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Re: capture mouse and limit all events to window [message #51704 is a reply to message #47441]

Mon, 29 April 2019 09:16

slashupp
Messages: 231
Registered: July 2009

Experienced Member

This applies to Linux-only.

To position the mouse-pointer anywhere in the window, or centered on a specific control in the window
I came up with this 'hack':

Header:

#ifndef _xfunc_h_
#define _xfunc_h_

#include <CtrlCore/CtrlCore.h>

namespace XFUNC
{
	
void set_Xmouse_pos(int x, int y);
void set_Xmouse_pos(Upp::Ctrl *pCtrl);

} //namespace XFUNC


#endif

Implementation:

#include "xfunc.h"

namespace XFUNC
{
	
#include <X11/Xlib.h>

void set_Xmouse_pos(int x, int y) //Ctrl *pCtrl)
{
	Upp::GuiLock __;
	static Display *disp=XOpenDisplay(0);
	if (disp)
	{
		Window wroot=XRootWindow(disp, 0);
		XWarpPointer(disp, 0, wroot, 0, 0, 0, 0, x, y);
		XFlush(disp);
	}
}

void set_Xmouse_pos(Upp::Ctrl *pCtrl)
{
	if (!pCtrl) return;
	Upp::GuiLock __;
	int x, y;
	Upp::Rect r=pCtrl->GetScreenRect();
	x=(r.left+r.Width()/2);
	y=(r.top+r.Height()/2);
	static Display *disp=XOpenDisplay(0);
	if (disp)
	{
		Window wroot=XRootWindow(disp, 0);
		XWarpPointer(disp, 0, wroot, 0, 0, 0, 0, x, y);
		XFlush(disp);
	}
}


} //namespace XFUNC

Hope this helps someone

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