142 lines
4.9 KiB
Objective-C
Executable File
142 lines
4.9 KiB
Objective-C
Executable File
/**
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**
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** @RDE_HEADER@
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** Virtual base class of a simple drop handler.
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** $Id$
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** $HeadURL$
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** $Author$
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**
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** -----------------------------------------------------------------------------------------------
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**
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** Hardware-Environment: Intel-PC
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** Software-Environment: Windows 7, Linux, Qt 5.4. ArcGIS 10.2.5
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**
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** Language ........: C++ 11
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**
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** -----------------------------------------------------------------------------------------------
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**
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** Author ...........: Jörg Turla, SPD G, Tel. 3132
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**
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** -----------------------------------------------------------------------------------------------
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**
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** Notes .........:
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**
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** 18.12.2015, JT : First edition for use with Qt5
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**
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** -----------------------------------------------------------------------------------------------
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*/
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#pragma once
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class QMimeData;
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namespace LtsWidgets
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{
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/**
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@class LtsDropHandler pdrophandler.h
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@brief Interface class to handle drop events of special mime data type.
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@see SituationMap::Map, SituationMap::DropEventManager
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The LtsDropHandler class is an interface class to handle drop event for one type of mime data. It is used from DropEventManager to process drop events.
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The DropEventManager will call the doDrop function to process events. The doDrop fuction has to be implemented in derived class.
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Following example shows how to implement a drop handler.
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@code
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#include <pwidgets/pdrophandler.h>
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class DropCreatePolyLine : public LtsWidgets::LtsDropHandler
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{
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PlanEditor * m_planEditor;
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PlanEditor::InternalData * m_planEditorInternal;
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bool m_smooth;
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public:
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DropCreatePolyLine( PlanEditor * planEditor
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, PlanEditor::InternalData * planEditorInternal
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, bool smooth = false )
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: LtsWidgets::LtsDropHandler()
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, m_planEditor(planEditor)
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, m_planEditorInternal(planEditorInternal)
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, m_smooth(smooth) {;}
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virtual ~DropCreatePolyLine() = default;
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void doDrop( int x, int y, const QMimeData * mimeData = nullptr) const override;
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}; // DropCreatePolyLine
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void PlanEditor::installLineDropHandler( LtsWidgets::LtsDragIcon * dragIcon )
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{
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qulonglong key = m_dropEventManager->add(new DropCreatePolyLine(this,m_internal));
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dragIcon->setDropHandlerKey( key );
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} // PlanEditor::installLineDropHandler( LtsWidgets::LtsDragIcon * dragIcon )
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void DropCreatePolyLine::doDrop( int x, int y, const QMimeData * mimeData ) const
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{
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SituationMap::Map * map;
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SituationMap::RB::RubberbandMultiPointFeature * rubberband;
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SituationMap::RB::RubberbandFactory & rbFactory;
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map = m_planEditorInternal->m_map;
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rbFactory = map->rubberbandFactory();
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if (m_smooth) rubberband = rbFactory.create<SituationMap::RB::RubberbandSmoothLine>();
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else rubberband = rbFactory.create<SituationMap::RB::RubberbandMultiPointFeature>();
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if (rubberband != nullptr)
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{
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rubberband -> setAutoDelete( true );
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rubberband -> enableClosed( false );
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uint dx = map->width() * 0.25;
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uint dy = map->height() * 0.25;
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QVector<QPointF> lineCoordinates;
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lineCoordinates += map->viewPortWindowPointToGeoCoordinate(QPoint(x-dx,y-dy));
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lineCoordinates += map->viewPortWindowPointToGeoCoordinate(QPoint(x+dx,y+dy));
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rubberband->setCoordinateVector( lineCoordinates );
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QObject::connect( rubberband , &SituationMap::RB::Rubberband::apply
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, m_planEditor, &PlanEditor::onPolylineCreate );
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QObject::connect( rubberband , &SituationMap::RB::Rubberband::abort
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, m_planEditor, &PlanEditor::onRubberbandAbort );
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} // DropCreatePolyLine::doDrop( int x, int y )
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} // DropCreatePolyLine::doDrop( int x, int y ) const
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@endcode
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*/
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class LtsDropHandler
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{
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public:
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LtsDropHandler() = default;
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virtual ~LtsDropHandler() = default;
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LtsDropHandler( const LtsDropHandler & ) = delete;
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LtsDropHandler & operator = ( const LtsDropHandler & ) = delete;
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/**
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Function to process drop events.
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@param x x coordinate of cursor position referred to widget pixel coordinates.
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@param y y coordinate of cursor position referred to widget pixel coordinates.
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@param mimeData Pointer to data to be dropped.
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*/
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virtual void doDrop( int x, int y, const QMimeData * mimeData ) const = 0;
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}; // class LtsDropHandler
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} // namespace LtsWidgets
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