C++ MEvent::isModifierControl方法代码示例

MStatus SelectRingContext2::doPress( MEvent &event )
{
	listAdjust = MGlobal::kReplaceList;
	
	// Determine which modifier keys were pressed
	if( event.isModifierShift() || event.isModifierControl() ) 
	{
		if( event.isModifierShift() ) 
		{
			if( event.isModifierControl() ) 
				listAdjust = MGlobal::kAddToList; // Shift+Ctrl: Merge selection
			else
				listAdjust = MGlobal::kXORWithList; // Shift: Toggle selection (XOR)
		} 
		else
		{
			if( event.isModifierControl() )
				listAdjust = MGlobal::kRemoveFromList; // Ctrl: Remove selection
		}
	}
	
	// Get the position of the mouse click
	event.getPosition( pressX, pressY );

	return MS::kSuccess;		
}

void marqueeContext::doPressCommon( MEvent & event )
{
	// Figure out which modifier keys were pressed, and set up the
	// listAdjustment parameter to reflect what to do with the selected points.
	if (event.isModifierShift() || event.isModifierControl() ) {
		if ( event.isModifierShift() ) {
			if ( event.isModifierControl() ) {
				// both shift and control pressed, merge new selections
				listAdjustment = MGlobal::kAddToList;
			} else {
				// shift only, xor new selections with previous ones
				listAdjustment = MGlobal::kXORWithList;
			}
		} else if ( event.isModifierControl() ) {
			// control only, remove new selections from the previous list
			listAdjustment = MGlobal::kRemoveFromList; 
		}
	} else {
		listAdjustment = MGlobal::kReplaceList;
	}

	// Extract the event information
	//
	event.getPosition( start_x, start_y );
}

MStatus marqueeContext::doPress( MEvent & event )
//
// Begin marquee drawing (using OpenGL)
// Get the start position of the marquee 
//
{

		// Figure out which modifier keys were pressed, and set up the
	// listAdjustment parameter to reflect what to do with the selected points.
	if (event.isModifierShift() || event.isModifierControl() ) {
		if ( event.isModifierShift() ) {
			if ( event.isModifierControl() ) {
				// both shift and control pressed, merge new selections
				listAdjustment = MGlobal::kAddToList;
			} else {
				// shift only, xor new selections with previous ones
				listAdjustment = MGlobal::kXORWithList;
			}
		} else if ( event.isModifierControl() ) {
			// control only, remove new selections from the previous list
			listAdjustment = MGlobal::kRemoveFromList; 
		}
	} else {
		listAdjustment = MGlobal::kReplaceList;
	}

	// Extract the event information
	//
	event.getPosition( start_x, start_y );

	// Enable OpenGL drawing on viewport
	view = M3dView::active3dView();
	view.beginGL();

#ifdef USE_SOFTWARE_OVERLAYS
	p_last_x = start_x;
	p_last_y = start_y;

	fsDrawn = false;
#else
	// If HW overlays supported then initialize the overlay plane for drawing.
	view.beginOverlayDrawing();
#endif

	return MS::kSuccess;		
}

MStatus lassoTool::doPress( MEvent & event )
// Set up for overlay drawing, and remember our starting point
{
	// Figure out which modifier keys were pressed, and set up the
	// listAdjustment parameter to reflect what to do with the selected points.
	if (event.isModifierShift() || event.isModifierControl() ) {
		if ( event.isModifierShift() ) {
			if ( event.isModifierControl() ) {
				// both shift and control pressed, merge new selections
				listAdjustment = MGlobal::kAddToList;
			} else {
				// shift only, xor new selections with previous ones
				listAdjustment = MGlobal::kXORWithList;
			}
		} else if ( event.isModifierControl() ) {
			// control only, remove new selections from the previous list
			listAdjustment = MGlobal::kRemoveFromList; 
		}
	} else {
		listAdjustment = MGlobal::kReplaceList;
	}

	// Get the active 3D view.
	//
	view = M3dView::active3dView();

	// Create an array to hold the lasso points. Assume no mem failures
	maxSize = initialSize;
	lasso = (coord*) malloc (sizeof(coord) * maxSize);

	coord start;
	event.getPosition( start.h, start.v );
	num_points = 1;
	lasso[0] = min = max = start;

	firstDraw = true;

	return MS::kSuccess;
}