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ui/qg_graphicview.h

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+/****************************************************************************
+**
+** This file is part of the LibreCAD project, a 2D CAD program
+**
+** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
+** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
+**
+**
+** This file may be distributed and/or modified under the terms of the
+** GNU General Public License version 2 as published by the Free Software 
+** Foundation and appearing in the file gpl-2.0.txt included in the
+** packaging of this file.
+**
+** This program 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 this program; if not, write to the Free Software
+** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+**
+** This copyright notice MUST APPEAR in all copies of the script!  
+**
+**********************************************************************/
+
+#ifndef QG_GRAPHICVIEW_H
+#define QG_GRAPHICVIEW_H
+
+#include <QWidget>
+
+#include "rs_graphicview.h"
+#include "rs_layerlistlistener.h"
+#include "rs_blocklistlistener.h"
+
+class QGridLayout;
+class QLabel;
+class QMenu;
+
+class QG_ScrollBar;
+
+/**
+ * This is the Qt implementation of a widget which can view a 
+ * graphic. 
+ *
+ * Instances of this class can be linked to layer lists using
+ * addLayerListListener().
+ */
+class QG_GraphicView:   public RS_GraphicView,
+                        public RS_LayerListListener,
+                        public RS_BlockListListener
+{
+    Q_OBJECT
+
+public:
+    QG_GraphicView(QWidget* parent = 0, Qt::WindowFlags f = 0, RS_Document* doc = 0);
+	~QG_GraphicView() override;
+
+	int getWidth() const override;
+	int getHeight() const override;
+	void redraw(RS2::RedrawMethod method=RS2::RedrawAll) override;
+	void adjustOffsetControls() override;
+	void adjustZoomControls() override;
+	void setBackground(const RS_Color& bg) override;
+	void setMouseCursor(RS2::CursorType c) override;
+	void updateGridStatusWidget(const QString& text) override;
+
+	virtual	void getPixmapForView(std::unique_ptr<QPixmap>& pm);
+		
+    // Methods from RS_LayerListListener Interface:
+	void layerEdited(RS_Layer*) override{
+        redraw(RS2::RedrawDrawing); 
+    }
+	void layerRemoved(RS_Layer*) override{
+        redraw(RS2::RedrawDrawing); 
+    }
+	void layerToggled(RS_Layer*) override{
+        redraw(RS2::RedrawDrawing); 
+    }
+	void layerActivated(RS_Layer *) override;
+    /**
+     * @brief setOffset
+     * @param ox, offset X
+     * @param oy, offset Y
+     */
+	void setOffset(int ox, int oy) override;
+    /**
+     * @brief getMousePosition() mouse position in widget coordinates
+     * @return the cursor position in widget coordinates
+     * returns the widget center, if cursor is not on the widget
+     */
+	RS_Vector getMousePosition() const override;
+
+    void setAntialiasing(bool state);
+    void setCursorHiding(bool state);
+    void addScrollbars();
+    bool hasScrollbars();
+
+    void setCurrentQAction(QAction* q_action);
+
+    QString device;
+
+    void destroyMenu(const QString& activator);
+    void setMenu(const QString& activator, QMenu* menu);
+
+protected:
+	void mousePressEvent(QMouseEvent* e) override;
+	void mouseDoubleClickEvent(QMouseEvent* e) override;
+	void mouseReleaseEvent(QMouseEvent* e) override;
+	void mouseMoveEvent(QMouseEvent* e) override;
+	void tabletEvent(QTabletEvent* e) override;
+	void leaveEvent(QEvent*) override;
+	void enterEvent(QEvent*) override;
+	void focusInEvent(QFocusEvent*) override;
+	void focusOutEvent(QFocusEvent*) override;
+	void wheelEvent(QWheelEvent* e) override;
+	void keyPressEvent(QKeyEvent* e) override;
+	void keyReleaseEvent(QKeyEvent* e) override;
+
+	bool event(QEvent * e) override;
+
+	void paintEvent(QPaintEvent *)override;
+	void resizeEvent(QResizeEvent* e) override;
+
+    QList<QAction*> recent_actions;
+
+private slots:
+    void slotHScrolled(int value);
+    void slotVScrolled(int value);
+
+protected:
+    //! Horizontal scrollbar.
+    QG_ScrollBar* hScrollBar;
+    //! Vertical scrollbar.
+    QG_ScrollBar* vScrollBar;
+    //! Layout used to fit in the view and the scrollbars.
+    QGridLayout* layout;
+    //! CAD mouse cursor
+    std::unique_ptr<QCursor> curCad;
+    //! Delete mouse cursor
+    std::unique_ptr<QCursor> curDel;
+    //! Select mouse cursor
+    std::unique_ptr<QCursor> curSelect;
+    //! Magnifying glass mouse cursor
+    std::unique_ptr<QCursor> curMagnifier;
+    //! Hand mouse cursor
+    std::unique_ptr<QCursor> curHand;
+		
+	// Used for buffering different paint layers
+	std::unique_ptr<QPixmap> PixmapLayer1;  // Used for grids and absolute 0
+    std::unique_ptr<QPixmap> PixmapLayer2;  // Used for the actual CAD drawing
+    std::unique_ptr<QPixmap> PixmapLayer3;  // Used for crosshair and actionitems
+	
+	RS2::RedrawMethod redrawMethod;
+		
+    //! Keep tracks of if we are currently doing a high-resolution scrolling
+    bool isSmoothScrolling;
+
+    QMap<QString, QMenu*> menus;
+
+private:
+    bool antialiasing{false};
+    bool scrollbars{false};
+    bool cursor_hiding{false};
+
+
+signals:
+    void xbutton1_released();
+    void gridStatusChanged(const QString&);
+};
+
+#endif