C / C++ / MFC

27-Jan-06 0:47

An option would be to select both of them into separate memory dc's and display them as and when needed.

Invalidate the surface on which you are drawing them. So it will be like hiding and unhiding.

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Re: Show or Hide image

David Crow27-Jan-06 3:00

27-Jan-06 3:00

Are the images part of a static or picture control? If so, just use ShowWindow(SW_HIDE).

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Re: Show or Hide image

waxie29-Jan-06 15:49

waxie

29-Jan-06 15:49

This does not work. I've already tried this one. Frown | :(

waxie

tough nut

Great A'Tuin26-Jan-06 22:49

26-Jan-06 22:49

hi folks,

ok, i hope i can describe this in a way that will be understandable Smile | :)

so here's what i plan to do: i want to display a splash screen with an alpha channel. neither the bitmaps rectangle nor the surrounding color of my graphic should visible. i.e. i need to set the surrounding color to be drawn 100% transparent. not difficult so far. but here's the tough part. namely, i want the splash screen to appear like it comes from nowhere. it should start with a opacity of 0% (i.e. 100% transparence) and within a few seconds it should become more and more visible until it has a final opacity of 100%. confused ? me too Wink | ;)

i'm only able to display the graphic without the surrounding stuff (alpha value) when the graphics opacity is set to 100%. but when it comes to the piont where i need to set the opacity to a lower value and still want to make the surrounding color of my graphic completely invisible i'm starting to freak out. i don't know how to achieve this.

i would be very glad about some hints ... any hints WTF | :WTF:

thanks in advance.

Re: tough nut

PJ Arends26-Jan-06 23:41

PJ Arends

26-Jan-06 23:41

Some ideas:
1: Do a screen grab of the area your splash screen will cover. In memory use the grabbed bitmap as the background, draw your splash screen on it. Blit that bitmap to the screen. Not true transparency, but it will appear that way to the user.

2: Use a window region (HRGN) that corresponds to the opaque part of your splash screen.

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Re: tough nut

Great A'Tuin27-Jan-06 0:05

27-Jan-06 0:05

nice idea, actually. and i've already tried it. there is just one problem. the graphic i want to show is not rectangular (neither elliptic) it's a custom hand drawn one. so if i draw my splash on the background image and make it slightly transparent the whole graphic (including the surrounding alpha color) will be visible on it. you understand ? but the alpha color should be complete invisible during the entire appearance procedure.

Re: tough nut

PJ Arends27-Jan-06 0:29

PJ Arends

27-Jan-06 0:29

Use an intermediate step. Use two memory bitmaps containing the background image. On one draw your splash screen with TransparentBlt() (Image is 100% opaque, alpha colour 100% transparent), then draw that image at the transparency you want onto the second bitmap. Because the "transparent" parts are the same colour the alpha blending will appear transparent.

As for the window region idea, you should be able to adapt the code found at http://www.codeproject.com/buttonctrl/irregular_buttons.asp[^] to create the reguired window region for your splash screen.

Owner drawn26-Jan-06 23:57

26-Jan-06 23:57

Did you try the AlphaBlend function...

This will help you...
http://www.codeproject.com/gdi/alphablend.asp[^]

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Great A'Tuin27-Jan-06 0:11

27-Jan-06 0:11

yeah. i use it already.
AlphaBlend and SetLayeredWindowAttributes are the two main functions with those i'm trying to get this done. But they don't last out.

Owner drawn27-Jan-06 0:12

27-Jan-06 0:12

Take a look at the sample...

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Great A'Tuin27-Jan-06 0:22

27-Jan-06 0:22

selecting rectangular bitmaps and AlphaBlending them is not my problem. i need to get it done with non-rectangular bitmaps.

Owner drawn27-Jan-06 0:37

27-Jan-06 0:37

You've got to use SetWindowRegion and AlphaBlend together.

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Owner drawn27-Jan-06 0:40

27-Jan-06 0:40

This one is all about Alpha Blending of non-rectangular bitmaps

http://www.codeproject.com/miscctrl/csplashscreenex.asp[^]

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Great A'Tuin27-Jan-06 1:36

27-Jan-06 1:36

yesss that's it! thanks a lot!!

... AnimateWindow was completely new to me D'Oh! | :doh:

Disabling the button

rrrado26-Jan-06 22:46

rrrado

26-Jan-06 22:46

I have a button in my dialog. When I disable it using m_button.EnableWindow(FALSE) while other control has the focus, other control loses the focus it seems the disabled button gets the focus because after pressing arrow key the control next to button gets focus.
Is this by desing or some bug ? How to avoid this ? SetFocus() to previous control does not work Unsure | :~

Thanks !

rrrado

Owner drawn26-Jan-06 23:00

26-Jan-06 23:00

It has happened with me too many times.

AFAIK it's not a bug. But it shouldn't be happening.

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

David Crow27-Jan-06 3:12

27-Jan-06 3:12

There's more to this than what you've provided. I was able to create a dialog-based project with three controls. The first control has the initial focus. When I disabled the second control, focus remained on the first control. Pressing the Tab key changed focus to the third control.

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

rrrado27-Jan-06 3:48

rrrado

27-Jan-06 3:48

I have combo box control (1st control) . When you change current selection using arrow keys, OnSelectionChanged handler will recognize that certain item was selected and will call EnableWindow(FALSE) to some another button (2nd control). When you hit down arrow key again, instead of changing current combo box item, the 3rd control in the dialog is focused

rrrado

David Crow27-Jan-06 5:16

27-Jan-06 5:16

Something else is still at play here. I duplicated your layout and it still worked fine. Your best bet is to create a temporary dialog-based project with just those three controls on the dialog template, and a ON_CBN_SELCHANGE() handler. What does that yield?

"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli

Loading 2 bitmaps in one picture control one at a time

rrrado30-Jan-06 22:52

rrrado

30-Jan-06 22:52

Thank you for your time ! Clean dialog works for me too, I'll find out what's going on in my project.

thank you ! Rose | [Rose]

rrrado

waxie26-Jan-06 22:38

waxie

26-Jan-06 22:38

Hi guys,

I've been trying to load bitmaps into my dialog. I have one picture control and i have 2 bitmaps that i want to use.
this is part my code in general:
if (Firstsituation)
{
thisimage.SetBitmap(bmp1);
}
else
{
thisimage.SetBitmap(bmp2);
}
I'm wondering why it keeps on loading the image i have at default at my picture control properties. I just can't load them the way I want them to.
Even when I remove the code for LoadBitmap(CONTROL), it still executes the project, though a bit of code is missing. Anyone who can enlighten me? I'm kinda confused.

waxiegal Rose | [Rose]

Re: Loading 2 bitmaps in one picture control one at a time

namaskaaram26-Jan-06 23:13

namaskaaram

26-Jan-06 23:13

perhaps this link might enlighten u!http://www.codeproject.com/bitmap/bmpscroll.asp[^]

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Structured Exception Handling - Win32 Style

Richard Andrew x6426-Jan-06 22:13

Richard Andrew x64

26-Jan-06 22:13

Hello,

I tried to use __try __except in a certain function, and the compiler said, "Can't use __try in a function that requires object unwinding."

Does "object unwinding" refer to objects declared on the stack?

Does it imply that if all the objects used in the function happen to be on the heap, then I can use __try __except?

Thanks,
Rich

Re: Structured Exception Handling - Win32 Style

David Crow27-Jan-06 3:17