//
/// When the gadget window receives a WM_COMMAND_ENABLE message, it is likely from a
/// gadget or control within a TControlGadget. This reroutes it to the command
/// target.
//
void
TGadgetWindow::EvCommandEnable(TCommandEnabler& ce)
{
// If someone derived from TGadgetWindow and handles the command there,
// give these handlers the first crack.
//
TEventInfo eventInfo(WM_COMMAND_ENABLE, ce.GetId());
if (Find(eventInfo)) {
Dispatch(eventInfo, 0, TParam2(&ce));
return;
}
TWindow* target = GetParentO();
// Forward to command target if the enabler was really destined for us, and
// not a routing from the frame.
//
if (target && ce.IsReceiver(*this)) {
CHECK(target->IsWindow());
ce.SetReceiver(*target);
target->EvCommandEnable(ce);
if( ce.GetHandled() )
return;
}
// Default to TWindow's implementation if the above routing fails
//
TWindow::EvCommandEnable(ce);
}
//
/// When the gadget window receives a WM_COMMAND message, it is likely from a gadget
/// or control within a TControlGadget. This reroutes it to the command target.
//
TResult
TGadgetWindow::EvCommand(uint id, HWND hWndCtl, uint notifyCode)
{
TRACEX(OwlCmd, 1, "TGadgetWindow::EvCommand - id(" << id << "), ctl(" <<\
hex << uint(hWndCtl) << "), code(" << notifyCode << ")");
// First allow any derived class that wants to handle the command
// NOTE: This search only caters for menu-style WM_COMMANDs (not those
// sent by controls)
//
TEventInfo eventInfo(0, id);
if (Find(eventInfo)) {
Dispatch(eventInfo, id);
return 0;
}
#if 0
// Prior versions of TGadgetWindow relied on TWindow's EvCommand for
// dispatching WM_COMMAND events. This required that one derives from
// a decoration class (eg. TControlbar, TToolbox) to handle control
// notifications. The current version uses a more generalized logic
// involving the CommandTarget and a frame ancestor class. This allows
// a client window to handle notifications of a control in a toolbar
// without using a TControlbar-derived class.
// However, if you need to previous behaviour, simply invoke TWindow's
// EvCommand from this handler.
return TWindow::EvCommand(id, hWndCtl, notifyCode);
#endif
TWindow* target;
TFrameWindow* frame;
// Find the frame who is our latest ancestor and make it our command target
//
for (target = GetParentO(); target; target = target->GetParentO()) {
frame = TYPESAFE_DOWNCAST(target, TFrameWindow);
if (frame || !target->GetParentO())
break;
}
// Make sure the frame doesn't think we are its command target, or a BAD
// loop will happen
//
if (target && (!frame || frame->GetCommandTarget() != GetHandle())) {
CHECK(target->IsWindow());
return target->EvCommand(id, hWndCtl, notifyCode);
}
// If all command routing fails, go back to basic dispatching of TWindow
//
return TWindow::EvCommand(id, hWndCtl, notifyCode);
}