設置包含TableWidget的對話窗口的最佳尺寸

Question

我寫了一個只包含TableWigdet的小對話框。我怎樣才能確定表的水平尺寸？我想調整對話框窗口的大小，以便在沒有水平滾動條的情況下顯示錶格。

Answer 1

據我所知，有沒有簡單的方法來做到這一點。您必須總結表格列的寬度，然後爲標題添加空間。您還必須爲垂直滾動條和小部件框架添加空間。這裏是一個辦法做到這一點，

class myTableWidget(QtGui.QTableWidget): 

    def sizeHint(self): 
     width = 0 
     for i in range(self.columnCount()): 
      width += self.columnWidth(i) 

     width += self.verticalHeader().sizeHint().width() 

     width += self.verticalScrollBar().sizeHint().width() 
     width += self.frameWidth()*2 

     return QtCore.QSize(width,self.height()) 

Answer 2

你可以使用類似的東西（註釋足夠我希望）：

from PyQt4.QtCore import * 
from PyQt4.QtGui import * 

class MyTableWidget(QTableWidget): 
    def __init__(self, x, y, parent = None): 
     super(MyTableWidget, self).__init__(x, y, parent) 

     self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff) 
     self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn) 

     # To force the width to use sizeHint().width() 
     self.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Preferred) 

     # To readjust the size automatically... 
     # ... when columns are added or resized 
     self.horizontalHeader().geometriesChanged \ 
      .connect(self.updateGeometryAsync) 
     self.horizontalHeader().sectionResized \ 
      .connect(self.updateGeometryAsync)   
     # ... when a row header label changes and makes the 
     # width of the vertical header change too 
     self.model().headerDataChanged.connect(self.updateGeometryAsync) 

    def updateGeometryAsync(self):  
     QTimer.singleShot(0, self.updateGeometry) 

    def sizeHint(self): 
     height = QTableWidget.sizeHint(self).height() 

     # length() includes the width of all its sections 
     width = self.horizontalHeader().length() 

     # you add the actual size of the vertical header and scrollbar 
     # (not the sizeHint which would only be the preferred size)     
     width += self.verticalHeader().width()   
     width += self.verticalScrollBar().width()  

     # and the margins which include the frameWidth and the extra 
     # margins that would be set via a stylesheet or something else 
     margins = self.contentsMargins() 
     width += margins.left() + margins.right() 

     return QSize(width, height) 

當行標題的變化，整個垂直頭部的變化寬度，但在發出信號headerDataChanged後不立刻。
這就是爲什麼我使用QTimer來調用updateGeometry（必須在sizeHint更改時調用）（QTableWidget實際更新了垂直標頭寬度後）。