cxControllableSplitter.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.
                 
Copyright (c) SINTEF Department of Medical Technology.
All rights reserved.
                 
CustusX is released under a BSD 3-Clause license.
                 
See Lisence.txt (https://github.com/SINTEFMedtek/CustusX/blob/master/License.txt) for details.
=========================================================================*/
#include "cxControllableSplitter.h"

#include <QSplitter>
#include <QVBoxLayout>
#include <QAction>
#include <QTimer>
#include "cxLogger.h"

namespace cx
{

ControllableSplitter::ControllableSplitter(XmlOptionFile options, QWidget *parent) :
        mShiftSplitterLeft(NULL),
        mShiftSplitterRight(NULL),
        mSplitterRatio(0.5),
        mOptions(options)
{
        QVBoxLayout* layout = new QVBoxLayout(this);
        layout->setMargin(0);
        layout->setSpacing(0);

        mSplitter = new QSplitter(Qt::Horizontal);
        connect(mSplitter, &QSplitter::splitterMoved, this, &ControllableSplitter::onSplitterMoved);

        layout->addWidget(mSplitter, 1);

        mSplitterRatio = this->getSplitterRatioOption().readValue(QString::number(0.5)).toDouble();

        // must set geometry after sizes have been set, i.e. after return to the main loop:
        QTimer::singleShot(0, this, SLOT(initializeSettings()));
}

ControllableSplitter::~ControllableSplitter()
{
        this->getSplitterRatioOption().writeValue(QString::number(mSplitterRatio));
        this->getShiftStateOption().writeValue(QString::number(this->getShiftState()));
}

XmlOptionItem ControllableSplitter::getSplitterRatioOption()
{
        return XmlOptionItem("splitter_ratio", mOptions.getElement());
}

XmlOptionItem ControllableSplitter::getShiftStateOption()
{
        return XmlOptionItem("shift_state", mOptions.getElement());
}

void ControllableSplitter::addLeftWidget(QWidget *widget, QString name)
{
        mLeftName = name;
        mSplitter->insertWidget(0, widget);
}
void ControllableSplitter::addRightWidget(QWidget *widget, QString name)
{
        mRightName = name;
        mSplitter->insertWidget(1, widget);
}

void ControllableSplitter::initializeSettings()
{
        this->setShiftState(this->getShiftStateOption().readValue("0").toInt());
        this->onSplitterMoved();
}

QAction* ControllableSplitter::getMoveLeftAction()
{
        if (!mShiftSplitterLeft)
        {
                QAction* action = new QAction(QIcon(":/icons/open_icon_library/arrow-left-3.png"),
                                                                          QString("Show %1").arg(mRightName), this);
                action->setToolTip(QString("Show more %1").arg(mRightName));
                action->setStatusTip(action->toolTip());
                connect(action, &QAction::triggered, this, &ControllableSplitter::onMoveSplitterLeft);
                mShiftSplitterLeft = action;
                this->enableActions();
        }
        return mShiftSplitterLeft;
}

QAction* ControllableSplitter::getMoveRightAction()
{
        if (!mShiftSplitterRight)
        {
                QAction* action = new QAction(QIcon(":/icons/open_icon_library/arrow-right-3.png"),
                                                                          QString("Show %1").arg(mLeftName), this);
                action->setToolTip(QString("Show more %1").arg(mLeftName));
                action->setStatusTip(action->toolTip());
                connect(action, &QAction::triggered, this, &ControllableSplitter::onMoveSplitterRight);
                mShiftSplitterRight = action;
                this->enableActions();
        }
        return mShiftSplitterRight;
}

void ControllableSplitter::onMoveSplitterLeft()
{
        this->shiftSplitter(-1);
}

void ControllableSplitter::onMoveSplitterRight()
{
        this->shiftSplitter(+1);
}

void ControllableSplitter::onSplitterMoved()
{
        QList<int> sizes = mSplitter->sizes();
        if (this->splitterShowsBoth())
                mSplitterRatio = double(sizes[0]) /double(sizes[0]+sizes[1]);

        this->enableActions();
}

void ControllableSplitter::enableActions()
{
        if (mShiftSplitterLeft)
                mShiftSplitterLeft->setEnabled(this->getShiftState()>=0);
        if (mShiftSplitterRight)
                mShiftSplitterRight->setEnabled(this->getShiftState()<=0);
}

bool ControllableSplitter::splitterShowsBoth() const
{
        QList<int> sizes = mSplitter->sizes();
        return (( sizes.size()==2 )&&( sizes[0]!=0 )&&( sizes[1]!=0 ));
}

int ControllableSplitter::getShiftState() const
{
        QList<int> sizes = mSplitter->sizes();

        if(sizes[0]==0)
                return -1;
        else if(sizes[1]==0)
                return 1;
        else
                return 0;
}

void ControllableSplitter::setShiftState(int shiftState)
{
        QList<int> sizes = mSplitter->sizes();

        if (shiftState<0) // show props
        {
                sizes[0] = 0;
                sizes[1] = 1;
        }
        else if (shiftState>0) // show browser
        {
                sizes[0] = 1;
                sizes[1] = 0;
        }
        else // show both
        {
                int sizesum = sizes[0]+sizes[1];
                if (sizesum==0) // if size has not been initialized
                        sizesum = 1000;
                sizes[0] = mSplitterRatio * sizesum;
                sizes[1] = (1.0-mSplitterRatio) * sizesum;
        }

        mSplitter->setSizes(sizes);

        this->onSplitterMoved();
}

void ControllableSplitter::shiftSplitter(int shift)
{
        // positive shift axis goes to the right, from browser to properties

        int shiftState = this->getShiftState();
        shiftState += shift;
        this->setShiftState(shiftState);
}

}//end namespace cx