First pass at moving to QPainter based view.
This commit is contained in:
Jim Evins
+446
-397
@@ -20,14 +20,10 @@
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#include "View.h"
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#include <QGraphicsScene>
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#include <QGraphicsItemGroup>
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#include <QMouseEvent>
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#include <QGraphicsLineItem>
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#include <QGraphicsDropShadowEffect>
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#include <algorithm>
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#include <cmath>
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#include <iostream>
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#include <QMouseEvent>
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#include <QtDebug>
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#include "LabelModel.h"
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#include "LabelModelObject.h"
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@@ -49,7 +45,7 @@ namespace
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const double ZOOM_TO_FIT_PAD = 16.0;
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const QColor shadowColor( 64, 64, 64 );
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const QColor shadowColor( 64, 64, 64, 128 );
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const double shadowOffsetPixels = 3;
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const double shadowRadiusPixels = 12;
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@@ -70,227 +66,420 @@ namespace
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}
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namespace glabels
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///
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/// Constructor
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///
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glabels::View::View( QWidget *parent ) : QWidget(parent)
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{
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mState = IdleState;
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///
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/// Constructor
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///
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View::View( QWidget *parent ) : QGraphicsView(parent)
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setZoomReal( 1, false );
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mModel = 0;
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mMarkupVisible = true;
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mGridVisible = true;
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mGridSpacing = 18;
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mInObjectCreateMode = false;
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setMouseTracking( true );
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}
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///
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/// Zoom property
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///
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double
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glabels::View::zoom() const
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{
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return mZoom;
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}
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///
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/// Markup visible? property
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///
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bool
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glabels::View::markupVisible() const
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{
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return mMarkupVisible;
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}
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///
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/// Grid visible? property
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///
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bool
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glabels::View::qridVisible() const
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{
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return mGridVisible;
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}
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///
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/// Model Parameter Setter
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///
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void
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glabels::View::setModel( LabelModel* model )
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{
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mModel = model;
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if ( model )
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{
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mState = IdleState;
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setZoomReal( 1, false );
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mModel = 0;
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setMouseTracking( true );
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setAttribute( Qt::WA_TranslucentBackground );
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viewport()->setAutoFillBackground( false );
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mScene = new QGraphicsScene();
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setScene( mScene );
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mScene->addItem( mLabelLayer = new QGraphicsItemGroup() );
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mScene->addItem( mGridLayer = new QGraphicsItemGroup() );
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mScene->addItem( mMarkupLayer = new QGraphicsItemGroup() );
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mScene->addItem( mObjectLayer = new QGraphicsItemGroup() );
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mScene->addItem( mForegroundLayer = new QGraphicsItemGroup() );
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mScene->addItem( mSelectRegionLayer = new QGraphicsItemGroup() );
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initSelectRegionLayer();
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connect( model, SIGNAL(changed()), this, SLOT(onModelChanged()) );
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connect( model, SIGNAL(selectionChanged()), this, SLOT(onModelSelectionChanged()) );
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connect( model, SIGNAL(sizeChanged()), this, SLOT(onModelSizeChanged()) );
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}
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}
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///
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/// Model Parameter Setter
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///
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void View::setModel( LabelModel* model )
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///
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/// Grid Visibility Parameter Setter
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///
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void
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glabels::View::setGridVisible( bool visibleFlag )
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{
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mGridVisible = visibleFlag;
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update();
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}
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///
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/// Markup Visibility Parameter Setter
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///
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void
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glabels::View::setMarkupVisible( bool visibleFlag )
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{
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mMarkupVisible = visibleFlag;
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update();
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}
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///
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/// Zoom In "One Notch"
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///
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void
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glabels::View::zoomIn()
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{
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// Find closest standard zoom level to our current zoom
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// Start with 2nd largest scale
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int i_min = 1;
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double dist_min = fabs( zoomLevels[1] - mZoom );
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for ( int i = 2; i < nZoomLevels; i++ )
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{
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mModel = model;
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mScene->setSceneRect( 0, 0, model->w(), model->h() );
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initLabelLayer();
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initGridLayer();
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initMarkupLayer();
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foreach (LabelModelObject* object, model->objectList() )
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double dist = fabs( zoomLevels[i] - mZoom );
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if ( dist < dist_min )
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{
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addObjectToObjectLayer( object );
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i_min = i;
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dist_min = dist;
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}
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initForegroundLayer();
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}
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// Zoom in one notch
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setZoomReal( zoomLevels[i_min-1], false );
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}
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///
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/// Grid Visibility Parameter Setter
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///
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void View::setGridVisible( bool visibleFlag )
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///
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/// Zoom Out "One Notch"
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///
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void
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glabels::View::zoomOut()
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{
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// Find closest standard zoom level to our current zoom
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// Start with largest scale, end on 2nd smallest
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int i_min = 0;
