QGraphicsItem

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

@@ -11,6 +11,8 @@ encoding//PyQtChart\u7EC3\u4E60/test/LineChart\u81EA\u5B9A\u4E49xy\u8F74.py=utf-
 encoding//PyQtChart\u7EC3\u4E60/test/ToolTip.py=utf-8
 encoding//PyQtChart\u7EC3\u4E60/test/ToolTip2.py=utf-8
 encoding//QGraphicsView\u7EC3\u4E60/ImageView.py=utf-8
+encoding//QGraphicsView\u7EC3\u4E60/QGraphicsItem/Item\u62D6\u62FD\u6539\u53D8\u5927\u5C0F.py=utf-8
+encoding//QGraphicsView\u7EC3\u4E60/QGraphicsItem/Item\u79FB\u52A8.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

QGraphicsView练习/QGraphicsItem/Item拖拽改变大小.py

@@ -0,0 +1,100 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Created on 2018年7月26日
+@author: Irony
+@site: https://github.com/892768447
+@email: 892768447@qq.com
+@file: QGraphicsView练习.QGraphicsItem.Item移动
+@description: 
+"""
+from PyQt5.QtCore import Qt, QLineF
+from PyQt5.QtGui import QPainter, QColor, QPen
+from PyQt5.QtWidgets import QGraphicsRectItem, QGraphicsView, QGraphicsScene,\
+    QStyle
+
+
+__Author__ = """By: Irony
+QQ: 892768447
+Email: 892768447@qq.com"""
+__Copyright__ = "Copyright (c) 2018 Irony"
+__Version__ = "Version 1.0"
+
+
+class MoveableItem(QGraphicsRectItem):
+
+    def __init__(self, *args, **kwargs):
+        super(MoveableItem, self).__init__(*args, **kwargs)
+        # 可移动,可选择,有焦点
+        self.setFlags(self.ItemIsMovable |
+                      self.ItemIsSelectable | self.ItemIsFocusable)
+        # 设置接收悬停事件
+        self.setAcceptHoverEvents(True)
+        self.setBrush(QColor(247, 160, 57))  # 设置背景颜色
+
+        # 是否在调整大小的状态
+        self.isResizing = False
+
+    def paint(self, painter, option, widget):
+        super(MoveableItem, self).paint(painter, option, widget)
+        # 当鼠标选中后在边缘绘制边框
+        if option.state & QStyle.State_Selected:
+            rect = self.boundingRect()
+            painter.setRenderHint(QPainter.Antialiasing, True)  # 抗锯齿
+            if option.state & QStyle.State_HasFocus:  # 有焦点
+                painter.setPen(QPen(Qt.red, 2))  # 设置红色画笔
+                painter.drawLines(  # 在左上、左下、右上、右下画8条小线段
+                    QLineF(rect.x(), rect.y(), rect.x()+10, rect.y()),  # 左上顶点向右
+                    QLineF(rect.x(), rect.y(), rect.x(), rect.y()+10),  # 左上顶点向下
+                    
+                    QLineF(rect.x(), rect.y()+rect.height(), rect.x()+10, rect.y()+rect.height()),  # 左下顶点向右
+                    QLineF(rect.x(), rect.y()+rect.height(), rect.x(), rect.y()+rect.height() - 10),  # 左下顶点向上
+                    
+                    QLineF(rect.width(), rect.y(), rect.width() - 10, rect.y()),  # 右上顶点向左
+                    QLineF(rect.width(), rect.y(), rect.width(), rect.y()+10),  # 右上顶点向下
+                    
+                    QLineF(rect.width(), rect.height(),
+                           rect.width() - 10, rect.height()),  # 右下顶点向左
+                    QLineF(rect.width(), rect.height(), rect.width(),
+                           rect.height() - 10)  # 右下顶点向上
+                )
+
+    def hoverMoveEvent(self, event):
+        super(MoveableItem, self).hoverMoveEvent(event)
+
+
+class ImageWidget(QGraphicsView):
+
+    def __init__(self, *args, **kwargs):
+        super(ImageWidget, self).__init__(*args, **kwargs)
+        self.resize(800, 600)
+        # 设置背景颜色
+        self.setBackgroundBrush(QColor(31, 31, 47))
+        # 去掉滚动条
+#         self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
+#         self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
+        # 设置变换中心为鼠标所在位置
+        self.setTransformationAnchor(self.AnchorUnderMouse)
+        # 不保证painter的状态
+        self.setOptimizationFlags(self.DontSavePainterState)
+        self.setViewportUpdateMode(self.SmartViewportUpdate)
+        self.setRenderHints(QPainter.Antialiasing |
+                            QPainter.SmoothPixmapTransform)
+
+        # 场景
+        self._scene = QGraphicsScene(0, 0, self.width(), self.height())
+        self.setScene(self._scene)
+
+        self._scene.addItem(MoveableItem(100, 100, 200, 200))
+
+
+if __name__ == '__main__':
+    import sys
+    import cgitb
+    sys.excepthook = cgitb.Hook(1, None, 5, sys.stderr, 'text')
+    from PyQt5.QtWidgets import QApplication
+    app = QApplication(sys.argv)
+    w = ImageWidget()
+    w.show()
+    sys.exit(app.exec_())

QGraphicsView练习/QGraphicsItem/Item移动.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Created on 2018年7月26日
+@author: Irony
+@site: https://github.com/892768447
+@email: 892768447@qq.com
+@file: QGraphicsView练习.QGraphicsItem.Item移动
+@description: 
+"""
+from PyQt5.QtGui import QPainter, QColor
+from PyQt5.QtWidgets import QGraphicsRectItem, QGraphicsView, QGraphicsScene
+
+
+__Author__ = """By: Irony
+QQ: 892768447
+Email: 892768447@qq.com"""
+__Copyright__ = "Copyright (c) 2018 Irony"
+__Version__ = "Version 1.0"
+
+
+class MoveableItem(QGraphicsRectItem):
+
+    def __init__(self, *args, **kwargs):
+        super(MoveableItem, self).__init__(*args, **kwargs)
+        self.setFlag(self.ItemIsMovable)  # 设置为可以动
+        self.setBrush(QColor(247, 160, 57))  # 设置背景颜色
+
+
+class ImageWidget(QGraphicsView):
+
+    def __init__(self, *args, **kwargs):
+        super(ImageWidget, self).__init__(*args, **kwargs)
+        self.resize(800, 600)
+        # 设置背景颜色
+        self.setBackgroundBrush(QColor(31, 31, 47))
+        # 去掉滚动条
+#         self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
+#         self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
+        # 设置变换中心为鼠标所在位置
+        self.setTransformationAnchor(self.AnchorUnderMouse)
+        # 不保证painter的状态
+        self.setOptimizationFlags(self.DontSavePainterState)
+        self.setViewportUpdateMode(self.SmartViewportUpdate)
+        self.setRenderHints(QPainter.Antialiasing |
+                            QPainter.SmoothPixmapTransform)
+
+        # 场景
+        self._scene = QGraphicsScene()
+        self.setScene(self._scene)
+        self.setSceneRect(0, 0, self.width(), self.height())
+
+        self._scene.addItem(MoveableItem(100, 100, 200, 200))
+
+
+if __name__ == '__main__':
+    import sys
+    from PyQt5.QtWidgets import QApplication
+    app = QApplication(sys.argv)
+    w = ImageWidget()
+    w.show()
+    sys.exit(app.exec_())