简单图像处理

.settings/org.eclipse.core.resources.prefs

@@ -11,6 +11,8 @@ encoding//PyQtChart\u7EC3\u4E60/test/ToolTip2.py=utf-8
 encoding//QGraphicsView\u7EC3\u4E60/ImageView.py=utf-8
 encoding//QGraphicsView\u7EC3\u4E60/\u4E16\u754C\u5730\u56FE/WorldMap.py=utf-8
 encoding//QGraphicsView\u7EC3\u4E60/\u6DFB\u52A0QWidget.py=utf-8
+encoding//QGraphicsView\u7EC3\u4E60/\u7B80\u5355\u56FE\u50CF\u5904\u7406/SimpleImagePs.py=utf-8
+encoding//QGraphicsView\u7EC3\u4E60/\u7B80\u5355\u56FE\u50CF\u5904\u7406/SimpleImageView.py=utf-8
 encoding//tmp/Material/Effect/LineEffect.py=utf-8
 encoding//tmp/Material/Utils/Colors.py=utf-8
 encoding//tmp/Material/Utils/MaterialProperty.py=utf-8

QGraphicsView练习/简单图像处理/SimpleImagePs.py

@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Created on 2018年3月24日
+@author: Irony
+@site: https://github.com/892768447
+@email: 892768447@qq.com
+@file: SimpleImagePs
+@description: 图片查看
+"""
+from PyQt5.QtCore import Qt
+from PyQt5.QtWidgets import QMainWindow, QToolBar
+from QGraphicsView练习.简单图像处理.SimpleImageView import SimpleImageView
+
+
+__Author__ = """By: Irony
+QQ: 892768447
+Email: 892768447@qq.com"""
+__Copyright__ = 'Copyright (c) 2018 Irony'
+__Version__ = 1.0
+
+
+class MainWindow(QMainWindow):
+
+    def __init__(self, *args, **kwargs):
+        super(MainWindow, self).__init__(*args, **kwargs)
+        # 获取可用主屏桌面大小
+        screenRect = QApplication.instance().desktop().availableGeometry()
+        # 设置为桌面的2/3大
+        self.resize(
+            int(screenRect.width() * 2 / 3), int(screenRect.height() * 2 / 3))
+        # 初始化中心控件
+        self._imageView = SimpleImageView(self)
+        self.setCentralWidget(self._imageView)
+        # 初始化菜单栏
+        self._initMenuBar()
+        # 初始化工具条
+        self._initToolBar()
+
+    def _initMenuBar(self):
+        """菜单栏"""
+        menuBar = self.menuBar()
+        menu = menuBar.addMenu('文件')
+        menu.addAction('打开',self._imageView.loadImage)
+        menu.addAction('关闭')
+        menu.addAction('退出')
+
+    def _initToolBar(self):
+        """工具条"""
+        toolBar = QToolBar('工具栏', self)
+        self.addToolBar(Qt.LeftToolBarArea, toolBar)
+        toolBar.addAction('灰度')
+        toolBar.addAction('亮度')
+        toolBar.addAction('暖色调')
+        toolBar.addAction('冷色调')
+        toolBar.addAction('饱和度')
+        toolBar.addAction('模糊')
+        toolBar.addAction('锐化', self._ruihua)
+
+    def _ruihua(self):
+        print(self.sender())
+
+
+if __name__ == '__main__':
+    import sys
+    from PyQt5.QtWidgets import QApplication
+    app = QApplication(sys.argv)
+    app.setApplicationDisplayName('简单图片处理')
+    app.setApplicationName('简单图片处理')
+    app.setApplicationVersion('1.0')
+    w = MainWindow()
+    w.show()
+    sys.exit(app.exec_())

