#include "cBroadcastingTableSelectors.h"

// ===========================================================================
//	cBroadcastingTableSelectors.cpp	   Version 1.0	©1998 Joakim Braun All rights reserved.
// ===========================================================================
//
//	Two subclasses of LBroadcaster and, respectively, LTableSingleSelector and LTableMultiSelector.
//	Classes broadcasts a message every time table selection is about to change,
//	and another message every time selection has changed. Messages are customizable.

//	Useful if you have an LTableView and clicking in it causes entry data to be
//	made available for the user to edit. When you receive mAboutToChangeMsg,
//	you know it's time to retrieve the data shown and prepare to show another entry's data.

//	cBroadcastingTableSelectors is free for any and all use. 
//	Do not distribute modified source code under my name.

//	No support promised, no liability accepted. Provided "as is". 
//	That said, I can be reached at braun@swipnet.se.

//	Change history:
//	1.0	June 4, 1998	First release


// ===========================================================================
//	Ä Constructor
// ===========================================================================
//	Takes an LTableView as parameter.

cBroadcastingSingleSelector::cBroadcastingSingleSelector(LTableView	 *inTableView) : LTableSingleSelector(inTableView){

	mAboutToChangeMsg 	= msg_Nothing,
	mChangedMsg		= msg_Nothing;
}

// ===========================================================================
//	Ä Constructor
// ===========================================================================
//	Takes an LTableView and two MessageT:s as parameters.

cBroadcastingSingleSelector::cBroadcastingSingleSelector(LTableView	 *inTableView, MessageT inAboutToChangeMessage, MessageT inChangedMsg) : LTableSingleSelector(inTableView){

	SetMessages(inAboutToChangeMessage, inChangedMsg);
}
	
// ===========================================================================
//	Ä SelectCell
// ===========================================================================
//	Overridden from LTableSelector. Broadcast messages before and after selection changes.

void cBroadcastingSingleSelector::SelectCell( const STableCell &inCell){
	
	if(inCell != mSelectedCell){
		
		if(mIsBroadcasting)
			BroadcastMessage(mAboutToChangeMsg);
		
		LTableSingleSelector::SelectCell(inCell);
		
		if(mIsBroadcasting)
			BroadcastMessage(mChangedMsg);
	}
}

// ===========================================================================
//	Ä UnselectCell
// ===========================================================================
//	Overridden from LTableSelector. Broadcast messages before and after selection changes.

void cBroadcastingSingleSelector::UnselectCell( const STableCell &inCell){
	
	if(inCell == mSelectedCell){
		
		if(mIsBroadcasting)
			BroadcastMessage(mAboutToChangeMsg);
		
		LTableSingleSelector::UnselectCell(inCell);
		
		if(mIsBroadcasting)
			BroadcastMessage(mChangedMsg);
	}
}

// ===========================================================================
//	Ä SetMessages
// ===========================================================================
//	Set messages to broadcast before and after selection changes.

void cBroadcastingSingleSelector::SetMessages(MessageT inAboutToChangeMessage, MessageT inChangedMsg){
	
	mAboutToChangeMsg = inAboutToChangeMessage,
	mChangedMsg = inChangedMsg;
}

// ===========================================================================
//	Ä GetMessages
// ===========================================================================
//	Get messages to broadcast before and after selection changes.

void cBroadcastingSingleSelector::GetMessages(MessageT& outAboutToChangeMessage, MessageT& outChangedMsg){
	
	outAboutToChangeMessage = mAboutToChangeMsg,
	outChangedMsg = mChangedMsg;
}

#pragma mark -

// ===========================================================================
//	Ä Constructor
// ===========================================================================
//	Takes an LTableView as parameter.

cBroadcastingMultiSelector::cBroadcastingMultiSelector(LTableView	 *inTableView) : LTableMultiSelector(inTableView){

	mAboutToChangeMsg 	= msg_Nothing,
	mChangedMsg		= msg_Nothing;
}

// ===========================================================================
//	Ä Constructor
// ===========================================================================
//	Takes an LTableView and two MessageT:s as parameters.

cBroadcastingMultiSelector::cBroadcastingMultiSelector(LTableView	 *inTableView, MessageT inAboutToChangeMessage, MessageT inChangedMsg) : LTableMultiSelector(inTableView){

	SetMessages(inAboutToChangeMessage, inChangedMsg);
}
	
// ===========================================================================
//	Ä SelectCell
// ===========================================================================
//	Overridden from LTableSelector. Broadcast messages before and after selection changes.
//	Note that in an LTableMultiSelector, SelectCell() may be called many times
//	for a single click, so this may not be an appropriate way of handling that case.

void cBroadcastingMultiSelector::SelectCell( const STableCell &inCell){
	
	if (!CellIsSelected(inCell)) {
		
		if(mIsBroadcasting)
			BroadcastMessage(mAboutToChangeMsg);
		
		LTableMultiSelector::SelectCell(inCell);
		
		if(mIsBroadcasting)
			BroadcastMessage(mChangedMsg);
	}
}

// ===========================================================================
//	Ä UnselectCell
// ===========================================================================
//	Overridden from LTableSelector. Broadcast messages before and after selection changes.
//	Note that in an LTableMultiSelector, UnselectCell() may be called many times
//	for a single click, so this may not be an appropriate way of handling that case.

void cBroadcastingMultiSelector::UnselectCell( const STableCell &inCell){
	
	if(CellIsSelected(inCell)){
		
		if(mIsBroadcasting)
			BroadcastMessage(mAboutToChangeMsg);
		
		LTableMultiSelector::UnselectCell(inCell);
		
		if(mIsBroadcasting)
			BroadcastMessage(mChangedMsg);
	}
}

// ===========================================================================
//	Ä SetMessages
// ===========================================================================
//	Set messages to broadcast before and after selection changes.

void cBroadcastingMultiSelector::SetMessages(MessageT inAboutToChangeMessage, MessageT inChangedMsg){
	
	mAboutToChangeMsg = inAboutToChangeMessage,
	mChangedMsg = inChangedMsg;
}

// ===========================================================================
//	Ä GetMessages
// ===========================================================================
//	Get messages to broadcast before and after selection changes.

void cBroadcastingMultiSelector::GetMessages(MessageT& outAboutToChangeMessage, MessageT& outChangedMsg){
	
	outAboutToChangeMessage = mAboutToChangeMsg,
	outChangedMsg = mChangedMsg;
}