// TnzLib includes

#include "toonz/tframehandle.h"

// TnzQt includes

#include "toonzqt/gutil.h"

// Qt includes

#include <qaction></qaction>

#include "toonzqt/framenavigator.h"

using namespace DVGui;

//=============================================================================

// FrameNavigator

//-----------------------------------------------------------------------------

FrameNavigator::FrameNavigator(QWidget *parent)

	: QToolBar(parent), m_frame(0), m_lineEdit(0), m_frameHandle(0)

{

	setMaximumWidth(130);

	QAction *prevButton = new QAction(createQIconPNG("frameprev"), tr("Previous Frame"), this);

	connect(prevButton, SIGNAL(triggered()), this, SLOT(prevFrame()));

	addAction(prevButton);

	m_lineEdit = new DVGui::IntLineEdit(this);

	m_lineEdit->setFixedHeight(16);

	bool ret = connect(m_lineEdit, SIGNAL(editingFinished()), this, SLOT(onEditingFinished()));

	addWidget(m_lineEdit);

	QAction *nextButton = new QAction(createQIconPNG("framenext"), tr("Next Frame"), this);

	ret = ret && connect(nextButton, SIGNAL(triggered()), this, SLOT(nextFrame()));

	addAction(nextButton);

	assert(ret);

}

//-----------------------------------------------------------------------------

bool FrameNavigator::anyWidgetHasFocus()

{

	return hasFocus() ||

		   m_lineEdit->hasFocus() ||

		   m_lineEdit->hasFocus();

}

//-----------------------------------------------------------------------------

void FrameNavigator::setFrameHandle(TFrameHandle *fh)

{

	if (fh == m_frameHandle)

		return;

	if (isVisible() && m_frameHandle)

		disconnect(m_frameHandle, SIGNAL(frameSwitched()), this, SLOT(onFrameSwitched()));

	m_frameHandle = fh;

	if (m_frameHandle) {

		if (isVisible())

			connect(m_frameHandle, SIGNAL(frameSwitched()), this, SLOT(onFrameSwitched()));

		updateFrame(m_frameHandle->getFrame());

	}

}

//-----------------------------------------------------------------------------

void FrameNavigator::updateFrame(int frame)

{

	m_frame = frame;

	m_lineEdit->setValue(m_frame + 1);

}

//-----------------------------------------------------------------------------

void FrameNavigator::setFrame(int frame, bool notifyFrameHandler)

{

	if (m_frame == frame)

		return;

	updateFrame(frame);

	if (m_frameHandle && notifyFrameHandler)

		m_frameHandle->setFrame(frame);

	if (notifyFrameHandler)

		emit frameSwitched();

}

//-----------------------------------------------------------------------------

void FrameNavigator::onEditingFinished()

{

	setFrame(m_lineEdit->getValue() - 1, true);

}

//-----------------------------------------------------------------------------

void FrameNavigator::onFrameSwitched()

{

	if (m_frameHandle)

		updateFrame(m_frameHandle->getFrame());

}

//-----------------------------------------------------------------------------

void FrameNavigator::showEvent(QShowEvent *)

{

	onFrameSwitched();

	if (m_frameHandle)

		connect(m_frameHandle, SIGNAL(frameSwitched()), this, SLOT(onFrameSwitched()));

}

//-----------------------------------------------------------------------------

void FrameNavigator::hideEvent(QHideEvent *)

{

	if (m_frameHandle)

		disconnect(m_frameHandle, SIGNAL(frameSwitched()), this, SLOT(onFrameSwitched()));

}