class IconEditor : public QWidget
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#ifndef ICONEDITOR_H#define ICONEDITOR_H#include <QColor>#include <QImage>#include <QWidget>class IconEditor : public QWidget{ Q_OBJECT Q_PROPERTY(QColor penColor READ penColor WRITE setPenColor) Q_PROPERTY(QImage iconImage READ iconImage WRITE setIconImage) Q_PROPERTY(int zoomFactor READ zoomFactor WRITE setZoomFactor)public: IconEditor(QWidget *parent = 0); void setPenColor(const QColor &newColor); QColor penColor() const { return curColor; } void setZoomFactor(int newZoom); int zoomFactor() const { return zoom; } void setIconImage(const QImage &newImage); QImage iconImage() const { return image; } QSize sizeHint() const;protected: void mousePressEvent(QMouseEvent *event); void mouseMoveEvent(QMouseEvent *event); void paintEvent(QPaintEvent *event);private: void setImagePixel(const QPoint &pos, bool opaque); QRect pixelRect(int i, int j) const; QColor curColor; QImage image; int zoom;};#endif#include <QtGui>#include "iconeditor.h"IconEditor::IconEditor(QWidget *parent) : QWidget(parent){ setAttribute(Qt::WA_StaticContents); setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum); curColor = Qt::black; zoom = 8; image = QImage(16, 16, QImage::Format_ARGB32); image.fill(qRgba(0, 0, 0, 0));}void IconEditor::setPenColor(const QColor &newColor){ curColor = newColor;}void IconEditor::setZoomFactor(int newZoom){ if (newZoom < 1) newZoom = 1; if (newZoom != zoom) { zoom = newZoom; update(); updateGeometry(); }}void IconEditor::setIconImage(const QImage &newImage){ if (newImage != image) { image = newImage.convertToFormat(QImage::Format_ARGB32); update(); updateGeometry(); }}QSize IconEditor::sizeHint() const{ QSize size = zoom * image.size(); if (zoom >= 3) size += QSize(1, 1); return size;}void IconEditor::mousePressEvent(QMouseEvent *event){ if (event->button() == Qt::LeftButton) { setImagePixel(event->pos(), true); } else if (event->button() == Qt::RightButton) { setImagePixel(event->pos(), false); }}void IconEditor::mouseMoveEvent(QMouseEvent *event){ if (event->buttons() & Qt::LeftButton) { setImagePixel(event->pos(), true); } else if (event->buttons() & Qt::RightButton) { setImagePixel(event->pos(), false); }}void IconEditor::paintEvent(QPaintEvent *event){ QPainter painter(this); if (zoom >= 3) { painter.setPen(palette().foreground().color()); for (int i = 0; i <= image.width(); ++i) painter.drawLine(zoom * i, 0, zoom * i, zoom * image.height()); for (int j = 0; j <= image.height(); ++j) painter.drawLine(0, zoom * j, zoom * image.width(), zoom * j); } for (int i = 0; i < image.width(); ++i) { for (int j = 0; j < image.height(); ++j) { QRect rect = pixelRect(i, j); if (!event->region().intersect(rect).isEmpty()) { QColor color = QColor::fromRgba(image.pixel(i, j)); if (color.alpha() < 255) painter.fillRect(rect, Qt::white); painter.fillRect(rect, color); } } }}void IconEditor::setImagePixel(const QPoint &pos, bool opaque){ int i = pos.x() / zoom; int j = pos.y() / zoom; if (image.rect().contains(i, j)) { if (opaque) { image.setPixel(i, j, penColor().rgba()); } else { image.setPixel(i, j, qRgba(0, 0, 0, 0)); } update(pixelRect(i, j)); }}QRect IconEditor::pixelRect(int i, int j) const{ if (zoom >= 3) { return QRect(zoom * i + 1, zoom * j + 1, zoom - 1, zoom - 1); } else { return QRect(zoom * i, zoom * j, zoom, zoom); }}
