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Re: How to catch and overwrite child control event? [message #13674 is a reply to message #13673]

Mon, 21 January 2008 02:00

Oblivion
Messages: 1094
Registered: August 2007

Senior Contributor

One more general (maybe application wide) way is to use a "keyhook".
I assume you derive your class from Ctrl or a Ctrl derived class (as usual in U++):

Define a KeyHook.

Below is the code of a key hook for intercepting Ctrl+Home key:

class foo : public Ctrl
{
// some other declarations...
// some other declarations...
 
	static bool CtrlKeyHook(Ctrl* ctrl, dword key, int count)	{ if(key == K_CTRL_HOME && ctrl == &myctrl) // here goes the intercepting function or method... // ; return true; }
}

As You can see in the above declaration, you can identify the "Ctrl" which sends the message too.

in the class implementation:

foo::foo()
{
	InstallKeyHook(&foo::CtrlKeyHook);
}

foo::~foo()
{
	DeinstallKeyHook(&foo::CtrlKeyHook);
}

(Two things: don't forget to return true (and dont forget to "Deinstall" hook...)

You can find more info about other hook types (mouse, state) in CtrlCore/Src/Ctrl section of the Help Topics of TheIDE Wink

Ps: I don't know why your code didn't work (I should work), but I uploaded a Key() virtual function version below. I Hope It'll help...

Attachment: KeyTest.rar
(Size: 0.83KB, Downloaded 307 times)

Github page: https://github.com/ismail-yilmaz
upp-components: https://github.com/ismail-yilmaz/upp-components
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

[Updated on: Mon, 21 January 2008 02:21]

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