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nick
Joined: 24 Aug 2005
Posts: 345
Location: Berlin / Germany
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 Posted: Sun Nov 04, 2007 10:10 am Post subject: Unexpected behavior of ControlSetText |
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Hello,
setting a new text into a AHK text control via ControlSetText seems to "overwrite" the existing text, if BackGroundTrans is specified in its options:
| Code: | #NoEnv
SetBatchLines, -1
FormatTime, OldTime, , HH:mm:ss
Gui, Margin, 20, 20
Gui, Color, Navy
Gui, Add, Text, x50 w150 cWhite BackgroundTrans HwndText1ID
Gui, Add, Text, x50 wp cWhite HwndText2ID
Gui, Show, , ControlSetText
SetTimer, CurrentTime, On
Return
GuiClose:
GuiEscape:
Gui, Destroy
ExitApp
CurrentTime:
FormatTime, CurrentTime, , HH:mm:ss
If (OldTime <> CurrentTime)
{
ControlSetText, , %CurrentTime% , ahk_id %Text1ID%
ControlSetText, , %CurrentTime% , ahk_id %Text2ID%
OldTime := CurrentTime
}
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AHK bug or Windows feature?
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nick
denick @ http://de.autohotkey.com/forum/ |
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Lexikos
Joined: 17 Oct 2006
Posts: 2558
Location: Australia, Qld
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| Posted: Sun Nov 04, 2007 11:21 am Post subject: |
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Using ControlSetText bypasses AutoHotkey's GUI system entirely (so it has no awareness of BackgroundTrans.) Use GuiControl instead: | Code: | | GuiControl,, Static1, %CurrentTime% |
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nick
Joined: 24 Aug 2005
Posts: 345
Location: Berlin / Germany
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| Posted: Sun Nov 04, 2007 9:28 pm Post subject: |
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Sorry lexikos,
that's no answer! Did you try my code?
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nick
denick @ http://de.autohotkey.com/forum/ |
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Superfraggle
Joined: 02 Nov 2004
Posts: 850
Location: London, UK
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| Posted: Sun Nov 04, 2007 10:24 pm Post subject: |
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Basically you are using the wrong command
| Code: | #NoEnv
SetBatchLines, -1
FormatTime, OldTime, , HH:mm:ss
Gui, Margin, 20, 20
Gui, Color, Navy
Gui, Add, Text, x50 w150 cWhite BackgroundTrans HwndText1ID vtime1
Gui, Add, Text, x50 wp cWhite HwndText2ID vtime2
Gui, Show, , ControlSetText
SetTimer, CurrentTime, On
Return
GuiClose:
GuiEscape:
Gui, Destroy
ExitApp
CurrentTime:
FormatTime, CurrentTime, , HH:mm:ss
If (OldTime <> CurrentTime)
{
Guicontrol, , time1,%CurrentTime%
Guicontrol, , time2,%CurrentTime%
OldTime := CurrentTime
}
Return |
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Steve F AKA Superfraggle
http://r.yuwie.com/superfraggle |
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Lexikos
Joined: 17 Oct 2006
Posts: 2558
Location: Australia, Qld
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| Posted: Mon Nov 05, 2007 12:13 am Post subject: |
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| nick wrote: | Sorry lexikos,
that's no answer! Did you try my code? |
Yes, I did. If you had tried my code (replacing ControlSetText with GuiControl as I said), you'd have realised that it most definitely was the answer. |
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engunneer
Joined: 30 Aug 2005
Posts: 6772
Location: Pacific Northwest, US
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| Posted: Mon Nov 05, 2007 12:41 am Post subject: |
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this is moved to Ask for help, since it is not a bug.
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 Unless otherwise noted, all code is untested.
Common Answers: 1.(Loops, Viruses, etc.) 2. Search 3.RTFM |
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nick
Joined: 24 Aug 2005
Posts: 345
Location: Berlin / Germany
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| Posted: Mon Nov 05, 2007 8:04 am Post subject: |
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@engunneer:
So far, so good. But which command should i use to change a text control not created with AHK? Is BackgroundTrans an AHK-specific style and would Control behave different?
@lexikos:
| Quote: | | Yes, I did. If you had tried my code (replacing ControlSetText with GuiControl as I said), you'd have realised that it most definitely was the answer. |
Would you add a picture as gui's background, please? Then you might see the difference between Control and GuiControl.
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nick
denick @ http://de.autohotkey.com/forum/ |
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Lexikos
Joined: 17 Oct 2006
Posts: 2558
Location: Australia, Qld
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| Posted: Mon Nov 05, 2007 10:36 am Post subject: |
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Interesting...
If the picture is added first, GuiControl causes everything but the first text control to disappear. If ControlSetText is used, the first text control is invisible, but everything else remains.
If the picture is added last, the first text control is invisible regardless of whether GuiControl or ControlSetText is used.
[Edit] Actually, using Superfraggles version of the script as a base, the first text control is always invisible, and everything else is always visible... [/Edit]
I see a difference, but either way the GUI as a whole is broken.
None of this changes my original point: ControlSetText cannot be expected to take into account the GUI options. In some cases, the GUI options correspond directly to standard window styles. This is not one of those cases.
| Quote: | | But which command should i use to change a text control not created with AHK? |
I'm not sure why you addressed the question at engunneer, but anyway... ControlSetText is intended for use with external controls, just as GuiControl is intended for internal GUI controls. | Quote: | | Is BackgroundTrans an AHK-specific style and would Control behave different? |
Have I not already stated that ControlSetText has no awareness of BackgroundTrans?
BackgroundTrans is implemented by hooking the "CTLCOLOR" messages, and setting a "null" brush to be used for the background. In other words, there is no way for ControlSetText to know that the option is in effect. Essentially, having a null background brush means the background won't be drawn when the control redraws itself. In the case of text controls, it may leave an image of the previous text behind.
GuiControl compensates for this by invalidating the rectangle which the control occupies. I'm not sure how that causes everything else to be "hidden." ("Invalidating" is notifying the OS that the window must be redrawn. In this case it should redraw only what is behind the control, and the control itself.)
Edit: This is the AHK equivalent of what GuiControl does to redraw: | Code: | VarSetCapacity(rect,16)
DllCall("GetWindowRect","uint",Text1ID,"uint",&rect)
Gui, +LastFound
DllCall("MapWindowPoints","uint",0,"uint",WinExist(),"uint",&rect,"int",2)
DllCall("InvalidateRect","uint",WinExist(),"uint",&rect,"int",1) |
Using that with ControlSetText lets it work as well as GuiControl, but the control is still invisible when I add a picture... |
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nick
Joined: 24 Aug 2005
Posts: 345
Location: Berlin / Germany
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| Posted: Mon Nov 05, 2007 11:14 am Post subject: |
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| lexikos wrote: | | In some cases, the GUI options correspond directly to standard window styles. This is not one of those cases. |
O.K., that's an answer 
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nick
denick @ http://de.autohotkey.com/forum/ |
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