PySide範囲選択テスト

selwin.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
from PySide import QtCore, QtGui
from PySide.QtCore import Qt
import selwinui

class SelRect(QtGui.QGraphicsRectItem):
    def __init__(self, *args):
        super(SelRect, self).__init__(*args)
    
    def paint(self, painter, option, widget):
        # painter.eraseRect(self.boundingRect())
        painter.setCompositionMode(QtGui.QPainter.RasterOp_SourceXorDestination)
        pen = QtGui.QPen(Qt.white)
        pen.setWidth(10)
        painter.setBrush(Qt.NoBrush)
        painter.setPen(pen)
        painter.drawRect(self.boundingRect().adjusted(5, 5, -5, -5))

class MyScene(QtGui.QGraphicsScene):
    def __init__(self, *args):
        super(MyScene, self).__init__(*args)
    
    def mouseReleaseEvent(self, event):
        if event.button() == Qt.LeftButton:
            r = SelRect()
            r.setRect(QtCore.QRect(event.buttonDownScenePos(Qt.LeftButton).toPoint(),
                    event.scenePos().toPoint()).normalized())
            self.addItem(r)


class MyWidget(QtGui.QWidget):
    def __init__(self, *args):
        super(MyWidget, self).__init__(*args)
        self.image = None
        self.setMouseTracking(True)
        self._pos = None
        
    def loadImage(self, name):
        self.image = QtGui.QImage(name)
        self.setFixedSize(self.image.size())
    
    def mouseMoveEvent(self, event):
        p = event.pos()
        if not self._pos or p != self._pos:
            sp = self._pos
            self._pos = p
            if sp:
                self.update(0, 0, max(p.x(), sp.x()), max(p.y(), sp.y()))
    
    def paintEvent(self, event):
        painter = QtGui.QPainter(self)
        if self.image:
            painter.drawImage(0, 0, self.image)
        if self._pos:
            # print self._pos
            painter.setCompositionMode(QtGui.QPainter.RasterOp_SourceXorDestination)
            pen = QtGui.QPen(Qt.white)
            pen.setWidth(10)
            painter.setPen(pen)
            painter.setBrush(Qt.NoBrush)
            # painter.setBrush(Qt.cyan)
            rect = QtCore.QRect(0, 0, self._pos.x(), self._pos.y())
            rect.adjust(5, 5, -5, -5)
            painter.drawRect(rect)

class MainWindow(QtGui.QMainWindow, selwinui.Ui_MainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setupUi(self)
        
        img = QtGui.QImage('selwin.png')
        self.pixmap = QtGui.QPixmap.fromImage(img)
        scene = MyScene(self)
        scene.addPixmap(self.pixmap)
        self.graphicsView.setScene(scene)
        self.scene = scene
        
        w = MyWidget(self.scrollArea)
        w.loadImage('selwin.png')
        self.scrollArea.setWidget(w)
        
        self.actionOpen.triggered.connect(self.open)
    
    def eventFilter(self, object, event):
        print type(event), event.type()
        # if event.type() == QtCore.QEvent.GraphicsSceneMouseRelease:
            # p0 = event.buttonDownScenePos(Qt.LeftButton)
            # p1 = event.scenePos()
            # print p0, p1

    def open(self):
        QtGui.QMessageBox.information(self, u'Post', u'送信しました')
    
if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())

selwin.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>583</width>
    <height>497</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QScrollArea" name="scrollArea">
      <property name="widgetResizable">
       <bool>true</bool>
      </property>
      <widget class="QWidget" name="scrollAreaWidgetContents">
       <property name="geometry">
        <rect>
         <x>0</x>
         <y>0</y>
         <width>561</width>
         <height>204</height>
        </rect>
       </property>
      </widget>
     </widget>
    </item>
    <item>
     <widget class="QGraphicsView" name="graphicsView"/>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>583</width>
     <height>18</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
  <widget class="QToolBar" name="toolBar">
   <property name="windowTitle">
    <string>toolBar</string>
   </property>
   <attribute name="toolBarArea">
    <enum>TopToolBarArea</enum>
   </attribute>
   <attribute name="toolBarBreak">
    <bool>false</bool>
   </attribute>
   <addaction name="actionOpen"/>
  </widget>
  <action name="actionOpen">
   <property name="text">
    <string>開く</string>
   </property>
  </action>
 </widget>
 <resources/>
 <connections/>
</ui>