// $Revision: 1.3 $
// RangeSelector.C
// Copyright (C) 1994, 1995 Taligent, Inc. All rights reserved.

#ifndef TaligentSamples_RANGESELECTOR
#include "RangeSelector.h"
#endif

#ifndef TaligentSamples_SELECTIONTARGET
#include "SelectionTarget.h"
#endif

#ifndef TaligentSamples_CURRENTSELECTIONTARGET
#include "CurrentSelectionTarget.h"
#endif

#ifndef Taligent_VIEW
#include <Taligent/View.h>
#endif

#ifndef Taligent_COMPOUNDDOCUMENT
#include <Taligent/CompoundDocument.h>
#endif

#ifndef Taligent_KEYBOARDINPUT
#include <Taligent/KeyboardInput.h>
#endif

#ifndef TaligentSamples_HIGHLIGHTFEEDBACKSTYLE
#include "HighlightFeedbackStyle.h"
#endif

#ifndef TaligentSamples_BOUNDSFEEDBACKSTYLE
#include "BoundsFeedbackStyle.h"
#endif

//................................................................................

#ifndef TaligentSamples_DYNAMICCREATIONCASTTO
#define TaligentSamples_DYNAMICCREATIONCASTTO

template <class TDEST, class TSOURCE>
bool DynamicCreationCastTo(TDeleterFor<TDEST>& dest, TSOURCE* sourceToAdopt)
{
	TDEST* result;
	DynamicCastTo(result, sourceToAdopt);
	if (result == NIL) {
		delete sourceToAdopt;
	}
	else {
		dest = result;
	}
	return result != NIL;
}

#endif

//................................................................................

TaligentTypeExtensionMacro_Abstract(TRangeSelector)

TRangeSelector::TRangeSelector(MToolHandler* handler)
	: TInteractor(),
	MMouseEventHandler(),
	fHandler(handler),
	fAnchorPoint(),
	fInitialSelection(),
	fBandSelection(NIL),
	fNewSelection(NIL)
{
}

TRangeSelector::~TRangeSelector()
{
}

bool				
TRangeSelector::MouseDown(TMouseDownEvent& mouseDown)
{
	static const TTypeDescription kSelectionTargetType(StaticTypeInfo(TSelectionTarget));
	static const TTypeDescription kCurrentSelectionTargetType(StaticTypeInfo(TCurrentSelectionTarget));
	fAnchorPoint = mouseDown.GetGlobalEventPosition();
	
	DynamicCreationCastTo(fNewSelection,
		fHandler->CreateToolTarget(kSelectionTargetType, fAnchorPoint));
	
	DynamicCreationCastTo(fBandSelection,
		fHandler->CreateToolTarget(kSelectionTargetType, fAnchorPoint));

	if (fBandSelection != NIL && fNewSelection != NIL) {
		Assertion(fNewSelection->GetCoordinateView() == fBandSelection->GetCoordinateView());
		SetCoordinateView(fNewSelection->GetCoordinateView());
		fNewSelection->GetCoordinateView().GetView()->GlobalToLocal(fAnchorPoint);
		
		bool extendSelection = 
			TKeyboardInputDevice::GetDefaultKeyboardInputDevice(mouseDown)->GetModifierKeys().IsPowerKeyDown();
		if (extendSelection) {
			TDeleterFor<TCurrentSelectionTarget> currentSelection;
			DynamicCreationCastTo(currentSelection,
				fHandler->CreateToolTarget(kCurrentSelectionTargetType, fAnchorPoint));
			
			if (currentSelection != NIL) {
				fInitialSelection = currentSelection->GetSelectionDisplayArea();
			}
			else {
				fNewSelection = NIL;
				fBandSelection = NIL;
			}
		}
		else {
			fInitialSelection.SetToEmpty();
		}
		
		SyncSelections(fAnchorPoint);
		SyncFeedback(fAnchorPoint);
		StartMouseMovedEvents(*(TMouseInputDevice*)mouseDown.GetInputDevice());
	}
	else {
		SetDone(true);
	}
	return fNewSelection != NIL && fBandSelection != NIL;
}

bool				
TRangeSelector::MouseMoved(TMouseMovedEvent& mouseMoved)
{
	SyncSelections(mouseMoved.GetEventPosition());
	SyncFeedback(mouseMoved.GetEventPosition());
	return true;
}

bool
TRangeSelector::MouseUp(TMouseUpEvent& mouseUp)
{
	static const TTypeDescription kCurrentSelectionTargetType(StaticTypeInfo(TCurrentSelectionTarget));

	StopMouseMovedEvents();
	SetDone(true);
	
	SyncSelections(mouseUp.GetEventPosition());

	TDeleterFor<TCurrentSelectionTarget> currentSelection;
	DynamicCreationCastTo(currentSelection,
		fHandler->CreateToolTarget(kCurrentSelectionTargetType, fAnchorPoint));

	currentSelection->AdoptSelection(::Copy(*fNewSelection->GetSelection()));

	return true;
}

void
TRangeSelector::SyncSelections(const TGPoint& where)
{
	TGPoint endPoint(where);
	TGPoint startPoint(fAnchorPoint);
	TGRect bounds(fBandSelection->GetCoordinateView().GetView()->GetAllocatedArea());
	bounds.Pin(startPoint);
	bounds.Pin(endPoint);
	TGRect bandBox(startPoint, endPoint);
	bandBox.OrderPoints();

	if (bandBox.IsEmpty()) {
		fBandSelection->SetSelectedArea(where);
	}
	else {
		fBandSelection->SetSelectedArea(bandBox);
	}
	fNewSelection->SetSelectedArea(
		fInitialSelection ^ fBandSelection->GetSelectionDisplayArea());	
}

void
TRangeSelector::SyncFeedback(const TGPoint& where)
{
	fNewSelection->AdoptFeedback(THighlightFeedbackStyle().CreateFeedback(*fNewSelection));

	TGPoint endPoint(where);
	TGPoint startPoint(fAnchorPoint);
	TGRect bounds(fBandSelection->GetCoordinateView().GetView()->GetAllocatedArea());
	bounds.Pin(endPoint);
	bounds.Pin(startPoint);
	TGRect bandBox(startPoint, endPoint);
	bandBox.OrderPoints();
	
	fBandSelection->AdoptFeedback(
		TBoundsFeedbackStyle().DoCreateFeedback(TGArea(bandBox)));
}