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double dist_min = fabs( zoomLevels[0] - mZoom );
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for ( int i = 1; i < (nZoomLevels-1); i++ )
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{
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mGridLayer->setVisible( visibleFlag );
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}
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///
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/// Markup Visibility Parameter Setter
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///
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void View::setMarkupVisible( bool visibleFlag )
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{
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mMarkupLayer->setVisible( visibleFlag );
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}
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///
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/// Zoom In "One Notch"
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///
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void View::zoomIn()
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{
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// Find closest standard zoom level to our current zoom
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// Start with 2nd largest scale
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int i_min = 1;
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double dist_min = fabs( zoomLevels[1] - mZoom );
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for ( int i = 2; i < nZoomLevels; i++ )
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double dist = fabs( zoomLevels[i] - mZoom );
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if ( dist < dist_min )
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{
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double dist = fabs( zoomLevels[i] - mZoom );
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if ( dist < dist_min )
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i_min = i;
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dist_min = dist;
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}
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}
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// Zoom out one notch
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setZoomReal( zoomLevels[i_min+1], false );
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}
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///
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/// Zoom To 1:1 Scale
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///
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void
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glabels::View::zoom1To1()
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{
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setZoomReal( 1.0, false );
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}
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///
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/// Zoom To Fit
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///
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void
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glabels::View::zoomToFit()
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{
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using std::min;
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using std::max;
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double x_scale = (72.0/physicalDpiX()) * ( width() - ZOOM_TO_FIT_PAD ) / mModel->w();
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double y_scale = (72.0/physicalDpiY()) * ( height() - ZOOM_TO_FIT_PAD ) / mModel->h();
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double newZoom = min( x_scale, y_scale );
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// Limits
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newZoom = min( newZoom, zoomLevels[0] );
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newZoom = max( newZoom, zoomLevels[nZoomLevels-1] );
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setZoomReal( newZoom, true );
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}
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///
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/// Is Zoom at Maximum?
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///
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bool
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glabels::View::isZoomMax() const
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{
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return ( mZoom >= zoomLevels[0] );
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}
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///
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/// Is Zoom at Minimum?
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///
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bool
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glabels::View::isZoomMin() const
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{
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return ( mZoom <= zoomLevels[nZoomLevels-1] );
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}
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///
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/// Set Zoom to Value
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///
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void
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glabels::View::setZoomReal( double zoom, bool zoomToFitFlag )
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{
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mZoom = zoom;
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mZoomToFitFlag = zoomToFitFlag;
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update();
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emit zoomChanged();
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}
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///
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/// Paint Event Handler
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///
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void
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glabels::View::paintEvent( QPaintEvent* event )
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{
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if ( mModel )
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{
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QPainter painter( this );
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painter.scale( mZoom, mZoom );
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drawBgLayer( &painter );
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drawGridLayer( &painter );
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drawMarkupLayer( &painter );
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}
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}
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///
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/// Resize Event Handler
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///
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void
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glabels::View::resizeEvent( QResizeEvent *event )
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{
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if ( mZoomToFitFlag )
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{
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zoomToFit();
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}
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else
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{
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update();
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}
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}
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///
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/// Mouse Movement Event Handler
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///
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void
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glabels::View::mouseMoveEvent( QMouseEvent* event )
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{
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/*
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* Translate to label coordinates
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*/
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QTransform transform;
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transform.scale( mZoom, mZoom );
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qreal xWorld, yWorld;
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transform.inverted().map( event->x(), event->y(), &xWorld, &yWorld );
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/*
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* Emit signal regardless of mode
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*/
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emit pointerMoved( xWorld, yWorld );
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/*
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* Handle event as appropriate for mode
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*/
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if ( mInObjectCreateMode )
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{
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switch (mState)
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{
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case IdleState:
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/* @TODO handle handles. */
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if ( mModel->objectAt( xWorld, yWorld ) )
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{
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i_min = i;
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dist_min = dist;
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setCursor( Qt::SizeAllCursor );
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}
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else
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{
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setCursor( Qt::ArrowCursor );
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}
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break;
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case ArrowSelectRegion:
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mSelectRegion.setX2( xWorld );
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mSelectRegion.setY2( yWorld );
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update();
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break;
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case ArrowMove:
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mModel->moveSelection( (xWorld - mMoveLastX),
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(yWorld - mMoveLastY) );
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mMoveLastX = xWorld;
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mMoveLastY = yWorld;
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break;
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case ArrowResize:
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/* @TODO handle resize motion */
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break;
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default:
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// Should not happen!
