Qt學習之QSplitter

在一個Qt例子中看到下列語句

    QSplitter *splitter = new QSplitter(ui->managePage);

    splitter->resize(700,360);

    splitter->move(0,50);

    splitter->addWidget(ui->toolBox);

    splitter->addWidget(ui->dailyList);

    splitter->setStretchFactor(0,1);

    splitter->setStretchFactor(1,1);

QSplitter爲分割窗口類。

SetStretchFactor()方法用於設定可伸縮控件，它的第一個參數指的是控件的序號，控件序號按插入的先後次序從0開始進行編號；第二個參數爲大於0的值表示此控件爲可伸縮。

在這裏，就是說，toolBox和dailyList控件都是可拉伸的。

具體可以看Qt裏面的幫助文檔：

void QSplitter::setStretchFactor(int index, int stretch)
Updates the size policy of the widget at position index to have a stretch factor of stretch.

stretch is not the effective stretch factor; the effective stretch factor is calculated by taking the initial size of the widget and multiplying it with stretch.

This function is provided for convenience. It is equivalent to
  QWidget *widget = splitter->widget(index);
  QSizePolicy policy = widget->sizePolicy();
  policy.setHorizontalStretch(stretch);
  policy.setVerticalStretch(stretch);
  widget->setSizePolicy(policy);