从任意对象(Python和Qt)向文本框发送文本
我需要能够从node.py中的类“node”发送文本:从任意对象(Python和Qt)向文本框发送文本,python,qt,Python,Qt,我需要能够从node.py中的类“node”发送文本: import datetime from PyQt4.QtCore import * from PyQt4.QtGui import * class node( QGraphicsItem ): def __init__( self, position, scene ): super( node, self ).__init__( None, scene ) self.setFlags( QGr
import datetime
from PyQt4.QtCore import *
from PyQt4.QtGui import *
class node( QGraphicsItem ):
def __init__( self, position, scene ):
super( node, self ).__init__( None, scene )
self.setFlags( QGraphicsItem.ItemIsSelectable | QGraphicsItem.ItemIsMovable )
self.rect = QRectF( -30, -30, 120, 60 )
self.setPos( position )
scene.clearSelection()
def sendFromNodeToBox( self, text ):
# how do i send text from here to textBox?
pass
def boundingRect( self ):
return self.rect
def paint( self, painter, option, widget ):
painter.setRenderHint( QPainter.Antialiasing )
pen = QPen( Qt.SolidLine )
pen.setColor( Qt.black )
pen.setWidth( 3 )
if option.state & QStyle.State_Selected:
#####################
self.sendFromNodeToBox( 'node selected' )
#####################
self.setZValue( 1 )
pen.setWidth( 4 )
pen.setColor( Qt.green )
else:
pen.setWidth( 3 )
self.setZValue( 0 )
painter.setPen( pen )
painter.setBrush( QColor( 200, 0, 0 ) )
painter.drawRoundedRect( self.rect, 10.0, 10.0 )
到由mainWindow.py加载的mainWindow.ui
中的状态框
import os, sip, sys, subprocess, platform
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PyQt4.uic import *
from PyQt4.QtOpenGL import *
from src.node import *
app = None
class mainWindow( QMainWindow ):
def __init__( self, parent = None ):
super( mainWindow, self ).__init__( parent )
self.currentPlatform = platform.system()
if self.currentPlatform == "Windows":
self.ui = loadUi( r'ui\mainWindow.ui', self )
elif self.currentPlatform == "Darwin":
self.ui = loadUi( r'ui/mainWindow.ui', self )
else:
print 'platform not supported'
quit()
# Scene view
self.scene = SceneView()
self.nodeDropGraphicsView.setViewport( QGLWidget( QGLFormat( QGL.SampleBuffers ) ) )
self.nodeDropGraphicsView.setScene( self.scene )
self.sendTextToBox( 'this text comes from mainWindow class, line 37 and 38.\n' )
self.sendTextToBox( 'press right mouse button.\n' )
def sendTextToBox( self, text ):
cursorBox = self.statusBox.textCursor()
cursorBox.movePosition(cursorBox.End)
cursorBox.insertText( str( text ) )
self.statusBox.ensureCursorVisible()
class SceneView( QGraphicsScene ):
def __init__( self, parent=None ):
super( SceneView, self ).__init__( parent )
text = self.addText( 'title' )
def mousePressEvent( self, event ):
pos = event.scenePos()
if event.button() == Qt.MidButton:
pass
elif event.button() == Qt.RightButton:
newNode = node( pos, self )
super( SceneView, self ).mousePressEvent( event )
def mouseReleaseEvent( self, event ):
print 'mouseReleaseEvent'
self.line = None
super( SceneView, self ).mouseReleaseEvent( event )
if __name__ == "__main__":
app = QApplication( sys.argv )
screenSize = QApplication.desktop().availableGeometry()
window = mainWindow()
window.resize( int( screenSize.width() ), int( screenSize.height() ) )
window.show()
app.exec_()
应用程序在win和osx上运行。Linux尚未测试
Python 2.7和Qt 4.8是必需的
有什么建议吗
完整资料来源如下:
非常感谢您的帮助。一种方法是在
SceneView
类中定义自定义信号,然后图形项可以通过其场景发射文本:
class node( QGraphicsItem ):
...
def sendFromNodeToBox( self, text ):
self.scene().textMessage.emit(text)
class SceneView( QGraphicsScene ):
textMessage = pyqtSignal(str)
class mainWindow( QMainWindow ):
def __init__( self, parent = None ):
...
self.scene = SceneView()
self.scene.textMessage.connect(self.sendTextToBox)
请内联源代码…你说的“发送文本”到底是什么意思?ekhumoro在这方面帮了我:)无论如何,谢谢