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qWarning() << "Invalid arrow state.";
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break;
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}
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}
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else
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{
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if ( mState != IdleState )
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{
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switch (mCreateObjectType)
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{
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case Box:
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// @TODO
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break;
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case Ellipse:
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// @TODO
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break;
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case Line:
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// @TODO
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break;
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case Image:
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// @TODO
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break;
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case Text:
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// @TODO
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break;
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case Barcode:
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// @TODO
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break;
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default:
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// Should not happen!
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qWarning() << "Invalid create type.";
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break;
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}
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}
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// Zoom in one notch
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setZoomReal( zoomLevels[i_min-1], false );
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}
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}
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///
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/// Zoom Out "One Notch"
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///
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void View::zoomOut()
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///
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/// Mouse Button Press Event Handler
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///
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void
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glabels::View::mousePressEvent( QMouseEvent* event )
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{
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/*
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* Translate to label coordinates
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*/
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QTransform transform;
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transform.scale( mZoom, mZoom );
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qreal xWorld, yWorld;
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transform.inverted().map( event->x(), event->y(), &xWorld, &yWorld );
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if ( event->button() & Qt::LeftButton )
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{
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// Find closest standard zoom level to our current zoom
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// Start with largest scale, end on 2nd smallest
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int i_min = 0;
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double dist_min = fabs( zoomLevels[0] - mZoom );
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for ( int i = 1; i < (nZoomLevels-1); i++ )
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// Select Region
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if ( !(event->modifiers() & Qt::ControlModifier) )
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{
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double dist = fabs( zoomLevels[i] - mZoom );
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if ( dist < dist_min )
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{
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i_min = i;
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dist_min = dist;
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}
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mModel->unselectAll();
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}
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// Zoom out one notch
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setZoomReal( zoomLevels[i_min+1], false );
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mSelectRegionVisible = true;
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mSelectRegion.setX1( xWorld );
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mSelectRegion.setY1( yWorld );
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mSelectRegion.setX2( xWorld );
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mSelectRegion.setY2( yWorld );
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mState = ArrowSelectRegion;
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}
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///
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/// Zoom To 1:1 Scale
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///
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void View::zoom1To1()
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else
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{
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setZoomReal( 1.0, false );
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}
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}
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///
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/// Zoom To Fit
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///
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void View::zoomToFit()
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///
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/// Mouse Button Release Event Handler
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///
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void
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glabels::View::mouseReleaseEvent( QMouseEvent* event )
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{
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/*
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* Translate to label coordinates
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*/
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QTransform transform;
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transform.scale( mZoom, mZoom );
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qreal xWorld, yWorld;
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transform.inverted().map( event->x(), event->y(), &xWorld, &yWorld );
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if ( event->button() & Qt::LeftButton )
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{
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using std::min;
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using std::max;
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double x_scale = (72.0/physicalDpiX()) * ( width() - ZOOM_TO_FIT_PAD ) / mModel->w();
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double y_scale = (72.0/physicalDpiY()) * ( height() - ZOOM_TO_FIT_PAD ) / mModel->h();
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double newZoom = min( x_scale, y_scale );
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// Limits
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newZoom = min( newZoom, zoomLevels[0] );
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newZoom = max( newZoom, zoomLevels[nZoomLevels-1] );
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setZoomReal( newZoom, true );
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}
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///
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/// Is Zoom at Maximum?
