我对如何在用户加载的图片上进行单击和绘制矩形感到困惑。我找到了一些例子,但是我尝试跟随这些例子却没有任何效果,并且我不确定如何解决它。
我设置了一些断点,但似乎没有进入`mouseMoveEvent`函数,但我不知道原因。非常感谢您提供帮助。 我想要的 我想能够在我加载到QGraphics中的图片上单击并拖动,然后它会绘制一个框,并在状态栏中输出矩形两个点的X和Y坐标。我也希望矩形保留在那里,直到用户第二次单击图片。 我找到的例子 我想要的 简单示例 当前代码
我设置了一些断点,但似乎没有进入`mouseMoveEvent`函数,但我不知道原因。非常感谢您提供帮助。 我想要的 我想能够在我加载到QGraphics中的图片上单击并拖动,然后它会绘制一个框,并在状态栏中输出矩形两个点的X和Y坐标。我也希望矩形保留在那里,直到用户第二次单击图片。 我找到的例子 我想要的 简单示例 当前代码
class MainWindow(QMainWindow, Ui_MainWindow):
def __init__(self, *args, **kwargs):
QMainWindow.__init__(self, *args, **kwargs)
self.setupUi(self)
self.setUpMainUiFunction()
def setUpMainUiFunction(self):
self.actionOpen.triggered.connect(self.OpenDialog)
self.Button_LoadPhoto.clicked.connect(self.OpenDialog)
open = QAction(QIcon("icons/open.bmp"), "open", self)
save = QAction(QIcon("icons/save.bmp"), "save", self)
NormalCursor = QAction(QIcon("icons/cursor-normal.png"), "NormalCursor", self)
CrosshairCursor = QAction(QIcon("icons/crosshair.png"), "CrosshairCursor", self)
self.TopToolBar.addAction(open)
self.TopToolBar.addAction(save)
self.LeftToolBar.addAction(NormalCursor)
self.LeftToolBar.addAction(CrosshairCursor)
# self.TopToolBar.actionTriggered[QAction].connect(self.toolbtnpressed)
def OpenDialog(self):
options = QFileDialog.Options()
options |= QFileDialog.DontUseNativeDialog
PicturePath = QStandardPaths.standardLocations(QStandardPaths.PicturesLocation)[0]
filenames, _ = QFileDialog.getOpenFileNames(self, "Open File", PicturePath, "JPEG File (*.png)", options=options)
for filename in filenames:
pixmap = QPixmap(filename)
self.showPicture(pixmap)
self.statusbar.showMessage("Successfully Loaded: {}".format(filename))
def showPicture(self, picture):
sub = QMdiSubWindow(self)
loadPicture = LoadPicture(picture, sub)
sub.setWidget(loadPicture)
sub.setObjectName("Load_Picture_window")
sub.setWindowTitle("New Photo")
self.mdiArea.addSubWindow(sub)
sub.show()
sub.resize(picture.size())
loadPicture.log.MousePixmapSignal.connect(self.updatePixel)
def updatePixel(self, point, color):
self.UserInput_PixelValue_X.setText("{}".format(point.x()))
self.UserInput_PixelValue_Y.setText("{}".format(point.y()))
self.UserInput_PixelValue_R.setText("{}".format(color.red()))
self.UserInput_PixelValue_G.setText("{}".format(color.green()))
self.UserInput_PixelValue_B.setText("{}".format(color.blue()))
这是在另一个文件中的内容。
class LogObject(QObject):
MousePixmapSignal = pyqtSignal(QPoint, QColor)
class PictureItem(QGraphicsPixmapItem):
def __init__(self, log, *args, **kwargs):
QGraphicsPixmapItem.__init__(self, *args, **kwargs)
self.setAcceptHoverEvents(True)
self.log = log
def hoverMoveEvent(self, event):
point = event.pos().toPoint()
color = QColor(self.pixmap().toImage().pixel(point.x(), point.y()))
self.log.MousePixmapSignal.emit(point, color)
QGraphicsPixmapItem.hoverMoveEvent(self, event)
def hoverEnterEvent(self, event):
QApplication.setOverrideCursor(Qt.CrossCursor)
QGraphicsPixmapItem.hoverMoveEvent(self, event)
def hoverLeaveEvent(self, event):
QApplication.setOverrideCursor(Qt.ArrowCursor)
QGraphicsPixmapItem.hoverLeaveEvent(self, event)
def paintEvent(self, event):
qp = QPainter(self)
br = QBrush(QColor(100, 10, 10, 40))
qp.setBrush(br)
qp.drawRect(QRect(self.begin, self.end))
def mousePressEvent(self, event):
self.begin = event.pos()
self.end = event.pos()
QGraphicsPixmapItem.mousePressEvent(self, event)
self.update()
def mouseMoveEvent(self, event):
self.end = event.pos()
QGraphicsPixmapItem.mouseMoveEvent(self, event)
self.update()
def mouseReleaseEvent(self, event):
self.begin = event.pos()
self.end = event.pos()
QGraphicsPixmapItem.mouseReleaseEvent(self, event)
self.update()
class LoadPicture(QWidget, Ui_GraphicsArea):
def __init__(self, pixmap, parent=None):
QWidget.__init__(self, parent)
self.setupUi(self)
self.log = LogObject(self)
self.PictureArea.setScene(QGraphicsScene())
self.item = PictureItem(self.log, pixmap)
self.PictureArea.scene().addItem(self.item)
self.resize(pixmap.size())
TypeError
错误提示。 - laxer