mfc 托盘技术(taskbar status area)

最新推荐文章于 2020-04-09 21:28:11 发布

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最新推荐文章于 2020-04-09 21:28:11 发布

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分类专栏： vc 文章标签： mfc structure properties 任务 delete system

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本文介绍如何在MFC程序中实现任务栏图标，并确保程序关闭时图标自动清除。此外，还介绍了如何让程序在最小化时隐藏到任务栏。

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.让自己所编软件的图标显示在 taskbar status area(任务栏)处

创建一个基于对话框的MFC程序HelloWorld,在CHelloWorldDlg类中新建一个成员函数void InitNotifyIconData(void)。其具体实现如下

void CsupernotepadDlg::InitNotifyIconData(void)
{
/*NOTIFYCONDATA structure contains the information that the system
needs to process taskbar status area message*/
NOTIFYICONDATA nd;

//the size of this structure,in bytes
nd.cbSize = sizeof(NOTIFYICONDATA);

//a handle to the window that receives the notification message associated with an icon in the taskbar status area
nd.hWnd = m_hWnd;

//the application-defined identifier of the taskbar icon
nd.uID = IDR_MAINFRAME;

//Flags that indicate which of the other members contain valid data
nd.uFlags = NIF_ICON | NIF_TIP | NIF_MESSAGE;

// is the identifier.The system use it to send notification to the window identified in hWnd
nd.uCallbackMessage = WM_SHELLNOTIFY;

nd.hIcon = m_hIcon;

lstrcpy(nd.szTip,_T("HelloWorld"));
//send the message to the taskbar status area
Shell_NotifyIcon(NIM_ADD,&nd);
}

最后，需要在HelloWorldDlg.h中添加如下代码

#define WM_SHELLNOTIFY (WM_APP + 1)

2.关闭程序时自动清除图标

在类视图中，右击CHelloWorldDlg，选择“属性”(properties),点击“消息”(message),添加WM_ONDESTROY,在生成的OnDestroy函数中填写如下代码

void CHelloWorldDlg::OnDestroy()
{
CDialog::OnDestroy();

// TODO: Add your message handler code here
NOTIFYICONDATA nd;
nd.cbSize = sizeof(NOTIFYICONDATA);
nd.hWnd = m_hWnd;
nd.uID = IDR_MAINFRAME;

//DELETE THE ICON
Shell_NotifyIcon(NIM_DELETE,&nd);
}

3.实现点击最小化按钮时，程序最小化到任务栏

在CHelloWorldDlg类中加载onsize消息(方法同上)，

void CHelloWorld::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);

// TODO: Add your message handler code here
if( nType = SIZE_MINIMIZED )
{
//hide this window and passes the activition to another window
ShowWindow(SW_HIDE);
}
}