|
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///
|
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bool View::isZoomMax() const
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{
|
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return ( mZoom >= zoomLevels[0] );
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}
|
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|
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|
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///
|
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/// Is Zoom at Minimum?
|
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///
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bool View::isZoomMin() const
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{
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return ( mZoom <= zoomLevels[nZoomLevels-1] );
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}
|
||||
|
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|
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///
|
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/// Set Zoom to Value
|
||||
///
|
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void View::setZoomReal( double zoom, bool zoomToFitFlag )
|
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{
|
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mZoom = zoom;
|
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mZoomToFitFlag = zoomToFitFlag;
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resetTransform();
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scale( mZoom*physicalDpiX()/72.0, mZoom*physicalDpiY()/72.0 );
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emit zoomChanged();
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}
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|
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///
|
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/// Resize Event Handler
|
||||
///
|
||||
void View::resizeEvent( QResizeEvent *event )
|
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{
|
||||
if ( mZoomToFitFlag )
|
||||
{
|
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zoomToFit();
|
||||
}
|
||||
else
|
||||
{
|
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// Refresh to keep view location relative to window
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||||
resetTransform();
|
||||
scale( mZoom*physicalDpiX()/72.0, mZoom*physicalDpiY()/72.0 );
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||||
}
|
||||
}
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|
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///
|
||||
/// Mouse Movement Event Handler
|
||||
///
|
||||
void View::mouseMoveEvent( QMouseEvent* event )
|
||||
{
|
||||
QPointF pointer = mapToScene( event->x(), event->y() );
|
||||
emit pointerMoved( pointer.x(), pointer.y() );
|
||||
|
||||
switch (mState)
|
||||
{
|
||||
|
||||
case IdleState:
|
||||
break;
|
||||
|
||||
case ArrowSelectRegionState:
|
||||
mSelectRegion.setX2( pointer.x() );
|
||||
mSelectRegion.setY2( pointer.y() );
|
||||
case ArrowSelectRegion:
|
||||
mSelectRegion.setX2( xWorld );
|
||||
mSelectRegion.setY2( yWorld );
|
||||
|
||||
mSelectRegionItem->setRect( mSelectRegion.rect() );
|
||||
mModel->selectRegion( mSelectRegion );
|
||||
|
||||
mState = IdleState;
|
||||
break;
|
||||
|
||||
default:
|
||||
@@ -299,139 +488,58 @@ namespace glabels
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Leave Event Handler
|
||||
///
|
||||
void View::leaveEvent( QEvent* event )
|
||||
else
|
||||
{
|
||||
emit pointerExited();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Mouse Button Press Event Handler
