// TnzLib includes
#include "toonz/tframehandle.h"

// TnzQt includes
#include "toonzqt/gutil.h"

// Qt includes
#include <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 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()));
}