PySide：即时工具提示（在显示工具提示之前没有延迟）

Question

我建造的工具使用工具提示在您点击之前显示有关文件的额外信息。如果有人能够提供一些有关如何实现这一目标的见解，那就太棒了。我在PySide工作了大约一个月，所以我无法解读我在网上发现的这些高级示例/答案，所以一个带有一些注释的简单代码示例将帮助我解决很多问题。

这是我到目前为止所拥有的。我不知道在事件发生时我做了什么，所以这是我能用我的代码示例做的最好的事情：

from PySide import QtCore, QtGui
from shiboken import wrapInstance
import maya.OpenMayaUI as mui

def get_parent():
    ptr = mui.MQtUtil.mainWindow()
    return wrapInstance( long( ptr ), QtGui.QWidget )   

############################################        
''' Classes '''
############################################
class Main_Window( QtGui.QDialog ):
    def __init__( self, parent=get_parent() ):
        super( Main_Window, self ).__init__( parent )

        self.setMouseTracking(True)                                      # Set tracking

        self.create_gui()
        self.create_layout()
        self.create_connections()
        self.get_contents()
        self.shapeItems = []


    #--------------------------------------------------------------------  # Mouse things
    def mouseMoveEvent(self, event):
        if (event.buttons() & QtCore.Qt.LeftButton):
            self.moveItemTo(event.pos())  

    #--------------------------------------------------------------------  # Mouse things
    def event(self, event):
        if event.type() == QtCore.QEvent.ToolTip:
            helpEvent = event
            index = self.itemAt(helpEvent.pos())
            if index != -1:
                QtGui.QToolTip.showText(helpEvent.globalPos(), self.shapeItems[index].toolTip())
            else:
                QtGui.QToolTip.hideText()
                event.ignore()

            return True

        return super(Main_Window, self).event(event)

    #--------------------------------------------------------------------
    def create_gui( self ):
        self.tv_model=MyModel()
        self.tv_file_list = File_List( self )

    #--------------------------------------------------------------------
    def create_layout( self ):
        self.main_layout = QtGui.QVBoxLayout( self )
        self.main_layout.addWidget( self.tv_file_list )
        self.setLayout( self.main_layout )

    #--------------------------------------------------------------------
    def get_contents(self):
        self.tv_model.clear()
        self.tv_model.setHorizontalHeaderLabels(["name","date"])
        contents=["path1","path2"]
        for path in contents:
            date = self.get_date(path)
            self.add_file(path,date)
        self.tv_file_list.setColumnWidth(0, 150)

    #--------------------------------------------------------------------
    def add_file(self, name, date):
        name = QtGui.QStandardItem(name)
        name.setToolTip(name.text())
        name.setIcon(self.style().standardIcon(QtGui.QStyle.SP_DirOpenIcon))
        date = QtGui.QStandardItem(date)
        self.tv_model.appendRow([name, date])

    #--------------------------------------------------------------------
    def get_date(self, path):
        return "a date"

    #--------------------------------------------------------------------
    def create_connections( self ):
        self.tv_file_list.clicked.connect( self.on_click )

    # slots --------------------------------------------------------------
    def on_click(self, item ):
        index = self.tv_file_list.selectedIndexes()[0]
        item = self.tv_model.itemFromIndex(index).text()
        print item

############################################
class MyModel(QtGui.QStandardItemModel):
    def __init__(self, parent=None):
        super(MyModel, self).__init__(parent)

    #--------------------------------------------------------------------
    def flags(self, index):
        flag = QtCore.Qt.ItemIsEnabled
        if index.isValid():
            flag |= QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsUserCheckable 
        return flag

############################################
class File_List( QtGui.QTreeView ):
    ''' Create the file filters '''
    def __init__( self, mainUIWindow, parent=get_parent() ):
        super( File_List, self ).__init__( parent )

        self.setModel(mainUIWindow.tv_model)
        self.setIndentation(0)
        self.setColumnWidth(0,500)
        self.setFocusPolicy(QtCore.Qt.NoFocus)
        self.setStyleSheet("QToolTip { color: rgb(170,170,170); background-color: rgb(20,20,20); border: 1px rgb(20,20,20); }")


############################################
if __name__ == "__main__":
    # workaround for a bug in maya
    try:
        tree_view_ui.close()
        tree_view_ui.deleteLater()
    except:
        pass

    tree_view_ui = Main_Window()
    tree_view_ui.show()

    try:
        tree_view_ui.show()
    except:
        tree_view_ui.close()
        tree_view_ui.deleteLater()