QGraphicsView练习/简单图像处理/SimpleImageView.py

@@ -0,0 +1,113 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Created on 2018年3月24日
+@author: Irony
+@site: https://github.com/892768447
+@email: 892768447@qq.com
+@file: SimpleImageView
+@description: 图片视图
+"""
+from PyQt5.QtCore import QStandardPaths, Qt
+from PyQt5.QtGui import QColor, QPainter, QPixmap
+from PyQt5.QtWidgets import QGraphicsView, QGraphicsScene, QFileDialog, \
+    QGraphicsItem
+try:
+    from PyQt5.QtOpenGL import QGLFormat  # , QGL, QGLWidget
+    hasOpenGL = True
+except Exception as e:
+    print(e)
+    hasOpenGL = False
+
+__Author__ = """By: Irony
+QQ: 892768447
+Email: 892768447@qq.com"""
+__Copyright__ = 'Copyright (c) 2018 Irony'
+__Version__ = 1.0
+
+
+class SimpleImageView(QGraphicsView):
+
+    # 背景区域颜色
+    backgroundColor = QColor(28, 31, 34)
+
+    def __init__(self, *args, **kwargs):
+        super(SimpleImageView, self).__init__(*args, **kwargs)
+        # 设置背景颜色
+        self.setBackgroundBrush(self.backgroundColor)
+        # 缓存背景
+        self.setCacheMode(self.CacheBackground)
+        # 设置拖拽样式
+        # self.setDragMode(self.ScrollHandDrag)
+        self.setRenderHints(
+            QPainter.Antialiasing | QPainter.TextAntialiasing | QPainter.SmoothPixmapTransform)
+        # opengl
+        if hasOpenGL and QGLFormat.hasOpenGL():
+            #             self.setViewport(QGLWidget(QGLFormat(QGL.SampleBuffers), self))
+            self.setRenderHint(QPainter.HighQualityAntialiasing)
+            self.setViewportUpdateMode(self.FullViewportUpdate)
+        else:
+            # 尝试通过分析需要重绘的区域来找到最佳的更新模式
+            self.setViewportUpdateMode(self.SmartViewportUpdate)
+        self._scene = QGraphicsScene(self)
+        self.setScene(self._scene)
+
+        # 图片item
+        self._itemImage = None
+
+    def keyReleaseEvent(self, event):
+        """按键处理事件"""
+        self._scaleImage(event)
+        super(SimpleImageView, self).keyReleaseEvent(event)
+
+    def closeEvent(self, event):
+        """窗口关闭时清空场景中的所有item"""
+        self._scene.clear()
+        self._itemImage = None
+        super(SimpleImageView, self).closeEvent(event)
+
+    def _scaleImage(self, event):
+        """缩放图片操作"""
+        if not self._itemImage:
+            return
+        scale = self._itemImage.scale()
+        if event.key() == Qt.Key_Plus:
+            # 放大
+            if scale >= 0.91:
+                return
+            self._itemImage.setScale(scale + 0.1)
+        elif event.key() == Qt.Key_Minus:
+            # 缩小
+            if scale <= 0.11:
+                return
+            self._itemImage.setScale(scale - 0.1)
+
+    def loadImage(self):
+        path, _ = QFileDialog.getOpenFileName(
+            self, '请选择图片', QStandardPaths.writableLocation(QStandardPaths.DesktopLocation), '图片文件(*.jpg *.png)')
+        if not path:
+            return
+        if self._itemImage:
+            # 删除以前的item
+            self._scene.removeItem(self._itemImage)
+            del self._itemImage
+        self._itemImage = self._scene.addPixmap(QPixmap(path))
+        self._itemImage.setFlag(QGraphicsItem.ItemIsMovable)
+        self._itemImage.setScale(0.1)  # 默认加载比例
+
+        size = self._itemImage.pixmap().size()
+        # 调整图片在中间
+        self._itemImage.setPos(
+            -size.width() * self._itemImage.scale() / 2,
+            -size.height() * self._itemImage.scale() / 2
+        )
+
+if __name__ == '__main__':
+    import sys
+    from PyQt5.QtWidgets import QApplication
+    app = QApplication(sys.argv)
+    w = SimpleImageView()
+    w.resize(800, 600)
+    w.show()
+    sys.exit(app.exec_())