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ui/qg_blockwidget.h

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+/****************************************************************************
+**
+** This file is part of the LibreCAD project, a 2D CAD program
+**
+** Copyright (C) 2011 Rallaz (rallazz@gmail.com)
+** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
+**
+**
+** This file 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 2 of the License, or
+** (at your option) any later version.
+**
+** 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_BLOCKWIDGET_H
+#define QG_BLOCKWIDGET_H
+
+#include <QWidget>
+#include <QIcon>
+#include <QAbstractTableModel>
+#include <QItemSelection>
+
+#include "rs_blocklistlistener.h"
+
+class QG_ActionHandler;
+class QTableView;
+class QLineEdit;
+
+
+/**
+ * Implementation of a model to use in QG_BlockWidget
+ */
+class QG_BlockModel: public QAbstractTableModel {
+public:
+    enum {
+        VISIBLE,
+        NAME,
+        LAST
+    };
+    QG_BlockModel(QObject * parent = 0);
+	~QG_BlockModel() = default;
+    Qt::ItemFlags flags ( const QModelIndex & /*index*/ ) const {
+            return Qt::ItemIsSelectable|Qt::ItemIsEnabled;}
+    int columnCount(const QModelIndex &/*parent*/) const {return LAST;}
+    int rowCount ( const QModelIndex & parent = QModelIndex() ) const;
+    QVariant data ( const QModelIndex & index, int role = Qt::DisplayRole ) const;
+    QModelIndex parent ( const QModelIndex & index ) const;
+    QModelIndex index ( int row, int column, const QModelIndex & parent = QModelIndex() ) const;
+    void setBlockList(RS_BlockList* bl);
+    RS_Block *getBlock( int row );
+    QModelIndex getIndex (RS_Block * blk);
+
+    RS_Block* getActiveBlock() { return activeBlock; };
+    void setActiveBlock(RS_Block* b) { activeBlock = b; };
+
+private:
+    QList<RS_Block*> listBlock;
+    QIcon blockVisible;
+    QIcon blockHidden;
+    RS_Block* activeBlock {nullptr};
+};
+
+
+/**
+ * This is the Qt implementation of a widget which can view a 
+ * block list.
+ */
+class QG_BlockWidget: public QWidget, public RS_BlockListListener {
+    Q_OBJECT
+
+public:
+    QG_BlockWidget(QG_ActionHandler* ah, QWidget* parent,
+                   const char* name=0, Qt::WindowFlags f = 0);
+    ~QG_BlockWidget();
+
+    void setBlockList(RS_BlockList* blockList) {
+        this->blockList = blockList;
+        update();
+    }
+
+    RS_BlockList* getBlockList() {
+        return blockList;
+    }
+
+    void update();
+    void activateBlock(RS_Block* block);
+
+    virtual void blockAdded(RS_Block*);
+
+    virtual void blockEdited(RS_Block*) {
+        update();
+    }
+    virtual void blockRemoved(RS_Block*) {
+        update();
+    }
+    virtual void blockToggled(RS_Block*) {
+		update();
+	}
+
+signals:
+	void escape();
+
+public slots:
+    void slotActivated(QModelIndex blockIdx);
+    void slotSelectionChanged(
+        const QItemSelection &selected,
+        const QItemSelection &deselected);
+    void slotUpdateBlockList();
+
+protected:
+    void contextMenuEvent(QContextMenuEvent *e);
+	virtual void keyPressEvent(QKeyEvent* e);
+
+private:
+    RS_BlockList* blockList;
+    QLineEdit* matchBlockName;
+    QTableView* blockView;
+    QG_BlockModel *blockModel;
+    RS_Block* lastBlock;
+
+    QG_ActionHandler* actionHandler;
+
+    void restoreSelections();
+};
+
+#endif