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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "formresizer.h"
#include "sizehandlerect.h"
#include "widgethostconstants.h"
#include <QDebug>
#include <QDesignerFormWindowInterface>
#include <QFrame>
#include <QPalette>
#include <QResizeEvent>
#include <QVBoxLayout>
enum { debugFormResizer = 0 };
using namespace SharedTools::Internal;
FormResizer::FormResizer(QWidget *parent) :
QWidget(parent),
m_frame(new QFrame)
{
// Make the resize grip of a mainwindow form find us as resizable window.
setWindowFlags(windowFlags() | Qt::SubWindow);
setBackgroundRole(QPalette::Base);
auto handleLayout = new QVBoxLayout(this);
handleLayout->setContentsMargins(SELECTION_MARGIN, SELECTION_MARGIN,
SELECTION_MARGIN, SELECTION_MARGIN);
handleLayout->addWidget(m_frame);
m_frame->setFrameStyle(QFrame::Panel | QFrame::Raised);
QVBoxLayout *layout = new QVBoxLayout(m_frame);
layout->setContentsMargins(0, 0, 0, 0);
// handles
m_handles.reserve(SizeHandleRect::Left);
for (int i = SizeHandleRect::LeftTop; i <= SizeHandleRect::Left; ++i) {
SizeHandleRect *shr = new SizeHandleRect(this, static_cast<SizeHandleRect::Direction>(i), this);
connect(shr, &SizeHandleRect::mouseButtonReleased, this, &FormResizer::formWindowSizeChanged);
m_handles.push_back(shr);
}
setState(SelectionHandleActive);
updateGeometry();
}
void FormResizer::updateGeometry()
{
const QRect &geom = m_frame->geometry();
if (debugFormResizer)
qDebug() << "FormResizer::updateGeometry() " << size() << " frame " << geom;
const int w = SELECTION_HANDLE_SIZE;
const int h = SELECTION_HANDLE_SIZE;
const Handles::iterator hend = m_handles.end();
for (Handles::iterator it = m_handles.begin(); it != hend; ++it) {
SizeHandleRect *hndl = *it;
switch (hndl->dir()) {
case SizeHandleRect::LeftTop:
hndl->move(geom.x() - w / 2, geom.y() - h / 2);
break;
case SizeHandleRect::Top:
hndl->move(geom.x() + geom.width() / 2 - w / 2, geom.y() - h / 2);
break;
case SizeHandleRect::RightTop:
hndl->move(geom.x() + geom.width() - w / 2, geom.y() - h / 2);
break;
case SizeHandleRect::Right:
hndl->move(geom.x() + geom.width() - w / 2, geom.y() + geom.height() / 2 - h / 2);
break;
case SizeHandleRect::RightBottom:
hndl->move(geom.x() + geom.width() - w / 2, geom.y() + geom.height() - h / 2);
break;
case SizeHandleRect::Bottom:
hndl->move(geom.x() + geom.width() / 2 - w / 2, geom.y() + geom.height() - h / 2);
break;
case SizeHandleRect::LeftBottom:
hndl->move(geom.x() - w / 2, geom.y() + geom.height() - h / 2);
break;
case SizeHandleRect::Left:
hndl->move(geom.x() - w / 2, geom.y() + geom.height() / 2 - h / 2);
break;
default:
break;
}
}
}
void FormResizer::update()
{
const Handles::iterator hend = m_handles.end();
for (Handles::iterator it = m_handles.begin(); it != hend; ++it) {
(*it)->update();
}
}
void FormResizer::setState(SelectionHandleState st)
{
if (debugFormResizer)
qDebug() << "FormResizer::setState " << st;
const Handles::iterator hend = m_handles.end();
for (Handles::iterator it = m_handles.begin(); it != hend; ++it)
(*it)->setState(st);
}
void FormResizer::setFormWindow(QDesignerFormWindowInterface *fw)
{
if (debugFormResizer)
qDebug() << "FormResizer::setFormWindow " << fw;
QVBoxLayout *layout = qobject_cast<QVBoxLayout *>(m_frame->layout());
Q_ASSERT(layout);
if (layout->count())
delete layout->takeAt(0);
m_formWindow = fw;
if (m_formWindow)
layout->addWidget(m_formWindow);
mainContainerChanged();
connect(fw, &QDesignerFormWindowInterface::mainContainerChanged, this, &FormResizer::mainContainerChanged);
}
void FormResizer::resizeEvent(QResizeEvent *event)
{
if (debugFormResizer)
qDebug() << ">FormResizer::resizeEvent" << event->size();
updateGeometry();
QWidget::resizeEvent(event);
if (debugFormResizer)
qDebug() << "<FormResizer::resizeEvent";
}
QSize FormResizer::decorationSize() const
{
const int margin = 2 * SELECTION_MARGIN + 2 * m_frame->lineWidth();
return QSize(margin, margin);
}
QWidget *FormResizer::mainContainer()
{
if (m_formWindow)
return m_formWindow->mainContainer();
return nullptr;
}
void FormResizer::mainContainerChanged()
{
const QSize maxWidgetSize = QSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
if (const QWidget *mc = mainContainer()) {
// Set Maximum size which is not handled via a hint (as opposed to minimum size)
const QSize maxWidgetSize = QSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
const QSize formMaxSize = mc->maximumSize();
QSize newMaxSize = maxWidgetSize;
if (formMaxSize != maxWidgetSize)
newMaxSize = formMaxSize + decorationSize();
if (debugFormResizer)
qDebug() << "FormResizer::mainContainerChanged" << mc << " Size " << mc->size()<< newMaxSize;
setMaximumSize(newMaxSize);
resize(decorationSize() + mc->size());
} else {
setMaximumSize(maxWidgetSize);
}
}
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