c++ 如何以编程方式显示功能区按钮的下拉菜单？

8e2ybdfx 于 2023-08-09 发布在其他

关注(0)|答案(2)|浏览(173)

我有一个子项目添加了一套功能区按钮。当用户点击按钮下面的小箭头时，这些项目就会显示出来。我想显示这样的下拉菜单时，按钮本身被点击。我怎么能这么做呢？
我最初的想法是在用户单击按钮时以编程方式显示菜单。我已经能够在工具栏（here）上做同样的事情，但在Ribbon上使用类似的解决方案会创建无限递归：

// ...
ON_COMMAND(ID_RIBBON_BUTTON, &MainFrame::OnButtonClicked)
// ...

CMFCRibbonPanel *panel = /* initialization */
CMFCRibbonButton *button = new CMFCRibbonButton(ID_RIBBON_BUTTON, "Caption");
panel->Add(button);

CMFCRibbonButton *item1 = new CMFCRibbonButton(ID_RIBBON_BUTTON, "Item 1");
button->AddSubItem(item1);
CMFCRibbonButton *item2 = new CMFCRibbonButton(ID_RIBBON_BUTTON, "Item 2");
button->AddSubItem(item2);

// ...
void MainFrame::OnButtonClicked()
{
  if (auto button = static_cast<CMFCRibbonButton *>(m_ribbons.wndRibbonBar.FindByID(ID_RIBBON_BUTTON))) {

    // button->OnClick({}); // <- causes infinite recursion

    // What to do here?
  }
}

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c++

来源：https://stackoverflow.com/questions/59580442/how-to-programmatically-show-dropdown-menu-of-ribbon-button

2条答案

按热度按时间

dauxcl2d1#

到目前为止，我发现的最简单的方法是使用受保护的方法CMFCRibbonButton::OnShowPopupMenu。这意味着派生CMFCRibbonButton类并更改方法的可见性：

#include <afxribbonbutton.h>

class CMyMFCRibbonButton : public CMFCRibbonButton {
public:
  using CMFCRibbonButton::CMFCRibbonButton;

  virtual void OnShowPopupMenu() override {
    CMFCRibbonButton::OnShowPopupMenu();
  }
};

// ...
ON_COMMAND(ID_RIBBON_BUTTON, &MainFrame::OnButtonClicked)
// ...

CMFCRibbonPanel *panel = /* initialization */
CMyMFCRibbonButton *button = new CMyMFCRibbonButton(ID_RIBBON_BUTTON, "Caption");
panel->Add(button);

CMFCRibbonButton *item1 = new CMFCRibbonButton(ID_RIBBON_BUTTON, "Item 1");
button->AddSubItem(item1);
CMFCRibbonButton *item2 = new CMFCRibbonButton(ID_RIBBON_BUTTON, "Item 2");
button->AddSubItem(item2);

// ...
void MainFrame::OnButtonClicked()
{
  if (auto button = static_cast<CMyMFCRibbonButton*>(m_ribbons.wndRibbonBar.FindByID(ID_RIBBON_BUTTON))) {
    button->OnShowPopupMenu();
  }
}

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赞(0）回复(0）举报 2023-08-09

k2fxgqgv2#

如果创建一个空白弹出子菜单并附加到按钮，则按钮将按您的请求工作，同时显示以前作为子项添加的按钮。

CMenu map_menu;
map_menu.CreateMenu();

button->SetHMenu(map_menu.GetSafeHmenu());

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赞(0）回复(0）举报 2023-08-09

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c++ 如何以编程方式显示功能区按钮的下拉菜单？

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