c++ - 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。

首先:
我希望文本位于图标的左侧，但使用我提供的代码，文本位于右侧，如下所示:

第二个:
当窗口放大时，我想不出一种方法来将文本和图标保持在按钮的中央。当按钮变大时看起来像这样:

编辑:
这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:

• 您不应该更改 QToolButton 的大小策略，这就是它展开的原因。

• 您必须更改 layoutDirection到 Qt::RightToLeft。

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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);