#include "tdockwindows.h"

#include <qboxlayout></qboxlayout>

#include <qvboxlayout></qvboxlayout>

#include <qregion></qregion>

#include <qpainter></qpainter>

#include <qstyleoption></qstyleoption>

#include <qmouseevent></qmouseevent>

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

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

//    Decorations

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

class TDockDecoAllocator final : public DockDecoAllocator {

  DockSeparator *newSeparator(DockLayout *owner, bool orientation,

                              Region *parentRegion) override;

  DockPlaceholder *newPlaceholder(DockWidget *owner, Region *r, int idx,

                                  int attributes) override;

};

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

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

//    TMainWindow

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

TMainWindow::TMainWindow(QWidget *parent, Qt::WindowFlags flags)

    : QWidget(parent, flags) {

  // Delete on close

  setAttribute(Qt::WidgetAttribute(Qt::WA_DeleteOnClose));

  // Set a vertical layout to include menu bars

  QVBoxLayout *vlayout = new QVBoxLayout;

  vlayout->setMargin(0);

  vlayout->setSpacing(4);

  setLayout(vlayout);

  // Allocate the dock layout

  m_layout = new DockLayout;

  m_layout->setContentsMargins(0, 0, 0, 0);

  m_layout->setSpacing(4);

  m_layout->setDecoAllocator(new TDockDecoAllocator);

  vlayout->addLayout(m_layout);

  vlayout->setAlignment(m_layout, Qt::AlignTop);

  show();  // NOTA: E' NECESSARIO MOSTRARE LA FINESTRA, prima di dockare

           // qualcosa (altrimenti non viene fatto

  // l'update della geometria della main window, e il contentsRect del layout

  // viene sballato!!).

}

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

TMainWindow::~TMainWindow() {}

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

//! Adds input \b item to this TMainWindow. If item was already

//! assigned to \b this TMainWindow, nothing happens.

void TMainWindow::addDockWidget(TDockWidget *item) {

  if (!m_layout->find(item)) m_layout->addWidget(item);

}

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

void TMainWindow::removeDockWidget(TDockWidget *item) {

  m_layout->removeWidget(item);

}

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

// NOTE: Unlike QMainWindow::addToolBar, we only allow one

// fixed-size undockable menu bar at top of the dock layout.

void TMainWindow::setMenuWidget(QWidget *menubar) {

  if (menubar) {

    QVBoxLayout *vlayout = static_cast<qvboxlayout *="">(layout());</qvboxlayout>

    // If necessary, remove current menu bar

    if (m_menu && m_menu != menubar) vlayout->removeWidget(m_menu);

    vlayout->insertWidget(0, menubar);

  }

}

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

void TMainWindow::setDecoAllocator(DockDecoAllocator *allocator) {

  m_layout->setDecoAllocator(allocator);

}

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

//! Sets global thickness of separators between dock widget.

void TMainWindow::setSeparatorsThickness(int thick) {

  if (thick > 0) {

    m_layout->setSpacing(thick);

    m_layout->redistribute();

  }

}

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

void TMainWindow::resizeEvent(QResizeEvent *event) { m_layout->redistribute(); }

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

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

//    TDockWidget

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

//! Constructs a TDockWidget with given parent and window flags. If parent is

//! a TMainWindow, then the constructed dock widget is assigned to it

//! (addDockWidget'd).

//! TDockWidgets are always floating at construction.

TDockWidget::TDockWidget(QWidget *parent, Qt::WindowFlags flags)

    : DockWidget(parent, flags), m_widget(0), m_titlebar(0), m_margin(5) {

  setAutoFillBackground(false);

  // setFrameStyle(QFrame::StyledPanel);

  QBoxLayout *layout = new QBoxLayout(QBoxLayout::TopToBottom);

  layout->setSpacing(0);

  setLayout(layout);

  // Check if parent is a TMainWindow class

  TMainWindow *parentMain = qobject_cast<tmainwindow *="">(parent);</tmainwindow>

  if (parentMain) parentMain->addDockWidget(this);

  setDecoAllocator(new TDockDecoAllocator);

}

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

TDockWidget::TDockWidget(const QString &title, QWidget *parent,

                         Qt::WindowFlags flags)

    : DockWidget(parent, flags), m_widget(0), m_titlebar(0), m_margin(5) {

  setWindowTitle(title);

  QBoxLayout *layout = new QBoxLayout(QBoxLayout::TopToBottom);

  layout->setSpacing(0);

  setLayout(layout);

}

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

void TDockWidget::setTitleBarWidget(QWidget *titlebar) {

  if (titlebar) {

    QBoxLayout *boxLayout = static_cast<qboxlayout *="">(layout());</qboxlayout>

    if (m_titlebar && m_titlebar != titlebar)

      boxLayout->removeWidget(m_titlebar);

    boxLayout->insertWidget(0, titlebar);

