如何使用QToolButton正确管理文本和图标？

Question

我的代码片段如下所示：

nextPageBtn = new QToolButton();
nextPageBtn->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
nextPageBtn->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
nextPageBtn->setIcon(QIcon(":/next.png"));
nextPageBtn->setText("Next");

目前我有两个问题。

第一：
我希望文本位于图标的左侧，但是使用我提供的代码，文本在右边，如下所示：

第二
当窗口放大时，我无法找到将文本和图标保持在按钮中心的方法。当按钮变大时，它看起来像这样：

修改：
这就是我管理布局的方式：

nextPageHLayout = new QHBoxLayout; //This is the layout for QToolButton, it has two spacers and a QToolButton
mainVLayout->addLayout(nextPageHLayout); //mainVLayout is the main layout, and I put the mainVLayout to the central widget, and it also contains a QLabel above the nextPageHLayout

QSpacerItem *leftBtnSpacer = new QSpacerItem(1, 1, QSizePolicy::Expanding, QSizePolicy::Fixed);
nextPageHLayout->addSpacerItem(leftBtnSpacer);

nextPageBtn = new QToolButton(mainWidget);
nextPageHLayout->addWidget(nextPageBtn);
nextPageBtn->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
nextPageBtn->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
nextPageBtn->setIcon(QIcon(":/next.png"));
nextPageBtn->setText("Next");

QSpacerItem *rightBtnSpacer = new QSpacerItem(1, 1, QSizePolicy::Expanding, QSizePolicy::Fixed);
nextPageHLayout->addSpacerItem(rightBtnSpacer);

Answer 1

您必须进行以下更改：

• 您不应更改QToolButton的尺寸政策，这就是它扩展的原因。

• 您必须将layoutDirection更改为Qt::RightToLeft。

QHBoxLayout * nextPageHLayout = new QHBoxLayout; //This is the layout for QToolButton, it has two spacers and a QToolButton
mainVLayout->addLayout(nextPageHLayout); //mainVLayout is the main layout, and it also contains a QLabel above the nextPageHLayout

QSpacerItem *leftBtnSpacer = new QSpacerItem(1, 1, QSizePolicy::Expanding, QSizePolicy::Minimum);
nextPageHLayout->addSpacerItem(leftBtnSpacer);

nextPageBtn = new QToolButton(mainWidget);
nextPageHLayout->addWidget(nextPageBtn);
nextPageBtn->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
nextPageBtn->setIcon(QIcon(":/next.png"));
nextPageBtn->setText("Next");
nextPageBtn->setLayoutDirection(Qt::RightToLeft);

QSpacerItem *rightBtnSpacer = new QSpacerItem(1, 1, QSizePolicy::Expanding, QSizePolicy::Minimum);
nextPageHLayout->addSpacerItem(rightBtnSpacer);