Added basic image object functionality.

2016-06-26 12:49:47 -04:00
parent e78a3ee510
commit f7ccf4ca7b
12 changed files with 585 additions and 180 deletions
@@ -0,0 +1,240 @@
+/*  LabelModelImageObject.cpp
+ *
+ *  Copyright (C) 2013-2016  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 "LabelModelImageObject.h"
+
+#include <QBrush>
+#include <QPen>
+#include <QImage>
+
+
+namespace
+{
+}
+
+
+///
+/// Static data
+///
+QImage* LabelModelImageObject::smDefaultImage = 0;
+
+
+///
+/// Constructor
+///
+LabelModelImageObject::LabelModelImageObject() : mImage(0)
+{
+	mOutline = new Outline( this );
+
+	mHandles << new HandleNorthWest( this );
+	mHandles << new HandleNorth( this );
+	mHandles << new HandleNorthEast( this );
+	mHandles << new HandleEast( this );
+	mHandles << new HandleSouthEast( this );
+	mHandles << new HandleSouth( this );
+	mHandles << new HandleSouthWest( this );
+	mHandles << new HandleWest( this );
+
+	if ( smDefaultImage == 0 )
+	{
+		smDefaultImage = new QImage( ":images/checkerboard.png" );
+	}
+}
+
+
+///
+/// Copy constructor
+///
+LabelModelImageObject::LabelModelImageObject( const LabelModelImageObject* object ) : LabelModelObject(object)
+{
+	mFilenameNode = object->mFilenameNode;
+}
+
+
+///
+/// Destructor
+///
+LabelModelImageObject::~LabelModelImageObject()
+{
+	delete mOutline;
+
+	foreach( Handle* handle, mHandles )
+	{
+		delete handle;
+	}
+	mHandles.clear();
+}
+
+
+///
+/// Clone
+///
+LabelModelImageObject* LabelModelImageObject::clone() const
+{
+	return new LabelModelImageObject( this );
+}
+
+
+///
+/// Image filenameNode Property Getter
+///
+TextNode LabelModelImageObject::filenameNode( void ) const
+{
+	return mFilenameNode;
+}
+
+
+///
+/// Image filenameNode Property Setter
+///
+void LabelModelImageObject::setFilenameNode( const TextNode& value )
+{
+	if ( mFilenameNode != value )
+	{
+		mFilenameNode = value;
+		loadImage();
+		
+		emit changed();
+	}
+}
+
+
+///
+/// Draw shadow of object
+///
+void LabelModelImageObject::drawShadow( QPainter* painter, bool inEditor, merge::Record* record ) const
+{
+	QRectF destRect( 0, 0, mW.pt(), mH.pt() );
+	
+	QColor shadowColor = mShadowColorNode.color( record );
+	shadowColor.setAlphaF( mShadowOpacity );
+
+	if ( mImage && mImage->hasAlphaChannel() && (mImage->depth() == 32) )
+	{
+		QImage* shadowImage = createShadowImage( shadowColor );
+		painter->drawImage( destRect, *shadowImage );
+		delete shadowImage;
+	}
+	else
+	{
+		painter->setBrush( shadowColor );
+		painter->setPen( QPen( Qt::NoPen ) );
+
+		painter->drawRect( destRect );
+	}
+}
+
+	
+///
+/// Draw object itself
+///
+void LabelModelImageObject::drawObject( QPainter* painter, bool inEditor, merge::Record* record ) const
+{
+	QRectF destRect( 0, 0, mW.pt(), mH.pt() );
+	
+	if ( inEditor && (mFilenameNode.isField() || !mImage ) )
+	{
+		painter->save();
+		painter->setRenderHint( QPainter::SmoothPixmapTransform, false );
+		painter->drawImage( destRect, *smDefaultImage );
+		painter->restore();
+	}
+	else if ( mImage )
+	{
+		painter->drawImage( destRect, *mImage );
+	}
+	else if ( mFilenameNode.isField() )
+	{
+	}
+}
+
+
+///
+/// Path to test for hover condition
+///
+QPainterPath LabelModelImageObject::hoverPath( double scale ) const
+{
+	QPainterPath path;
+	path.addRect( 0, 0, mW.pt(), mH.pt() );
+
+	return path;
+}
+
+
+///
+/// Load image
+///
+void LabelModelImageObject::loadImage()
+{
+	if ( mImage )
+	{
+		delete mImage;
+	}
+
+	if ( mFilenameNode.isField() )
+	{
+		mImage = 0;
+	}
+	else
+	{
+		QString filename = mFilenameNode.data();
+		mImage = new QImage( filename );
+		if ( mImage->isNull() )
+		{
+			mImage = 0;
+		}
+		else
+		{
+			double imageW = mImage->width();
+			double imageH = mImage->height();
+			double aspectRatio = imageH / imageW;
+			if ( mH > mW*aspectRatio )
+			{
+				mH = mW*aspectRatio;
+			}
+			else
+			{
+				mW = mH/aspectRatio;
+			}
+		}
+	}
+}
+
+
+QImage* LabelModelImageObject::createShadowImage( const QColor& color ) const
+{
+	int r = color.red();
+	int g = color.green();
+	int b = color.blue();
+	int a = color.alpha();
+		
+	QImage* shadow = new QImage( *mImage );
+	for ( int iy = 0; iy < shadow->height(); iy++ )
+	{
+		QRgb* scanLine = (QRgb*)shadow->scanLine( iy );
+		
+		for ( int ix = 0; ix < shadow->width(); ix++ )
+		{
+			scanLine[ix] = qRgba( r, g, b, (a*qAlpha(scanLine[ix]))/255 );
+		}
+	}
+
+	return shadow;
+}