我需要能够在背景图像顶部的屏幕上显示控件。我已经完成了该任务,并且已经创建并显示了一个控件(显示图像的 QLabel)。现在我需要能够通过将标签拖动到我希望移动它的位置来移动标签,我已经遵循了几个关于在 pyqt 中拖动的教程,但我未能完成这项任务
这是我的代码。注意控件可以移动,但是当你移动它时,背景也会移动,当你放下它时,它会保持在原来的位置。我想要的是只移动控件(显示图像的 QLabel)并移动它只是在选项卡内拖动:
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
class CentralWidget(QFrame):
def __init__(self, *args):
super(CentralWidget, self).__init__(*args)
self.setStyleSheet("background-image: url(logo.png);")
self.setAcceptDrops(True)
def dragEnterEvent(self, e):
e.accept()
def dropEvent(self, e):
# get the relative position from the mime data
mime = e.mimeData().text()
x, y = map(int, mime.split(','))
# move
# so move the dragged button (i.e. event.source())
e.source().move(e.pos()-QPoint(x, y))
# set the drop action as Move
e.setDropAction(Qt.MoveAction)
# tell the QDrag we accepted it
e.accept()
class Selector(QLabel):
def mouseMoveEvent(self, e):
if e.buttons() != Qt.LeftButton:
return
# write the relative cursor position to mime data
mimeData = QMimeData()
# simple string with 'x,y'
mimeData.setText('%d,%d' % (e.x(), e.y()))
# let's make it fancy. we'll show a "ghost" of the button as we drag
# grab the button to a pixmap
pixmap = QPixmap.grabWidget(self)
# below makes the pixmap half transparent
painter = QPainter(pixmap)
painter.setCompositionMode(painter.CompositionMode_DestinationIn)
painter.fillRect(pixmap.rect(), QColor(0, 0, 0, 127))
painter.end()
# make a QDrag
drag = QDrag(self)
# put our MimeData
drag.setMimeData(mimeData)
# set its Pixmap
drag.setPixmap(pixmap)
# shift the Pixmap so that it coincides with the cursor position
drag.setHotSpot(e.pos())
# start the drag operation
# exec_ will return the accepted action from dropEvent
if drag.exec_(Qt.MoveAction) == Qt.MoveAction:
print 'moved'
# else:
# print 'copied'
def mousePressEvent(self, e):
QLabel.mousePressEvent(self,e)
if e.button() == Qt.LeftButton:
print 'press'
class fPrincipal(QMainWindow):
def __init__(self, parent=None):
# Call base class constructor
QMainWindow.__init__(self, parent)
self.setGeometry(QRect(0, 0, 599+10, 399+10))
self.move(QDesktopWidget().availableGeometry().center() - self.frameGeometry().center())
# Creamos el contenedor central, que sera organizado por pestañas
centralWidget = QTabWidget()
self.setCentralWidget(centralWidget);
# Creamos la 1ra pestaña
tab = CentralWidget()
tabLayout = QHBoxLayout()
tab.setLayout(tabLayout)
# Añadimos la pestaña al contenedor central
centralWidget.addTab(tab,"Escena 1")
logDockWidget = QDockWidget("Tools", self)
logDockWidget.setObjectName("LogDockWidget")
logDockWidget.setAllowedAreas(Qt.LeftDockWidgetArea | Qt.RightDockWidgetArea)
self.addDockWidget(Qt.RightDockWidgetArea, logDockWidget)
def crearMenu():
mimenu = self.menuBar().addMenu("&Archivo")
crearMenu()
selectorLb = Selector()
picture = QPixmap('D:\Adrian\Tesis\Codigo\selector.png')
selectorLb.setPixmap(picture)
tabLayout.addWidget(selectorLb)
if __name__ == "__main__":
app = QApplication(sys.argv)
w = fPrincipal()
w.show()
sys.exit(app.exec_())