UI Negotiation (Menu, Toolbar, and Status Bar) - Win32 Programmer's Reference

Custom Search

UI Negotiation (Menu, Toolbar, and Status Bar)

The mechanism to determine which items will appear in the view window while the contents are visible is similar to OLE in-place activation but notable differences do exist. Three of them are discussed here.

First, the view window always exists even though it does not have the input focus. Therefore, it should maintain three states:

Deactivated
Activated with the focus
Activated without the focus

The view window may present different sets of menu items depending on the focus state. The Explorer notifies the state changes by calling IShellView::UIActivate. The view object should call IShellBrowser::OnViewWindowActivate when the view window is activated by the user.

Second, the Explorer does not support layout negotiation. Instead, it allows the view window to add toolbar buttons or set status bar texts. The view window may create modeless popups. The view object may call IShellBrowser::GetControlWindow or IShellBrowser::SendControlMsg to control them. The Explorer forwards appropriate notification messages from those controls using IShellView::ForwardControlMsg.

Third, the Explorer allows the view window to add menu items to the Explorer's pull-down menus (in addition to inserting top-level pull-down menus). In other words, the view object is allowed to insert menu items to submenus returned from IShellBrowser::InsertMenus. To let the Explorer dispatch menu messages correctly, a certain range of menu item IDs (between SHVIEW_FIRST and SHVIEW_LAST) must be used.

Last news from Greatis Software

    Nostalgia .Net     .Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More »

Recommended software for developers

    Ultimate Pack     Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More »

    Form Designer .Net     Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More »

    Print Suite .Net     Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More »

    Gradient Controls .Net     Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More »

    Greatis iGrid     iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More »

All the contacts and projects

Dmitry Vasiliev (just.dmitry)

More Online Helps

Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages

greatis just4fun network