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https://github.com/huderlem/porymap.git
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59 lines
2.4 KiB
C++
59 lines
2.4 KiB
C++
#ifndef SELECTABLEPIXMAPITEM_H
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#define SELECTABLEPIXMAPITEM_H
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#include <QGraphicsPixmapItem>
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#include <QGraphicsSceneMouseEvent>
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class SelectablePixmapItem : public QObject, public QGraphicsPixmapItem {
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Q_OBJECT
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public:
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SelectablePixmapItem(const QSize &size, const QSize &maxSelectionSize = QSize(INT_MAX, INT_MAX))
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: SelectablePixmapItem(size.width(), size.height(), maxSelectionSize.width(), maxSelectionSize.height()) {}
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SelectablePixmapItem(int cellWidth, int cellHeight, int maxSelectionWidth = INT_MAX, int maxSelectionHeight = INT_MAX)
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: cellWidth(cellWidth),
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cellHeight(cellHeight),
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maxSelectionWidth(maxSelectionWidth),
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maxSelectionHeight(maxSelectionHeight),
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selectionInitialX(0),
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selectionInitialY(0),
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selectionOffsetX(0),
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selectionOffsetY(0)
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{}
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virtual QSize getSelectionDimensions() const { return QSize(abs(this->selectionOffsetX) + 1, abs(this->selectionOffsetY) + 1); }
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virtual void draw() = 0;
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virtual void setMaxSelectionSize(const QSize &size) { setMaxSelectionSize(size.width(), size.height()); }
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virtual void setMaxSelectionSize(int width, int height);
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QSize maxSelectionSize() { return QSize(this->maxSelectionWidth, this->maxSelectionHeight); }
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protected:
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int cellWidth;
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int cellHeight;
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int maxSelectionWidth;
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int maxSelectionHeight;
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int selectionInitialX;
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int selectionInitialY;
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int selectionOffsetX;
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int selectionOffsetY;
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QPoint getSelectionStart();
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void select(const QPoint &pos, const QSize &size = QSize(1,1));
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void select(int x, int y, int width = 1, int height = 1) { select(QPoint(x, y), QSize(width, height)); }
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void updateSelection(const QPoint &pos);
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QPoint getCellPos(QPointF);
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virtual void mousePressEvent(QGraphicsSceneMouseEvent*) override;
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virtual void mouseMoveEvent(QGraphicsSceneMouseEvent*) override;
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virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent*) override;
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virtual void drawSelection();
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virtual int cellsWide() const { return this->cellWidth ? (pixmap().width() / this->cellWidth) : 0; }
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virtual int cellsTall() const { return this->cellHeight ? (pixmap().height() / this->cellHeight) : 0; }
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signals:
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void selectionChanged(const QPoint&, const QSize&);
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private:
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QPoint prevCellPos = QPoint(-1,-1);
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};
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#endif // SELECTABLEPIXMAPITEM_H
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