gecko-dev/lib/mac/UserInterface/CButtonEnabler.cp

160 строки
4.3 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
// Written by John R. McMullen
#include "CButtonEnabler.h"
#include "LSharable.h"
#include "MButtonEnablerPolicy.h"
//======================================
#pragma mark --------- class CButtonMaster
//======================================
//======================================
class CButtonMaster
//======================================
: public LAttachable // CButtonEnablers all attach to this
, public LSharable // shared by all CButtonEnablers.
{
public:
CButtonMaster();
virtual ~CButtonMaster();
static CButtonMaster* sButtonMaster;
}; // class CButtonMaster
CButtonMaster* CButtonMaster::sButtonMaster = nil;
//-----------------------------------
CButtonMaster::CButtonMaster()
//-----------------------------------
{
sButtonMaster = this;
} // CButtonMaster::CButtonMaster()
//-----------------------------------
CButtonMaster::~CButtonMaster()
//-----------------------------------
{
sButtonMaster = nil;
} // CButtonMaster::~CButtonMaster()
//======================================
#pragma mark --------- class CButtonEnabler
//======================================
//-----------------------------------
CButtonEnabler* CButtonEnabler::CreateButtonEnablerStream(LStream* inStream)
//-----------------------------------
{
return new CButtonEnabler(inStream);
}
//-----------------------------------
CButtonEnabler::CButtonEnabler(LStream* inStream)
//-----------------------------------
: LAttachment(inStream)
, mControl(nil)
{
SetMessage(msg_Event); // execute me only for event messages.
LAttachable *host = LAttachable::GetDefaultAttachable();
mControl = dynamic_cast<LControl*>(host);
Assert_(mControl);
Try_
{
if (!CButtonMaster::sButtonMaster)
new CButtonMaster;
CButtonMaster::sButtonMaster->AddUser(this);
CButtonMaster::sButtonMaster->AddAttachment(this, nil, false);
// don't care where, master is not owner.
}
Catch_ (inErr)
{
}
EndCatch_
LAttachable::SetDefaultAttachable(host);
// Restore, because LAttachable's constructor (called when we made
// the new button master) clobbers the default attachable
} // CButtonEnabler::CButtonEnabler
//-----------------------------------
CButtonEnabler::~CButtonEnabler()
//-----------------------------------
{
if (CButtonMaster::sButtonMaster)
{
CButtonMaster::sButtonMaster->RemoveAttachment(this);
CButtonMaster::sButtonMaster->RemoveUser(this);
}
} // CButtonEnabler::~CButtonEnabler
//-----------------------------------
void CButtonEnabler::UpdateButtons()
//-----------------------------------
{
if (CButtonMaster::sButtonMaster)
CButtonMaster::sButtonMaster->ExecuteAttachments(msg_Event, nil);
} // CButtonEnabler::UpdateButtons
//-----------------------------------
void CButtonEnabler::ExecuteSelf(MessageT inMessage, void*)
//-----------------------------------
{
MButtonEnablerPolicy* thePolicy = dynamic_cast<MButtonEnablerPolicy*>(mControl);
if (thePolicy)
{
// Delegate the policy
thePolicy->HandleButtonEnabling();
}
else
{
// Default enabling policy for LControl
LCommander* theTarget = LCommander::GetTarget();
MessageT command = mControl->GetValueMessage();
Boolean enabled = false;
Boolean usesMark = false;
Str255 outName;
Char16 outMark;
if (!mControl->IsActive() || !mControl->IsVisible())
return;
if (!theTarget)
return;
theTarget->ProcessCommandStatus(command, enabled, usesMark, outMark, outName);
if (enabled)
{
mControl->Enable();
}
else
{
mControl->Disable();
}
}
} // CButtonEnabler::ExecuteSelf