    // Set top/left-aligned

    boxLayout->setAlignment(

        titlebar, getOrientation() == vertical ? Qt::AlignTop : Qt::AlignLeft);

    m_titlebar = titlebar;

    if (m_floating) setFloatingAppearance();

  }

}

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

void TDockWidget::windowTitleEvent(QEvent *e) {

  if (m_titlebar) m_titlebar->update();

}

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

void TDockWidget::setWidget(QWidget *widget) {

  if (widget) {

    QBoxLayout *boxLayout = static_cast<qboxlayout *="">(layout());</qboxlayout>

    if (m_widget && m_widget != widget) boxLayout->removeWidget(m_widget);

    boxLayout->insertWidget(1, widget);

    widget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

    m_widget = widget;

  }

}

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

void TDockWidget::setFloatingAppearance() {

  if (m_titlebar) {

    // If has a custom title bar, impose a margin to the layout

    // to provide a frame.

    layout()->setMargin(m_margin);

    if (!m_floating)  // was docked

    {

      // Adding margin to extremal sizes

      int addition = 2 * m_margin;

      setMinimumSize(

          QSize(minimumWidth() + addition, minimumHeight() + addition));

      setMaximumSize(

          QSize(maximumWidth() + addition, maximumHeight() + addition));

    }

  }

  // else

  //  setWindowFlags(Qt::Tool);

}

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

void TDockWidget::setDockedAppearance() {

  // No layout margin is visible when docked

  layout()->setMargin(0);

  if (m_floating)  // was floating

  {

    // Removing margin from extremal sizes

    int addition = 2 * m_margin;

    setMinimumSize(

        QSize(minimumWidth() - addition, minimumHeight() - addition));

    setMaximumSize(

        QSize(maximumWidth() - addition, maximumHeight() - addition));

  }

}

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

bool TDockWidget::isDragGrip(QPoint p) {

  if (!m_titlebar) return DockWidget::isDragGrip(p);

  return m_titlebar->geometry().contains(p);

}

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

int TDockWidget::isResizeGrip(QPoint p) {

  if (m_dragging || (!m_titlebar && m_floating)) return 0;

  int marginType = 0;

  QRect geom(QPoint(0, 0), QPoint(width(), height()));

  int margin = layout()->margin();

  QRect contGeom(geom.adjusted(margin, margin, -margin, -margin));

  if (geom.contains(p) && !contGeom.contains(p)) {

    if (p.x() < 15) marginType |= leftMargin;

    if (p.y() < 15) marginType |= topMargin;

    if (p.x() > width() - 15) marginType |= rightMargin;

    if (p.y() > height() - 15) marginType |= bottomMargin;

  }

  return marginType;

}

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

//! Currently working only for \b status = true. If you need to

//! dock a TDockWidget, you \b must specify a dock location by either

//! choosing a placeholder or identifying the Region and insertion index,

//! and then running 'parentLayout()->dockItem(..)'.

void TDockWidget::setFloating(bool status) {

  if (status) {

    setWindowFlags(Qt::Tool | Qt::FramelessWindowHint);

    if (!m_floating) parentLayout()->undockItem(this);

  }

}

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

//! Specifies the orientation of the dock widget. It can

//! be either \b vertical (default) or \b horizontal, meaning that

//! the titlebar is laid respectively at the top or left side of

//! content widget. Directly speaking, it is equivalent to setting the

//! Qt's QDockWidget::DockWidgetVerticalTitleBar feature.

void TDockWidget::setOrientation(bool direction) {

  QBoxLayout *boxLayout = static_cast<qboxlayout *="">(layout());</qboxlayout>

  QBoxLayout::Direction boxDirection;

  if (direction == vertical) {

    boxLayout->setAlignment(m_titlebar, Qt::AlignTop);

    boxDirection = QBoxLayout::TopToBottom;

  } else {

    boxLayout->setAlignment(m_titlebar, Qt::AlignLeft);

    boxDirection = QBoxLayout::LeftToRight;

  }

  boxLayout->setDirection(boxDirection);

}

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

bool TDockWidget::getOrientation() const {

  QBoxLayout *boxLayout = static_cast<qboxlayout *="">(layout());</qboxlayout>

  return (boxLayout->direction() == QBoxLayout::TopToBottom) ? vertical

                                                             : horizontal;

}

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

//! Maximizes \b this TDockWidget, if docked.

void TDockWidget::setMaximized(bool status) {

  parentLayout()->setMaximized(this, status);

}

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

QSize TDockWidget::getDockedMinimumSize() {

  int addedSize = 2 * m_margin;

  return m_floating ? minimumSize() -= QSize(addedSize, addedSize)

