我可以区分系统托盘图标上的单次点击和双次点击吗？ [英] Can I differentiate between single and double clicks on the system tray icon?

问题描述

我使用 Shell_NotifyIcon 创建我的系统托盘图标，然后捕获其 WM_LBUTTONDBLCLK 通知，当用户双击图标（我使用它显示一个对话窗口）。我还捕获 WM_RBUTTONDOWN 通知以显示上下文菜单。

I create my system tray icon using Shell_NotifyIcon and then trap its WM_LBUTTONDBLCLK notifications for when a user double-clicks the icon (I use it show a dialog window.) I also trap WM_RBUTTONDOWN notifications to show the context menu.

现在我想，一个左键单击后显示一个上下文菜单是很好。

Now I'm thinking that it would be nice to show a context menu after a single left click. But how do I do that?

如果我捕获 WM_LBUTTONDOWN 并显示我的上下文菜单，它可以正常工作。但是，当有人双击图标时，它首先显示我的上下文菜单，然后显示对话框窗口。

If I trap WM_LBUTTONDOWN and show my context menu it works fine. But then when someone double-clicks the icon, it first shows my context menu and then displays the dialog window. So I'm not sure how to overcome this?

编辑：这是我的代码：

NOTIFYICONDATA nid;
memset(&nid, 0, sizeof(nid));
nid.cbSize = sizeof(nid);
nid.hWnd = this->GetSafeHwnd();
nid.uID = TRAY_ICON_ID1;
nid.uFlags = NIF_ICON;
nid.uCallbackMessage = TRAY_NOTIFICATION_ID1;
nid.hIcon = ghIcon;

Shell_NotifyIcon(NIM_ADD, &nid);

，然后：

ON_MESSAGE(TRAY_NOTIFICATION_ID1, OnTrayIconNotifications)

LRESULT OnTrayIconNotifications(WPARAM wParam, LPARAM lParam)
{
    UINT uID = (UINT)wParam;
    UINT uMouseMsg = (UINT)lParam;

    if(uID == TRAY_ICON_ID1)
    {
        switch(uMouseMsg)
        {
        case WM_RBUTTONDOWN:
            {
                //Show context menu
                //...
                int nChosenCmd = TrackPopupMenu(hMenu, 
                    TPM_RIGHTALIGN | TPM_TOPALIGN |
                    TPM_LEFTBUTTON | TPM_VERPOSANIMATION | 
                    TPM_HORNEGANIMATION | TPM_RETURNCMD,
                    x, y, 0, 
                    this->GetSafeHwnd(), NULL);
            }
            break;

        case WM_LBUTTONDBLCLK:
            {
                //Show dialog window
                CDialogBasedClass dlg(this);
                dlg.DoModal();
            }
            break;
        }
    }

    return 0;
}

推荐答案

我怀疑你必须

在您的 WM_LBUTTONDOWN 点击处理程序中，设置计时器，该计时器将在系统的双击时间已过。在 WM_LBUTTONDBLCLICK 处理程序中检查该计时器是否处于活动状态，如果是，请取消。

In your WM_LBUTTONDOWN click handler, set a timer that expires after the system's double click time has elapsed. In your WM_LBUTTONDBLCLICK handler check if that timer is active and if it is, cancel it.

这意味着用户点击了您的图标，但没有前进并双击它;这意味着它是时候显示上下文菜单。

If the timer expires that means the user clicked your icon but did not go ahead and double-click it; that means it's time to show the context menu.

这篇关于我可以区分系统托盘图标上的单次点击和双次点击吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！