|
||||
///
|
||||
void View::mousePressEvent( QMouseEvent* event )
|
||||
///
|
||||
/// Leave Event Handler
|
||||
///
|
||||
void
|
||||
glabels::View::leaveEvent( QEvent* event )
|
||||
{
|
||||
emit pointerExited();
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Draw Background Layer
|
||||
///
|
||||
void
|
||||
glabels::View::drawBgLayer( QPainter* painter )
|
||||
{
|
||||
painter->save();
|
||||
|
||||
QBrush brush( shadowColor );
|
||||
painter->setBrush( QBrush( shadowColor ) );
|
||||
painter->translate( shadowOffsetPixels/mZoom, shadowOffsetPixels/mZoom );
|
||||
painter->drawPath( mModel->frame()->path() );
|
||||
|
||||
painter->restore();
|
||||
|
||||
painter->save();
|
||||
|
||||
painter->setBrush( QBrush( labelColor ) );
|
||||
painter->drawPath( mModel->frame()->path() );
|
||||
|
||||
painter->restore();
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Draw Grid Layer
|
||||
///
|
||||
void
|
||||
glabels::View::drawGridLayer( QPainter* painter )
|
||||
{
|
||||
if ( mGridVisible )
|
||||
{
|
||||
QPointF pointer = mapToScene( event->x(), event->y() );
|
||||
|
||||
if ( event->button() & Qt::LeftButton )
|
||||
{
|
||||
// Select Region
|
||||
if ( !(event->modifiers() & Qt::ControlModifier) )
|
||||
{
|
||||
mModel->unselectAll();
|
||||
}
|
||||
|
||||
mSelectRegion.setX1( pointer.x() );
|
||||
mSelectRegion.setY1( pointer.y() );
|
||||
mSelectRegion.setX2( pointer.x() );
|
||||
mSelectRegion.setY2( pointer.y() );
|
||||
|
||||
mSelectRegionItem->setRect( mSelectRegion.rect() );
|
||||
mSelectRegionLayer->setVisible( true );
|
||||
|
||||
mState = ArrowSelectRegionState;
|
||||
}
|
||||
else
|
||||
{
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Mouse Button Release Event Handler
|
||||
///
|
||||
void View::mouseReleaseEvent( QMouseEvent* event )
|
||||
{
|
||||
QPointF pointer = mapToScene( event->x(), event->y() );
|
||||
|
||||
if ( event->button() & Qt::LeftButton )
|
||||
{
|
||||
switch (mState)
|
||||
{
|
||||
|
||||
case IdleState:
|
||||
break;
|
||||
|
||||
case ArrowSelectRegionState:
|
||||
mSelectRegion.setX2( pointer.x() );
|
||||
mSelectRegion.setY2( pointer.y() );
|
||||
|
||||
mSelectRegionItem->setRect( 0, 0, 0, 0 );
|
||||
mSelectRegionLayer->setVisible( false );
|
||||
|
||||
mModel->selectRegion( mSelectRegion );
|
||||
|
||||
mState = IdleState;
|
||||
break;
|
||||
|
||||
default:
|
||||
// Should not happen!
|
||||
break;
|
||||
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Clear Layer (Item Group) of All Child Items
|
||||
///
|
||||
void View::clearLayer( QGraphicsItemGroup* layer )
|
||||
{
|
||||
foreach( QGraphicsItem* item, layer->childItems() )
|
||||
{
|
||||
layer->removeFromGroup( item );
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Initialize Label Layer
|
||||
///
|
||||
void View::initLabelLayer()
|
||||
{
|
||||
clearLayer( mLabelLayer );
|
||||
|
||||
QGraphicsPathItem *labelItem = new QGraphicsPathItem( mModel->frame()->path() );
|
||||
|
||||
QBrush brush( labelColor );
|
||||
labelItem->setBrush( brush );
|
||||
|
||||
QGraphicsDropShadowEffect *shadowEffect = new QGraphicsDropShadowEffect();
|
||||
shadowEffect->setColor( shadowColor );
|
||||
shadowEffect->setOffset( shadowOffsetPixels );
|
||||
shadowEffect->setBlurRadius( shadowRadiusPixels );
|
||||
labelItem->setGraphicsEffect( shadowEffect );
|
||||
|
||||
mLabelLayer->addToGroup( labelItem );
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Initialize Grid Layer
|
||||
///
|
||||
void View::initGridLayer()
|
||||
{
|
||||
clearLayer( mGridLayer );
|
||||
|
||||
QGraphicsPathItem *clipItem = new QGraphicsPathItem( mModel->frame()->path() );