                    : minimumSize();

}

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

QSize TDockWidget::getDockedMaximumSize() {

  int addedSize = 2 * m_margin;

  return m_floating ? maximumSize() -= QSize(addedSize, addedSize)

                    : maximumSize();

}

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

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

//    Custom Decorations

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

class TDockSeparator final : public DockSeparator {

public:

  TDockSeparator(DockLayout *owner, bool orientation, Region *parentRegion)

      : DockSeparator(owner, orientation, parentRegion) {}

  void paintEvent(QPaintEvent *pe) override;

};

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

class TDockPlaceholder final : public DockPlaceholder {

  QWidget *m_associated[3];

public:

  TDockPlaceholder(DockWidget *owner, Region *r, int idx, int attributes);

  ~TDockPlaceholder();

  void buildGeometry() override;

  void showEvent(QShowEvent *se) override;

  void hideEvent(QHideEvent *he) override;

};

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

TDockPlaceholder::TDockPlaceholder(DockWidget *owner, Region *r, int idx,

                                   int attributes)

    : DockPlaceholder(owner, r, idx, attributes) {

  setAutoFillBackground(true);

  setObjectName("TDockPlaceholder");

  setWindowOpacity(0.8);

}

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

TDockPlaceholder::~TDockPlaceholder() {

  if (isRoot()) {

    delete m_associated[0];

    delete m_associated[1];

    delete m_associated[2];

  }

}

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

inline void TDockPlaceholder::buildGeometry() {

  DockPlaceholder::buildGeometry();

  if (isRoot()) {

    // Solution 2: Set associated widgets

    QRect geom(geometry());

    QSize horSize(geom.width(), 6);

    QSize vertSize(6, geom.height() + 12);

    setGeometry(QRect(geom.topLeft() - QPoint(6, 6), vertSize));

    m_associated[0] = new TDockPlaceholder(0, 0, 0, 0);

    m_associated[0]->setGeometry(QRect(geom.topLeft() - QPoint(0, 6), horSize));

    m_associated[1] = new TDockPlaceholder(0, 0, 0, 0);

    m_associated[1]->setGeometry(

        QRect(geom.topRight() + QPoint(1, -6), vertSize));

    m_associated[2] = new TDockPlaceholder(0, 0, 0, 0);

    m_associated[2]->setGeometry(

        QRect(geom.bottomLeft() + QPoint(0, 1), horSize));

  }

}

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

void TDockPlaceholder::showEvent(QShowEvent *se) {

  if (isRoot()) {

    // Show associated widgets

    m_associated[0]->show();

    m_associated[1]->show();

    m_associated[2]->show();

  }

}

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

void TDockPlaceholder::hideEvent(QHideEvent *he) {

  if (isRoot()) {

    // Show associated widgets

    m_associated[0]->hide();

    m_associated[1]->hide();

    m_associated[2]->hide();

  }

}

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

void TDockSeparator::paintEvent(QPaintEvent *pe) {

  QPainter p(this);

  QStyleOption opt(0);

  opt.state = (getOrientation() == Region::horizontal)

                  ? QStyle::State_None

                  : QStyle::State_Horizontal;

  /*if (w->isEnabled())

opt.state |= QStyle::State_Enabled;

if (o != Qt::Horizontal)

opt.state |= QStyle::State_Horizontal;

if (mouse_over)

opt.state |= QStyle::State_MouseOver;*/

  opt.rect    = QRect(QPoint(0, 0), QSize(geometry().size()));

  opt.palette = palette();

  style()->drawPrimitive(QStyle::PE_IndicatorDockWidgetResizeHandle, &opt, &p,

                         this);

  p.end();

}

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

DockSeparator *TDockDecoAllocator::newSeparator(DockLayout *owner,

                                                bool orientation,

                                                Region *parentRegion) {

  return new TDockSeparator(owner, orientation, parentRegion);

}

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

DockPlaceholder *TDockDecoAllocator::newPlaceholder(DockWidget *owner,

                                                    Region *r, int idx,

                                                    int attributes) {

  return new TDockPlaceholder(owner, r, idx, attributes);

}

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

void TDockWidget::selectDockPlaceholder(QMouseEvent *me) {

  if (m_placeholders.size() && m_placeholders[0]->isRoot()) {

    DockPlaceholder *selected = 0;

    QPoint pos = parentWidget()->mapFromGlobal(me->globalPos());

    if (parentLayout()->contentsRect().contains(pos))

      selected = m_placeholders[0];

    if (m_selectedPlace != selected) {

      if (m_selectedPlace) m_selectedPlace->hide();

      if (selected) selected->show();

    }

    m_selectedPlace = selected;

  } else

    DockWidget::selectDockPlaceholder(me);

}