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#include "widgetbox_dnditem.h"

#include "ui4_p.h"

#include <widgetfactory_p.h>

#include <spacer_widget_p.h>

#include <qdesigner_formbuilder_p.h>

#include <qtresourcemodel_p.h>

#include <formscriptrunner_p.h>

#include <formwindowbase_p.h>

#include <qdesigner_utils_p.h>

#include <qdesigner_dockwidget_p.h>

#include <qsimpleresource_p.h>

#include <QtDesigner/QDesignerFormEditorInterface>

#include <QtDesigner/QDesignerFormWindowManagerInterface>

#include <QtGui/QStyle>

#include <QtGui/QApplication>

QT_BEGIN_NAMESPACE

namespace qdesigner_internal {

/*******************************************************************************

** WidgetBoxResource

*/

static inline DeviceProfile currentDeviceProfile(const QDesignerFormEditorInterface *core)

{

    if (QDesignerFormWindowInterface *cfw = core->formWindowManager()->activeFormWindow())

        if (const FormWindowBase *fwb = qobject_cast<const FormWindowBase *>(cfw))

            return fwb->deviceProfile();

    return DeviceProfile();

}

class WidgetBoxResource : public QDesignerFormBuilder

{

public:

    WidgetBoxResource(QDesignerFormEditorInterface *core);

    // protected->public

   QWidget *createUI(DomUI *ui, QWidget *parents) { return QDesignerFormBuilder::create(ui, parents); }

protected:

    virtual QWidget *create(DomWidget *ui_widget, QWidget *parents);

    virtual QWidget *createWidget(const QString &widgetName, QWidget *parentWidget, const QString &name);

    virtual void createCustomWidgets(DomCustomWidgets *);

};

WidgetBoxResource::WidgetBoxResource(QDesignerFormEditorInterface *core) :

    QDesignerFormBuilder(core, DisableScripts, currentDeviceProfile(core))

{

}

QWidget *WidgetBoxResource::createWidget(const QString &widgetName, QWidget *parentWidget, const QString &name)

{

    if (widgetName == QLatin1String("Spacer")) {

        Spacer *spacer = new Spacer(parentWidget);

        spacer->setObjectName(name);

        return spacer;

    }

    return QDesignerFormBuilder::createWidget(widgetName, parentWidget, name);

}

QWidget *WidgetBoxResource::create(DomWidget *ui_widget, QWidget *parent)

{

    QWidget *result = QDesignerFormBuilder::create(ui_widget, parent);

    // It is possible to have a syntax error or something in custom

    // widget XML, so, try to recover here by creating an artificial

    // top level + widget.

    if (!result) {

        const QString msg = QApplication::translate("qdesigner_internal::WidgetBox", "Warning: Widget creation failed in the widget box. This could be caused by invalid custom widget XML.");

        qdesigner_internal::designerWarning(msg);

        result = new QWidget(parent);

        new QWidget(result);

    }

    result->setFocusPolicy(Qt::NoFocus);

    result->setObjectName(ui_widget->attributeName());

    return result;

}

void WidgetBoxResource::createCustomWidgets(DomCustomWidgets *dc)

{

    // Make a promotion entry in  case someone has a promoted widget

    // in the scratchpad.

    QSimpleResource::handleDomCustomWidgets(core(), dc);

}

/*******************************************************************************

** WidgetBoxResource

*/

static QSize geometryProp(const DomWidget *dw)

{

    const QList<DomProperty*> prop_list = dw->elementProperty();

    const QString geometry = QLatin1String("geometry");

    foreach (DomProperty *prop, prop_list) {

        if (prop->attributeName() !=  geometry)

            continue;

        DomRect *dr = prop->elementRect();

        if (dr == 0)

            continue;

        return QSize(dr->elementWidth(), dr->elementHeight());

    }

    return QSize();

}

static QSize domWidgetSize(const DomWidget *dw)

{

    QSize size = geometryProp(dw);

    if (size.isValid())

        return size;

    foreach (const DomWidget *child, dw->elementWidget()) {

        size = geometryProp(child);

        if (size.isValid())

            return size;

    }

    foreach (const DomLayout *dl, dw->elementLayout()) {

        foreach (DomLayoutItem *item, dl->elementItem()) {

            const DomWidget *child = item->elementWidget();

            if (child == 0)

                continue;

            size = geometryProp(child);

            if (size.isValid())

                return size;

        }

    }

    return QSize();

}

static QWidget *decorationFromDomWidget(DomUI *dom_ui, QDesignerFormEditorInterface *core)

{

    WidgetBoxResource builder(core);

    // We have the builder create the articial QWidget fake top level as a tooltip

    // because the size algorithm works better at weird DPI settings

    // if the actual widget is created as a child of a container

    QWidget *fakeTopLevel = builder.createUI(dom_ui, static_cast<QWidget*>(0));

    fakeTopLevel->setParent(0, Qt::ToolTip); // Container

    // Actual widget

    const DomWidget *domW = dom_ui->elementWidget()->elementWidget().front();

    QWidget *w = qFindChildren<QWidget*>(fakeTopLevel).front();

    Q_ASSERT(w);

    // hack begin;

    // We set _q_dockDrag dynamic property which will be detected in drag enter event of form window.

    // Dock drop is handled in special way (highlight goes to central widget of main window)

    if (qobject_cast<QDesignerDockWidget *>(w))

        fakeTopLevel->setProperty("_q_dockDrag", QVariant(true));

    // hack end;

    w->setAutoFillBackground(true); // Different style for embedded

    QSize size = domWidgetSize(domW);

    const QSize minimumSize = w->minimumSizeHint();

    if (!size.isValid())

        size = w->sizeHint();

    if (size.width() < minimumSize.width())

        size.setWidth(minimumSize.width());

    if (size.height() < minimumSize.height())

        size.setHeight(minimumSize.height());

    // A QWidget might have size -1,-1 if no geometry property is specified in the widget box.

    if (size.isEmpty())

        size = size.expandedTo(QSize(16, 16));

    w->setGeometry(QRect(QPoint(0, 0), size));

    fakeTopLevel->resize(size);

    return fakeTopLevel;

}

WidgetBoxDnDItem::WidgetBoxDnDItem(QDesignerFormEditorInterface *core,

                                   DomUI *dom_ui,

                                   const QPoint &global_mouse_pos) :

    QDesignerDnDItem(CopyDrop)

{

    QWidget *decoration = decorationFromDomWidget(dom_ui, core);

    decoration->move(global_mouse_pos - QPoint(5, 5));

    init(dom_ui, 0, decoration, global_mouse_pos);

}

}

QT_END_NAMESPACE