HERE是一篇描述如何创建即时工具提示的帖子，但没有任何代码示例我不知道如何编写它。文档也没有多大的帮助（它确实应该有初学者的简单例子）。

HERE是一个显示如何实现鼠标移动事件的代码，但我还没有能够在上面的示例中使用它。我不断收到错误：＆＃34; TypeError：super（type，obj）：obj必须是＆＃34;的类型的实例或子类型。和＆＃34;属性错误：＆＃39; Main_Window＆＃39;对象没有属性＆＃39; itemAt＆＃39;＆＃34;

同样，任何帮助或想法都会很棒。谢谢

解

from PySide import QtCore, QtGui
from shiboken import wrapInstance
import maya.OpenMayaUI as mui

def get_parent():
    ptr = mui.MQtUtil.mainWindow()
    return wrapInstance( long( ptr ), QtGui.QWidget )   

############################################        
''' Classes '''
############################################
class Main_Window( QtGui.QDialog ):
    def __init__( self, parent=get_parent() ):
        super( Main_Window, self ).__init__( parent )

        self.create_gui()
        self.create_layout()
        self.create_connections()
        self.get_contents()

    #--------------------------------------------------------------------
    def create_gui( self ):
        self.tv_model=MyModel()
        self.tv_file_list = File_List( self )
        self.tv_file_list.setMouseTracking(True)                 # Set mouse tracking

    #--------------------------------------------------------------------
    def create_layout( self ):
        self.main_layout = QtGui.QVBoxLayout( self )
        self.main_layout.addWidget( self.tv_file_list )
        self.setLayout( self.main_layout )

    #--------------------------------------------------------------------
    def get_contents(self):
        self.tv_model.clear()
        self.tv_model.setHorizontalHeaderLabels(["name","date"])
        contents=["path1","path2"]
        for path in contents:
            date = self.get_date(path)
            self.add_file(path,date)
        self.tv_file_list.setColumnWidth(0, 150)

    #--------------------------------------------------------------------
    def add_file(self, name, date):
        name = QtGui.QStandardItem(name)
        user = "me"
        name.setToolTip("<b>{0}</b><br><b>{1}</b>".format(name.text(), user) ) # Here's where I set the tooltip
        name.setIcon(self.style().standardIcon(QtGui.QStyle.SP_DirOpenIcon))
        date = QtGui.QStandardItem(date)
        self.tv_model.appendRow([name, date])


    #--------------------------------------------------------------------
    def get_date(self, path):
        return "a date"


    #--------------------------------------------------------------------
    def create_connections( self ):
        self.tv_file_list.clicked.connect( self.on_click )
        self.tv_file_list.entered.connect( self.handleItemEntered )  # New connection

    # slots --------------------------------------------------------------
    def on_click(self, item ):
        index = self.tv_file_list.selectedIndexes()[0]
        item = self.tv_model.itemFromIndex(index).text()
        print item

    #--------------------------------------------------------------------
    def handleItemEntered(self, index):                                        # New slot
        if index.isValid():
            QtGui.QToolTip.showText(
                QtGui.QCursor.pos(),
                index.data(),
                self.tv_file_list.viewport(),
                self.tv_file_list.visualRect(index)
                )


############################################
class MyModel(QtGui.QStandardItemModel):
    def __init__(self, parent=None):
        super(MyModel, self).__init__(parent)

    def flags(self, index):
        flag = QtCore.Qt.ItemIsEnabled
        if index.isValid():
            flag |= QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsUserCheckable 
        return flag

############################################
class File_List( QtGui.QTreeView ):
    ''' Create the file filters '''
    def __init__( self, mainUIWindow, parent=get_parent() ):
        super( File_List, self ).__init__( parent )

        self.setModel(mainUIWindow.tv_model)
        self.setIndentation(0)
        self.setColumnWidth(0,500)
        self.setFocusPolicy(QtCore.Qt.NoFocus)
        self.setStyleSheet("QToolTip { color: rgb(170,170,170); background-color: rgb(20,20,20); border: 1px rgb(20,20,20); }")


############################################
if __name__ == "__main__":
    # workaround for a bug in maya
    try:
        tree_view_ui.close()
        tree_view_ui.deleteLater()
    except:
        pass

    tree_view_ui = Main_Window()
    tree_view_ui.show()

    try:
        tree_view_ui.show()
    except:
        tree_view_ui.close()
        tree_view_ui.deleteLater()

Answer 1

使用treeview的entered信号更容易。如果您使用带有json_decode($selectedString); // this will convert your json string into an object参数的showText重载，rect将自动执行其余操作。

这是一个简单的演示：

QToolTip