DtWsmAddWorkspaceModifiedCallback(3)

NAME

DtWsmAddWorkspaceModifiedCallback − add a callback to be called when any workspace is changed

SYNOPSIS

#include <Dt/Wsm.h>
DtWsmCBContext
DtWsmAddWorkspaceModifiedCallback(Widget widget,
DtWsmWsModifiedProc ws_change,
Pointer client_data);

DESCRIPTION

The DtWsmAddWorkspaceModifiedCallback() function works with the CDE workspace manager, dtwm(1), and registers a function to be called when a workspace is added, deleted or modified.

The widget argument is a realized widget.

The ws_change argument is the procedure to be called when a workspace is modified.

The client_data argument points to arbitrary client data to be passed back to ws_change.

The header defines the DtWsmWsModifiedProc callback prototype as follows:

typedef void (∗DtWsmWsModifiedProc)(Widget widget,
Atom aWorkspace,
DtWsmWsReason reason,
Pointer client_data);

The widget argument is the ID of the widget to be registered with the callback.

The aWorkspace argument is the name of the new current workspace (converted to an X atom).

The reason argument is a type of modification:

DtWSM_REASON_ADD
A new workspace was added.

DtWSM_REASON_BACKDROP
The backdrop for the workspace changed.

DtWSM_REASON_CURRENT
A different workspace was made the current workspace.

DtWSM_REASON_DELETE
A workspace was deleted.

DtWSM_REASON_TITLE
The workspace title changed.

The client_data argument points to the client data to be registered with the callback.

RETURN VALUE

Upon successful completion, the DtWsmAddWorkspaceModifiedCallback() function returns a workspace callback registration context.

APPLICATION USAGE

The DtWsmAddWorkspaceModifiedCallback() function returns a registration context that the application must save in order to remove this callback later.

DtWsmAddWorkspaceModifiedCallback() requires a window; thus, a gadget is not acceptable for the widget argument.

The DtWsmRemoveWorkspaceCallback(3) function needs a registration context to remove the callback.

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