|
||||
clipItem->setFlag( QGraphicsItem::ItemClipsChildrenToShape );
|
||||
|
||||
QPen pen( gridLineColor );
|
||||
pen.setCosmetic( true );
|
||||
pen.setWidthF( gridLineWidthPixels );
|
||||
|
||||
double w = mModel->w();
|
||||
double h = mModel->h();
|
||||
double x0;
|
||||
double y0;
|
||||
|
||||
double x0, y0;
|
||||
if ( dynamic_cast<const libglabels::FrameRect*>( mModel->frame() ) )
|
||||
{
|
||||
x0 = gridSpacing;
|
||||
@@ -439,97 +547,38 @@ namespace glabels
|
||||
}
|
||||
else
|
||||
{
|
||||
/* round labels, align grid with center of label. */
|
||||
/* round labels, adjust grid to line up with center of label. */
|
||||
x0 = fmod( w/2, gridSpacing );
|
||||
y0 = fmod( h/2, gridSpacing );
|
||||
}
|
||||
|
||||
painter->save();
|
||||
|
||||
painter->setClipPath( mModel->frame()->path() );
|
||||
|
||||
painter->setPen( QPen( gridLineColor, gridLineWidthPixels/mZoom ) );
|
||||
|
||||
for ( double x = x0; x < w; x += gridSpacing )
|
||||
{
|
||||
QGraphicsLineItem* lineItem = new QGraphicsLineItem( x, 0, x, h, clipItem );
|
||||
lineItem->setPen( pen );
|
||||
painter->drawLine( x, 0, x, h );
|
||||
}
|
||||
|
||||
for ( double y = y0; y < h; y += gridSpacing )
|
||||
{
|
||||
QGraphicsLineItem* lineItem = new QGraphicsLineItem( 0, y, w, y, clipItem );
|
||||
lineItem->setPen( pen );
|
||||
painter->drawLine( 0, y, w, y );
|
||||
}
|
||||
|
||||
mGridLayer->addToGroup( clipItem );
|
||||
painter->restore();
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Initialize Markup Layer
|
||||
///
|
||||
void View::initMarkupLayer()
|
||||
{
|
||||
clearLayer( mMarkupLayer );
|
||||
|
||||
QPen pen( markupLineColor );
|
||||
pen.setCosmetic( true );
|
||||
pen.setWidthF( markupLineWidthPixels );
|
||||
|
||||
const libglabels::Frame* frame = mModel->frame();
|
||||
|
||||
foreach (libglabels::Markup* markup, frame->markups() )
|
||||
{
|
||||
QGraphicsItem* markupItem = markup->createGraphicsItem( frame, pen );
|
||||
|
||||
mMarkupLayer->addToGroup( markupItem );
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Add Object to Object Layer
|
||||
///
|
||||
void View::addObjectToObjectLayer( LabelModelObject* object )
|
||||
{
|
||||
QGraphicsItem* item = object->createGraphicsItem();
|
||||
mObjectLayer->addToGroup( item );
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Initialize Foreground Layer
|
||||
///
|
||||
void View::initForegroundLayer()
|
||||
{
|
||||
clearLayer( mForegroundLayer );
|
||||
|
||||
QGraphicsPathItem *outlineItem = new QGraphicsPathItem( mModel->frame()->path() );
|
||||
|
||||
QPen pen( labelOutlineColor );
|
||||
pen.setJoinStyle( Qt::MiterJoin );
|
||||
pen.setCosmetic( true );
|
||||
pen.setWidthF( labelOutlineWidthPixels );
|
||||
outlineItem->setPen( pen );
|
||||
|
||||
mForegroundLayer->addToGroup( outlineItem );
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Initialize Select Region Layer
|
||||
///
|
||||
void View::initSelectRegionLayer()
|
||||
{
|
||||
clearLayer( mSelectRegionLayer );
|
||||
|
||||
mSelectRegionItem = new QGraphicsRectItem();
|
||||
|
||||
QBrush brush( selectRegionFillColor );
|
||||
mSelectRegionItem->setBrush( brush );
|
||||
|
||||
QPen pen( selectRegionOutlineColor );
|
||||
pen.setJoinStyle( Qt::MiterJoin );
|
||||
pen.setCosmetic( true );
|
||||
pen.setWidthF( selectRegionOutlineWidthPixels );
|
||||
mSelectRegionItem->setPen( pen );
|
||||
|
||||
mSelectRegionLayer->addToGroup( mSelectRegionItem );
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
///
|
||||
/// Draw Markup Layer
|
||||
///
|
||||
void
|
||||
glabels::View::drawMarkupLayer( QPainter* painter )
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user