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WTL Tray Icon Template

, 4 Nov 2002 131.5K 5.8K 78
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A small template allowing you to easily add system tray icon support to your WTL application
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Introduction

This is a small template that you can use to add system tray icon support to your WTL based application. A big nod in the direction of Chris Maunder is due, as back in my MFC days I used his excellent CSystemTray class, which was the inspiration for this WTL version (though his adds much more functionality).

This template can be used to add "default" tray icon behaviour to your application. A menu is displayed when you right-click the icon, and double-clicking the icon will execute the default menu item. Note that the first menu item will be used as the default, though you can change this by calling SetDefaultItem.

Using CTrayIconImpl

To use the CTrayIconImpl template, do the following:

Firts, include the header file:

#include "trayiconimpl"

Next. derive your main window class (usually CMainFrame for SDI/MDI apps, or CMainDlg for dialog-based apps) from CTrayIconImpl:

class CMainDlg :
    ...
    CTrayIconImpl<CMainDlg>

Next (and this is important) add a CHAIN_MSG_MAP entry to your windows message map (to ensure that the WM_TRAYICON message is processed correctly):

BEGIN_MSG_MAP(CMainDlg)
    ...
    CHAIN_MSG_MAP(CTrayIconImpl<CMainDlg>)
END_MSG_MAP()

To install an icon in the system tray, call InstallIcon from OnCreate (SDI/MDI apps) or OnInitDialog (dialog apps). Note that you supply three parameters to this call - the tooltip text, the icon handle and the resource ID of the popup menu to display when the tray icon is right-clicked.

// Load a small icon
HICON hIconSmall = (HICON)::LoadImage(_Module.GetResourceInstance(), 
                                      MAKEINTRESOURCE(IDR_MAINFRAME),
                                      IMAGE_ICON, 
                                      ::GetSystemMetrics(SM_CXSMICON), 
                                      ::GetSystemMetrics(SM_CYSMICON), 
                                      LR_DEFAULTCOLOR);
...
// Install tray icon
InstallIcon(_T("Tooltip text"), hIconSmall, IDR_POPUP);

Finally, add the necessary COMMAND_ID_HANDLERs for your popup menu commands. That's it!

Notes

Change the default menu item by calling SetDefaultItem:

// Double-clicking the tray icon will display the "About" box
SetDefaultItem(ID_APP_ABOUT);

Change the tooltip text by calling SetTooltipText.

SetTooltipText(_T("Yeeha!"));

Override the void PrepareMenu(HMENU hMenu) function in order to initialize the popup menu before it is displayed. For example, you may want to disable items, check items, etc. (see the WTLTrayIconWindow example for a demonstration).

void PrepareMenu(HMENU hMenu)
{
    CMenuHandle menu(hMenu);
    menu.EnableMenuItem(ID_TEST_DISABLED, MF_GRAYED);
    menu.CheckMenuItem(ID_TEST_CHECKED, MF_CHECKED);
}

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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Comments and Discussions

 
GeneralAnother WTL code snippet to easily minimize into a tray icon Pin
ryltsov20-Jan-09 23:58
memberryltsov20-Jan-09 23:58 
GeneralRe: Another WTL code snippet to easily minimize into a tray icon Pin
Peter Mares25-Sep-10 0:06
memberPeter Mares25-Sep-10 0:06 
QuestionCan you change the icon Pin
Angus Comber17-Feb-07 6:08
memberAngus Comber17-Feb-07 6:08 
AnswerRe: Can you change the icon Pin
MaxZ23-Apr-07 5:42
memberMaxZ23-Apr-07 5:42 
Questionexit can't remove tray icon Pin
Alan Black8-Feb-07 20:05
memberAlan Black8-Feb-07 20:05 
QuestionNeeds a better right button down handler? Pin
Brandon Jen17-Oct-06 12:48
memberBrandon Jen17-Oct-06 12:48 
If you right-click down on the icon and release the right button somewhere else (say... over the taskbar) both menus appear (one for the icon and the other for the taskbar). Any ideas on how to solve this problem?
AnswerRe: Needs a better right button down handler? Pin
Rob Caldecott17-Oct-06 13:28
memberRob Caldecott17-Oct-06 13:28 
GeneralReally nice! Pin
Jörgen Sigvardsson24-Aug-06 13:42
memberJörgen Sigvardsson24-Aug-06 13:42 
GeneralRe: Really nice! Pin
Robert Edward Caldecott24-Aug-06 23:16
memberRobert Edward Caldecott24-Aug-06 23:16 
GeneralWTL versus MFC Pin
BruteBertus19-Feb-06 0:31
memberBruteBertus19-Feb-06 0:31 
QuestionHow do I get rid of the Taskbar button? Pin
Peeyush_kota1-Apr-05 18:10
memberPeeyush_kota1-Apr-05 18:10 
AnswerRe: How do I get rid of the Taskbar button? Pin
no_way18-Mar-07 10:11
memberno_way18-Mar-07 10:11 
Generalerror Pin
lxwq33719-Dec-04 15:41
memberlxwq33719-Dec-04 15:41 
GeneralRe: error Pin
Robert Edward Caldecott19-Dec-04 21:35
memberRobert Edward Caldecott19-Dec-04 21:35 
GeneralRe: error Pin
WiNrOOt[FCG]5-Nov-06 15:59
memberWiNrOOt[FCG]5-Nov-06 15:59 
GeneralRe: error Pin
Yogesh P. Dhakad27-Apr-07 9:32
memberYogesh P. Dhakad27-Apr-07 9:32 
GeneralSome corner cases Pin
troff23-Sep-04 3:59
membertroff23-Sep-04 3:59 
GeneralRe: Some corner cases Pin
Robert Edward Caldecott23-Sep-04 4:18
memberRobert Edward Caldecott23-Sep-04 4:18 
GeneralRe: Some corner cases Pin
troff28-Sep-04 4:56
membertroff28-Sep-04 4:56 
QuestionHow did you make the XP button style? Pin
DrGary27-Nov-02 10:38
sussDrGary27-Nov-02 10:38 
AnswerRe: How did you make the XP button style? Pin
Robert Edward Caldecott27-Nov-02 12:04
memberRobert Edward Caldecott27-Nov-02 12:04 
GeneralOops. Multiple About boxes Pin
DrGary23-Nov-02 14:53
sussDrGary23-Nov-02 14:53 
GeneralRe: Oops. Multiple About boxes Pin
Robert Edward Caldecott27-Nov-02 12:06
memberRobert Edward Caldecott27-Nov-02 12:06 
Generalwell done! Pin
johnthan10-Nov-02 18:11
memberjohnthan10-Nov-02 18:11 
GeneralRe: well done! Pin
Duncan Colvin24-Feb-06 7:56
memberDuncan Colvin24-Feb-06 7:56 
GeneralNicely Executed Pin
Ed Gadziemski6-Nov-02 2:45
memberEd Gadziemski6-Nov-02 2:45 
GeneralRe: Nicely Executed Pin
Robert Edward Caldecott6-Nov-02 2:54
memberRobert Edward Caldecott6-Nov-02 2:54 
GeneralRe: Nicely Executed Pin
Barry Lapthorn13-Nov-02 6:22
memberBarry Lapthorn13-Nov-02 6:22 
GeneralRe: Nicely Executed Pin
Robert Edward Caldecott13-Nov-02 6:32
memberRobert Edward Caldecott13-Nov-02 6:32 

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