widgetselection.cpp

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#include "widgetselection.h"
#include "formwindow.h"
#include "formwindowmanager.h"

// sdk
#include <QtDesigner/QDesignerFormEditorInterface>
#include <QtDesigner/QExtensionManager>
#include <QtDesigner/QDesignerTaskMenuExtension>

// shared
#include <qdesigner_command_p.h>
#include <qdesigner_propertycommand_p.h>
#include <layout_p.h>
#include <layoutinfo_p.h>
#include <formwindowbase_p.h>
#include <grid_p.h>

#include <QtGui/QMenu>
#include <QtGui/QWidget>
#include <QtGui/QMouseEvent>
#include <QtGui/QStylePainter>
#include <QtGui/QGridLayout>
#include <QtGui/QStyleOptionToolButton>

#include <QtCore/QVariant>
#include <QtCore/qdebug.h>

#define NO_TOPWIDGET


namespace qdesigner_internal
{


class TopWidget: public InvisibleWidget
{
    Q_OBJECT
public:
    TopWidget(QWidget *parent)
        : InvisibleWidget(parent)
    {
        setAttribute(Qt::WA_TransparentForMouseEvents);
    }
};

WidgetHandle::WidgetHandle(FormWindow *parent, WidgetHandle::Type t, WidgetSelection *s)
    : InvisibleWidget(parent->mainContainer()),
    m_widget(0),
    m_type(t),
    m_formWindow( parent),
    m_sel(s),
    m_active(true)
{
    setMouseTracking(false);
    setAutoFillBackground(true);

    if (m_type == TaskMenu) {
        setBackgroundRole(QPalette::Button);
        setFixedSize(12, 12);
    } else {
        setBackgroundRole(m_active ? QPalette::Text : QPalette::Dark);
        setFixedSize(6, 6);
    }

    updateCursor();
}

void WidgetHandle::updateCursor()
{
    if (!m_active) {
        setCursor(Qt::ArrowCursor);
        return;
    }

    switch (m_type) {
    case LeftTop:
        setCursor(Qt::SizeFDiagCursor);
        break;
    case Top:
        setCursor(Qt::SizeVerCursor);
        break;
    case RightTop:
        setCursor(Qt::SizeBDiagCursor);
        break;
    case Right:
        setCursor(Qt::SizeHorCursor);
        break;
    case RightBottom:
        setCursor(Qt::SizeFDiagCursor);
        break;
    case Bottom:
        setCursor(Qt::SizeVerCursor);
        break;
    case LeftBottom:
        setCursor(Qt::SizeBDiagCursor);
        break;
    case Left:
        setCursor(Qt::SizeHorCursor);
        break;
    case TaskMenu:
        setCursor(Qt::ArrowCursor);
        break;
    default:
        Q_ASSERT(0);
    }
}

QDesignerFormEditorInterface *WidgetHandle::core() const
{
    if (m_formWindow)
        return m_formWindow->core();

    return 0;
}

void WidgetHandle::setActive(bool a)
{
    m_active = a;
    if (m_type != TaskMenu) {
        setBackgroundRole(m_active ? QPalette::Text : QPalette::Dark);
    }
    updateCursor();
}

void WidgetHandle::setWidget(QWidget *w)
{
    m_widget = w;
}

void WidgetHandle::paintEvent(QPaintEvent *)
{
    QDesignerFormWindowManagerInterface *m = m_formWindow->core()->formWindowManager();

    QStylePainter p(this);
    if (m_type == TaskMenu) {
        QStyleOptionToolButton option;
        option.init(this);
        option.state |= QStyle::State_Raised;
        option.arrowType = Qt::RightArrow;
        option.toolButtonStyle = Qt::ToolButtonIconOnly;
        option.features = QStyleOptionToolButton::Arrow;
        option.subControls = QStyle::SC_ToolButton;
        p.drawComplexControl(QStyle::CC_ToolButton, option);
    } else if (m_formWindow->currentWidget() == m_widget) {
        p.setPen(m->activeFormWindow() == m_formWindow ? Qt::blue : Qt::red);
        p.drawRect(0, 0, width() - 1, height() - 1);
    }
}

void WidgetHandle::mousePressEvent(QMouseEvent *e)
{
    e->accept();

    if (!m_formWindow->hasFeature(FormWindow::EditFeature))
        return;

    if (!(m_widget && e->button() == Qt::LeftButton))
        return;

    if (!(m_active || m_type == TaskMenu))
        return;

    QWidget *container = m_widget->parentWidget();

    m_origPressPos = container->mapFromGlobal(e->globalPos());
    m_geom = m_origGeom = m_widget->geometry();

    if (m_type == TaskMenu && e->button() == Qt::LeftButton) {
        Q_ASSERT(m_sel->taskMenuExtension());

