h and Class2.h files and only add the include directives in the cpp files.
class Class2;
class Class1
{
Class2* p;
};
and
class Class1;
class Class2
{
Class1* p;
};
Max.
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I just can't.
Class1.h needs definitions for CClass2 and Class2.h needs definitions for CClass1
[VISUAL STUDIO 6.0] [MFC] [WIN98/2]
Bluute tette!
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frisco wrote:
Class1.h needs definitions for CClass2 and Class2.h needs definitions for CClass1
Forward declaration will tell the compiler to expect this class definition later and allow it's use now
Class CClass2; // Fwd declared, but not defined yet
Class CClass1
{
// Stuff
// Ref to class 2 here
};
Class CClass2
{
// Other stuff
// Ref to class 1 here
};
Paresh Solanki
hombre que trabaja pierde tempo precioso "The man who works is losing precious time." Vuemme
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Then your design is broken. Change your design to not have a circular dependency.
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been there.fixed that.
follow the steps.
1.choose one class to be a pointer say class2.In class2.h after the include guards-
2. class class1;
class class2 - declaration
3. #include"class1.h" - definition
now class 2 need not use a pointer
class1 class2::m_class1 will work.
If you still need a pointer just use it.
In class1.h,again declare
class class2
now
class2* class1::m_pclass2 will work
-cu
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If i want to save a bitmap to the disk, i first write BITMAPFILEHEADER struct to the disk and then a BITMAPINFO struct, but where do i specify the colors? I have an array of RGBQUAD's that contain all the colors but where do i specify them?
Thanks
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the palette comes after the BITMAPINFOHEADER struct and before the pixel data
-c
Garbage collection, making life better - for weenies!
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What is a palette, and in what struct to i specify the pixel data?
Thanks in advance.
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a palette is what you use to define the colors for a colormapped image (1,4 or 8 bits per pixel). if you're writing a 24 or 32 bpp BMP/DIB, you don't need a palette. in a BMP/DIB, the palette is the set of (up to) 256 RGBQUADs after the BITMAPINFOHEADER. after that comes the image data, formatted in any of a dozen or more ways, depending on bit depth, compression , JPG , PNG, etc..
-c
Garbage collection, making life better - for weenies!
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I need to retrieve, at run-time, the path of my application (the place where the user has put the executable file, place that is not fixed). Does someone know how I can do that ???
Thank a lot !!!
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see ::GetModuleFileName
-c
Garbage collection, making life better - for weenies!
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My app uses serial comms to collect data, it runs perfectly on my 1.1G Celeron XP machine, but when I tested it on a Cyrix PR233 running Win98 it crashes. After several hours of running OK it gives an error, which is 'Invalid Handle' - for the comm port.
What could cause it to loose the handle for the comm port?
Is it more likely to be the PC that is the critical difference or the operating system?
Anyone else had problems like this?
I've written the serial comms from a simple example, are there any good libraries or stuff that I could use that would make it more robust? Any recommendations?
Ali
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