Added selection highlight layer to view.

glabels/Handles.cpp

@@ -0,0 +1,440 @@
+/*  Handles.cpp
+ *
+ *  Copyright (C) 2013  Jim Evins <evins@snaught.com>
+ *
+ *  This file is part of gLabels-qt.
+ *
+ *  gLabels-qt is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  gLabels-qt is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with gLabels-qt.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Handles.h"
+
+
+#include "LabelModelObject.h"
+
+#include <QColor>
+
+
+namespace
+{
+	const double handlePixels             = 7;
+	const double handleOutlineWidthPixels = 1;
+
+	const QColor handleFillColor( 0,  192,  0,  96 );
+	const QColor handleOutlineColor( 0,  0,   0,  192 );
+}
+
+
+///
+/// Handle Constructor
+///
+glabels::Handle::Handle( LabelModelObject* owner )
+	: mOwner(owner)
+{
+}
+
+
+///
+/// Handle Destructor
+///
+glabels::Handle::~Handle()
+{
+}
+
+
+///
+/// Draw Handle at x,y
+///
+void glabels::Handle::drawAt( QPainter* painter, double x, double y ) const
+{
+	painter->save();
+
+	painter->translate( x, y );
+	painter->resetTransform();
+
+	painter->setPen( QPen( handleOutlineColor, handleOutlineWidthPixels ) );
+	painter->setBrush( handleFillColor );
+
+	painter->drawRect( -handlePixels/2, -handlePixels/2, handlePixels, handlePixels );
+
+	painter->restore();
+}
+
+
+///
+/// Create Handle path at x,y
+///
+QPainterPath glabels::Handle::pathAt( QPainter *painter, double x, double y ) const
+{
+	QPainterPath path;
+
+	QTransform transform = painter->transform();
+	double sx = 1/transform.m11();
+	double sy = 1/transform.m22();
+
+	path.addRect( -sx*handlePixels/2, -sy*handlePixels/2, sx*handlePixels, sy*handlePixels );
+	path.translate( x, y );
+	
+	return path;
+}
+
+
+///
+/// HandleNorth Constructor
+///
+glabels::HandleNorth::HandleNorth( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleNorth Destructor
+///
+glabels::HandleNorth::~HandleNorth()
+{
+}
+
+
+///
+/// Draw HandleNorth
+///
+void glabels::HandleNorth::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleNorth Path
+///
+QPainterPath glabels::HandleNorth::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleNorthEast Constructor
+///
+glabels::HandleNorthEast::HandleNorthEast( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleNorthEast Destructor
+///
+glabels::HandleNorthEast::~HandleNorthEast()
+{
+}
+
+
+///
+/// Draw HandleNorthEast
+///
+void glabels::HandleNorthEast::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleNorthEast Path
+///
+QPainterPath glabels::HandleNorthEast::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleEast Constructor
+///
+glabels::HandleEast::HandleEast( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleEast Destructor
+///
+glabels::HandleEast::~HandleEast()
+{
+}
+
+
+///
+/// Draw HandleEast
+///
+void glabels::HandleEast::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleEast Path
+///
+QPainterPath glabels::HandleEast::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleSouthEast Constructor
+///
+glabels::HandleSouthEast::HandleSouthEast( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleSouthEast Destructor
+///
+glabels::HandleSouthEast::~HandleSouthEast()
+{
+}
+
+
+///
+/// Draw HandleSouthEast
+///
+void glabels::HandleSouthEast::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleSouthEast Path
+///
+QPainterPath glabels::HandleSouthEast::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleSouth Constructor
+///
+glabels::HandleSouth::HandleSouth( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleSouth Destructor
+///
+glabels::HandleSouth::~HandleSouth()
+{
+}
+
+
+///
+/// Draw HandleSouth
+///
+void glabels::HandleSouth::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleSouth Path
+///
+QPainterPath glabels::HandleSouth::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleSouthWest Constructor
+///
+glabels::HandleSouthWest::HandleSouthWest( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleSouthWest Destructor
+///
+glabels::HandleSouthWest::~HandleSouthWest()
+{
+}
+
+
+///
+/// Draw HandleSouthWest
+///
+void glabels::HandleSouthWest::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleSouthWest Path
+///
+QPainterPath glabels::HandleSouthWest::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleWest Constructor
+///
+glabels::HandleWest::HandleWest( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleWest Destructor
+///
+glabels::HandleWest::~HandleWest()
+{
+}
+
+
+///
+/// Draw HandleWest
+///
+void glabels::HandleWest::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleWest Path
+///
+QPainterPath glabels::HandleWest::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleNorthWest Constructor
+///
+glabels::HandleNorthWest::HandleNorthWest( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleNorthWest Destructor
+///
+glabels::HandleNorthWest::~HandleNorthWest()
+{
+}
+
+
+///
+/// Draw HandleNorthWest
+///
+void glabels::HandleNorthWest::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleNorthWest Path
+///
+QPainterPath glabels::HandleNorthWest::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleP1 Constructor
+///
+glabels::HandleP1::HandleP1( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleP1 Destructor
+///
+glabels::HandleP1::~HandleP1()
+{
+}
+
+
+///
+/// Draw HandleP1
+///
+void glabels::HandleP1::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleP1 Path
+///
+QPainterPath glabels::HandleP1::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleP2 Constructor
+///
+glabels::HandleP2::HandleP2( LabelModelObject* owner )
+	: Handle(owner)
+{
+}
+
+
+///
+/// HandleP2 Destructor
+///
+glabels::HandleP2::~HandleP2()
+{
+}
+
+
+///
+/// Draw HandleP2
+///
+void glabels::HandleP2::draw( QPainter* painter ) const
+{
+	drawAt( painter, mOwner->w()/2, 0 );
+}
+
+
+///
+/// HandleP2 Path
+///
+QPainterPath glabels::HandleP2::path( QPainter* painter ) const
+{
+	return pathAt( painter, mOwner->w()/2, 0 );
+}