        QMenu m(this);
        foreach (QAction *a, m_sel->taskMenuExtension()->taskActions()) {
            m.addAction(a);
        }
        m.exec(e->globalPos());
    }

}

void WidgetHandle::mouseMoveEvent(QMouseEvent *e)
{
    if (!(m_widget && m_active && e->buttons() & Qt::LeftButton))
        return;

    if (m_type == TaskMenu)
        return;

    e->accept();

    QWidget *container = m_widget->parentWidget();

    const QPoint rp = container->mapFromGlobal(e->globalPos());
    const QPoint d = rp - m_origPressPos;

    const QRect pr = container->rect();

    qdesigner_internal::Grid grid;
    if (const qdesigner_internal::FormWindowBase *fwb = qobject_cast<const qdesigner_internal::FormWindowBase*>(m_formWindow))
        grid = fwb->designerGrid();

    switch (m_type) {

    case TaskMenu:
        break;

    case LeftTop: {
        if (rp.x() > pr.width() - 2 * width() || rp.y() > pr.height() - 2 * height())
            return;

        int w = m_origGeom.width() - d.x();
        m_geom.setWidth(w);
        w = grid.widgetHandleAdjustX(w);

        int h = m_origGeom.height() - d.y();
        m_geom.setHeight(h);
        h = grid.widgetHandleAdjustY(h);

        const int dx = m_widget->width() - w;
        const int dy = m_widget->height() - h;

        trySetGeometry(m_widget, m_widget->x() + dx, m_widget->y() + dy, w, h);
    } break;

    case Top: {
        if (rp.y() > pr.height() - 2 * height())
            return;

        int h = m_origGeom.height() - d.y();
        m_geom.setHeight(h);
        h = grid.widgetHandleAdjustY(h);

        const int dy = m_widget->height() - h;
        trySetGeometry(m_widget, m_widget->x(), m_widget->y() + dy, m_widget->width(), h);
    } break;

    case RightTop: {
        if (rp.x() < 2 * width() || rp.y() > pr.height() - 2 * height())
            return;

        int h = m_origGeom.height() - d.y();
        m_geom.setHeight(h);
        h = grid.widgetHandleAdjustY(h);

        const int dy = m_widget->height() - h;

        int w = m_origGeom.width() + d.x();
        m_geom.setWidth(w);
        w = grid.widgetHandleAdjustX(w);

        trySetGeometry(m_widget, m_widget->x(), m_widget->y() + dy, w, h);
    } break;

    case Right: {
        if (rp.x() < 2 * width())
            return;

        int w = m_origGeom.width() + d.x();
        m_geom.setWidth(w);
        w = grid.widgetHandleAdjustX(w);

        tryResize(m_widget, w, m_widget->height());
    } break;

    case RightBottom: {
        if (rp.x() < 2 * width() || rp.y() < 2 * height())
            return;

        int w = m_origGeom.width() + d.x();
        m_geom.setWidth(w);
        w = grid.widgetHandleAdjustX(w);

        int h = m_origGeom.height() + d.y();
        m_geom.setHeight(h);
        h = grid.widgetHandleAdjustY(h);

        tryResize(m_widget, w, h);
    } break;

    case Bottom: {
        if (rp.y() < 2 * height())
            return;

        int h = m_origGeom.height() + d.y();
        m_geom.setHeight(h);
        h = grid.widgetHandleAdjustY(h);

        tryResize(m_widget, m_widget->width(), h);
    } break;

    case LeftBottom: {
        if (rp.x() > pr.width() - 2 * width() || rp.y() < 2 * height())
            return;

        int w = m_origGeom.width() - d.x();
        m_geom.setWidth(w);
        w = grid.widgetHandleAdjustX(w);

        int h = m_origGeom.height() + d.y();
        m_geom.setHeight(h);
        h = grid.widgetHandleAdjustY(h);

        int dx = m_widget->width() - w;

        trySetGeometry(m_widget, m_widget->x() + dx, m_widget->y(), w, h);
    } break;

    case Left: {
        if (rp.x() > pr.width() - 2 * width())
            return;

        int w = m_origGeom.width() - d.x();
        m_geom.setWidth(w);
        w = grid.widgetHandleAdjustX(w);

        const int dx = m_widget->width() - w;

        trySetGeometry(m_widget, m_widget->x() + dx, m_widget->y(), w, m_widget->height());
    } break;

    default: break;

    } // end switch

    m_sel->updateGeometry();

    if (LayoutInfo::layoutType(m_formWindow->core(), m_widget) != LayoutInfo::NoLayout)
        m_formWindow->updateChildSelections(m_widget);
}

void WidgetHandle::mouseReleaseEvent(QMouseEvent *e)
{
    if (e->button() != Qt::LeftButton || !m_active)
        return;