Impala Documentation

virtual void OglGui::ZoomShiftRuler::MouseFunc	(	int	msg,
		int	btn,
		int	state,
		int	x,
		int	y
	)			`[inline, virtual]`

This function is called by the event handling system everytime the user has moved or clicked the mouse.

So if you want a window which reacts to the mouse in a specific way, you can inherit a class from Window. Another method to implement mouse behaviour is to use a window listener (in this case you have to inherit a class from WindowListener and attach it to this window, see WindowListener for more details)

Reimplemented from OglGui::Window.

Reimplemented in Impala::Visualization::SimilarityTimeLine.

Definition at line 256 of file ZoomShiftRuler.h.

References CheckPropagateScrolling(), Current(), mClickedUnit, mClickedX, OglGui::DocDimensions::mDocW, OglGui::DocDimensions::mDocX, mDragging, mLastX, mMaxDocWidth, mMinDocWidth, mMouseState, OglGui::OglWindow::mOglWnd, OglGui::Window::MouseFunc(), mPropagateScrolling, mScaling, Pixel2Unit(), SetDocXClamped(), OglGui::RepeatTimer::StartRepeatTime(), and Unit2Pixel().

Referenced by DisplayFunc(), and Impala::Visualization::SimilarityTimeLine::MouseFunc().

00257     {
00258         Window::MouseFunc(msg,btn,state,x,y);
00259 
00260         if (state & oglAlt) return;
00261 
00262         bool shift   = (state & oglShift) != 0;
00263         bool control = (state & oglControl) != 0;
00264 
00265         mMouseState = state;
00266 
00267         if ((msg==oglMouseDown && btn==oglLeftButton) || (!mScaling && control)) 
00268         {
00269             StartRepeatTime();
00270             CheckPropagateScrolling(x);
00271             mClickedUnit = Pixel2Unit(x);
00272             if (!(shift||control))
00273                 Current(mClickedUnit);
00274             mLastX = mClickedX = x;
00275             mDragging = true;
00276             if (control)
00277                 mScaling = true;
00278         }
00279 
00280         if (mScaling && !control)
00281             mScaling = false;
00282 
00283         if (msg == oglMouseUp)
00284         {
00285             mPropagateScrolling = mDragging = mScaling = false;
00286             oglSys.SetAlwaysDraw(mOglWnd, 0);
00287         }
00288     
00289         if (msg == oglMouseMove && mDragging)
00290         {
00291             CheckPropagateScrolling(x);
00292             int dx = x - mLastX;
00293             if (mScaling)
00294             {
00295                 int oldDocW = mDocW;
00296                 mDocW *= (1 + .02*dx);
00297                 if (oldDocW > 0 && mDocW<0) // Overflow
00298                     mDocW = oldDocW;
00299 
00300                 if (mDocW < mMinDocWidth)
00301                     mDocW = mMinDocWidth;
00302                 if (mDocW > mMaxDocWidth)
00303                     mDocW = mMaxDocWidth;
00304 
00305                 long clickedPixelNow = Unit2Pixel(mClickedUnit);
00306                 mDocX += mLastX - clickedPixelNow;
00307                 mDocX -= mLastX - mClickedX;
00308             }
00309             else if (shift)
00310                 SetDocXClamped(mDocX+dx);
00311             else
00312                 Current(Pixel2Unit(x));
00313 
00314             mLastX = x;
00315         }
00316     }

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