I'd like to implement a Windows Explorer extension that works like this:
The extension quietly records all folders the user visits in Windows Explorer.
A shortcut command like Ctrl+F3 activates the extension. The user can then type some parts of a folder name or path, and the extension shows the recently visited folders that most closely match the search query. The user can then select a folder, which lets Windows Explorer navigate there.
An important point: I don't want to just extend the standard Windows Explorer. I need to extend the Open File Dialog as well, i.e. these windows:
The Open File Dialog is something that runs inside other applications, so the task might be a bit more difficult. However, I'm pretty sure that it is possible. For example, Shell Namespace Extensions or Context Menu items are visible in both the standard Windows Explorer and the file dialogs in other applications. That's why I'm pretty sure there must be a way to implement such an extension.
What's the best way to implement it?
Edit: By the way, if someone knows of such an extension, I'd be very happy to know.
I'm writing NSE and I can't get the answers to the following questions:
Is there an easy way to show the standard "New" context submenu with all the same entires as for the normal file system folder? Or I have to add and process them manually?
How to show/use the system "New folder" button in the Explorer toolbar? Or again - I have to implement it myself?
I would like to use as much standard features as possible to have my NSE looks like the standard FS folder regardless of the Winsows version...
I would like to create menu item in windows explorer content menu (for all file types) which after click will open my application and pass the selected file name to it. Is there any tutorial for this ? I know there is ShellPlus component available but it's a bit outdated.
Registry
This method is easy since it comes down to adding some registry keys. The downside is that you can't put any logic in it. You can read about it here and here a simple example in Delphi. You get a bit more control if you are using DDE to execute the menu items. See here for a Delphi example.
Shell Extension
This method is a bit more work, but you can completely control the context menu from code. You would have to write a DLL, implement IContextMenu (or others) and register the dll with Windows Explorer. You can read about it here. You already mentioned Shell+.
Delphi includes a demo project for shell extensions. Look in the Demos\ActiveX\ShellExt folder.
This is possible independendly from the programming language by setting up shortcut menu handlers for the desired filetype(s) in the registry. There you can call your application with the correct path, the correct options and the right file-placeholders.
See the MSDN article on Creating Shortcut Menu Handlers for more detailled information.
I'd like to know if it ever makes sense to provide some functionality in a piece of software that is only available to the user through a context (right click) menu. It seems that in most software I've worked with the right click menu is always used as a quick way to get to features that are otherwise available from other buttons or menus.
Below is a screen shot of the UI I'm developing. The tree view on the right shows the user's library of catalogs. Users can create new catalogs, or add and remove existing catalogs to and from their library. Catalogs in their library can then be opened or closed, or set to read-only.
The screen shot shows the context menu I've created for the browser. Some commands can be executed independently from any specific catalog (New, Add). Yet the other commands must be applied to a specifically selected catalog (Close, Open, Remove, ReadOnly, Refresh, Clean UP, Rename).
Currently the "Catalog" menu at the top of the window looks identical to this context menu. Yet I think this may be confusing to the users as the tree view which shows the currently selected catalog may not always be visible. The user may have switched to the Search or Filters tab, or the left pane may be hidden entirely.
However, I'm hesitant to change the UI so that the commands that depends on a specifically selected catalog are only available through the context menu.
The Windows User Experience Interaction Guidelines for Windows 7 and Windows Vista states (pg233):
“Don’t make commands only available through context menus. Like shortcut keys, context menus are alternative means of performing commands and choosing options.”
The Apple Human Interface Guidelines states (pg189):
“Always ensure that contextual menu items are also available as [pulldown] menu commands. A contextual menu is hidden by default and a user might not know it exists, so it should never be the only way to access a command.”
In your case, opening and closing the catalogue appears already available through the +/- buttons in the tree itself, so you’re already consistent with the Windows guidelines, if not the Apple guidelines. IMO, the only reason to put them on the context menu at all is if they're the default (double-click) action (which they're not right now). Rename may also already be available by directly selecting the name of a selected catalog, but you may want a pulldown menu item for that any way since that may be no more discoverable than the context menu. The rest of the commands probably belong on a pulldown menu in addition to the context menu.
As far as the Catalog pulldown menu being redundant with the Catalog context menu, you may want to consider organizing your pulldown menus by type of action, rather than class of object, in order to provide an alternative organization. As you’ve realized, context menus already organize commands by class of object. In addition to providing an alternative organization that some of you users may find more intuitive, this may simplify your menubar. For example, rather than a Catalog and Family menus, you can have a single Edit menu with Add, Delete, Rename, Copy, etc. where these commands apply to whatever is selected, whether it be a catalog, folder, or family. If they don't apply to the current selection, they're disabled, but if it makes any sense in your app, make them apply.
BTW, what’s the difference between Add Catalog and New Catalog?
In general, it's a bad idea to have menu items accessible only through a contextual menu. Many users may not think to right click on an item to find out what actions can be performed on an item.
From your description, it sounds like it would make sense to have a 'Catalog' menu that disables menu options that are not currently relevant. For example, if no catalog is open, the 'Close' menu item would be greyed out. Similarly, the 'Open', 'Remove', 'Refresh', etc. items would be greyed out if no catalog is selected.
I suppose this depends on your user base, and who you're targetting your software at. Personally I wouldn't expect the user to be able to deduce what functionality is available when it is essentially "hidden" until they right-click on the correct item.
If it were me, I'd have a toolbar shown with the functionality exposed on there. By default the buttons would be disabled, and clicking on a node would enable the appropriate buttons based on the context. You could have this in addition to your current right-click options.
As a rule, I've always treated right-click menus as a redundant (i.e not necessary for operation of the software) shortcut to functionality for "power users".
I would leave the menu item out because the user doesn't have a way to see what catalog they are modifying if the treeview is hidden which can create problems if they think a different one is being shown.
Though, the accessible solution would be to trigger it with the keyboard also.
Yes. One key feature of UI is "discoverability": can the user find the function?
If you think that having a top-level menu doesn't make sense, based on the context, then you could have a menu button (scroll down) labelled (e.g.) "Actions" at the top of the pane.
I want to add an item into the Desktop context menu (the menu you see when you right-click on an empty space on the Windows Desktop).
Something like Catalyst Control Center in this screenshot:
I know how to add items to files' and folders' context menus through registry, but the Desktop seems to work differently: I didn't even find the text in the registry.
So, how can I add a new item into the Desktop menu and how can I associate some code with it?
I think the solution is language independent, if it's not, I'd appreciate any code that helps.
Such a handler must be registered in HKCR\Directory\Background, instead of usual locations like HKCR\Directory, HKCR\Folder, etc.
Check out Creating Shell Extension Handlers in MSDN.
There's a series of articles on CodeProject that details writing Shell Extensions and is very good:
http://www.codeproject.com/KB/shell/shellextguide1.aspx