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vault backup: 2025-02-10 17:27:57

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Awin Huang
2025-02-10 17:27:57 +08:00
parent 60a1c02c6a
commit 5752038f86
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21.01. Programming/QT/Dropdown button.md Normal file
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![[Pasted image 20220519094358.png]]
1. Button必須是QToolButton.
2. 建立menu.
3. 建立action.
4. 把action加到menu裡面
5. 把menu設定給button
6. code example:
```cpp
QMenu* saveFrameMenu = new QMenu;
saveRawAction = new QAction(QIcon(QPixmap(":/image/resources/button-raw.png")), "SaveRaw", this);
saveJpgAction = new QAction(QIcon(QPixmap(":/image/resources/button-jpg.png")), "SaveJpg", this);
saveBmpAction = new QAction(QIcon(QPixmap(":/image/resources/button-bmp.png")), "SaveBmp", this);
saveFrameMenu->addAction(saveRawAction);
saveFrameMenu->addAction(saveJpgAction);
saveFrameMenu->addAction(saveBmpAction);
ui.toolButtonSaveFrame->setMenu(saveFrameMenu);
ui.toolButtonSaveFrame->setDefaultAction(saveJpgAction);
ui.toolButtonSaveFrame->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
ui.toolButtonSaveFrame->setPopupMode(QToolButton::MenuButtonPopup);
```