Long live Qt 4.5!

1 files changed, 280 insertions, 0 deletions

diff --git a/tools/designer/src/lib/shared/spacer_widget.cpp b/tools/designer/src/lib/shared/spacer_widget.cpp
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+++ b/tools/designer/src/lib/shared/spacer_widget.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "spacer_widget_p.h"
+#include "layoutinfo_p.h"
+
+#include <QtDesigner/abstractformwindow.h>
+#include <QtDesigner/QDesignerFormWindowInterface>
+#include <QtDesigner/QDesignerFormEditorInterface>
+#include <QtDesigner/QDesignerPropertySheetExtension>
+#include <QtDesigner/QExtensionManager>
+
+#include <QtGui/QLayout>
+#include <QtGui/QPainter>
+#include <QtGui/qevent.h>
+#include <QtCore/qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+// The Spacer widget is Designer representation of  QLayoutItem.
+// It uses QLayoutItem's sizeHint property as QWidget
+// sizeHint and the QLayoutItem's sizeType property as QWidget size policy.
+// If it is not within a layout, it adds a margin (m_SizeOffset) around it
+// to avoid being shrunk to an invisible state when the sizeHint is reset to 0,0
+// and enables sizeHandle-resizing. In a layout, however, this m_SizeOffset
+// should not be applied for  pixel-exact design.
+
+Spacer::Spacer(QWidget *parent) :
+    QWidget(parent),
+    m_SizeOffset(3, 3), // A small offset to ensure the spacer is still visible when reset to size 0,0
+    m_orientation(Qt::Vertical),
+    m_interactive(true),
+    m_layoutState(UnknownLayoutState),
+    m_sizeHint(0, 0)
+{
+    setAttribute(Qt::WA_MouseNoMask);
+    m_formWindow = QDesignerFormWindowInterface::findFormWindow(this);
+    setSizeType(QSizePolicy::Expanding);
+}
+
+bool Spacer::event(QEvent *e)
+{
+    switch (e->type()) {
+    case QEvent::ToolTip:
+        updateToolTip(); // Tooltip includes size, so, refresh on demand
+        break;
+    case QEvent::ParentChange: // Cache information about 'being in layout' which is expensive to calculate.
+        m_layoutState = UnknownLayoutState;
+        break;
+    default:
+        break;
+    }
+    return QWidget::event(e);
+}
+
+bool Spacer::isInLayout() const
+{
+    if (m_layoutState == UnknownLayoutState) {
+        m_layoutState = OutsideLayout;
+        if (m_formWindow)
+            if (const QWidget *parent = parentWidget())
+                if (qdesigner_internal::LayoutInfo::managedLayoutType(m_formWindow->core(), parent) != qdesigner_internal::LayoutInfo::NoLayout)
+                    m_layoutState = InLayout;
+    }
+    return m_layoutState == InLayout;
+}
+
+void Spacer::paintEvent(QPaintEvent *)
+{
+    // Only draw spacers when we're editting widgets
+    if (m_formWindow != 0 && m_formWindow->currentTool() != 0)
+        return;
+
+    QPainter p(this);
+    p.setPen(Qt::blue);
+    const int w = width();
+    const int h = height();
+    if (w * h == 0)
+        return;
+
+    if (w <= m_SizeOffset.width() || h <= m_SizeOffset.height()) {
+        const int lw = w - 1;
+        const int lh = h - 1;
+        switch (m_orientation) {
+        case Qt::Horizontal:
+            p.drawLine(0,  0, 0,  lh);
+            p.drawLine(lw, 0, lw, lh);
+            break;
+        case Qt::Vertical:
+            p.drawLine(0, 0,  lw, 0);
+            p.drawLine(0, lh, lw, lh);
+            break;
+        }
+        return;
+    }
+    if (m_orientation == Qt::Horizontal) {
+        const int dist = 3;
+        const int amplitude = qMin(3, h / 3);
+        const int base = h / 2;
+        int i = 0;
+        p.setPen(Qt::white);
+        for (i = 0; i < w / 3 +2; ++i)
+            p.drawLine(i * dist, base - amplitude, i * dist + dist / 2, base + amplitude);
+        p.setPen(Qt::blue);
+        for (i = 0; i < w / 3 +2; ++i)
+            p.drawLine(i * dist + dist / 2, base + amplitude, i * dist + dist, base - amplitude);
+        const int y = h/2;
+        p.drawLine(0, y-10, 0, y+10);
+        p.drawLine(w - 1, y-10, w - 1, y+10);
+    } else {
+        const int dist = 3;
+        const int amplitude = qMin(3, w / 3);
+        const int base = w / 2;
+        int i = 0;
+        p.setPen(Qt::white);
+        for (i = 0; i < h / 3 +2; ++i)
+            p.drawLine(base - amplitude, i * dist, base + amplitude,i * dist + dist / 2);
+        p.setPen(Qt::blue);
+        for (i = 0; i < h / 3 +2; ++i)
+            p.drawLine(base + amplitude, i * dist + dist / 2, base - amplitude, i * dist + dist);
+        const int x = w/2;
+        p.drawLine(x-10, 0, x+10, 0);
+        p.drawLine(x-10, h - 1, x+10, h - 1);
+    }
+}
+
+void Spacer::resizeEvent(QResizeEvent* e)
+{
+    QWidget::resizeEvent(e);
+    // When resized by widget handle dragging after a reset (QSize(0, 0)):
+    // Mark the property as changed (geometry and sizeHint are in sync except for 'changed').
+    if (m_formWindow) {
+        const QSize oldSize = e->oldSize();
+        if (oldSize.isNull() || oldSize.width() <= m_SizeOffset.width() || oldSize.height() <= m_SizeOffset.height())
+            if (QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(m_formWindow->core()->extensionManager(), this))
+                sheet->setChanged(sheet->indexOf(QLatin1String("sizeHint")), true);
+    }
+
+    updateMask();
+
+    if (!m_interactive)
+        return;
+
+    if (!isInLayout()) { // Allow size-handle resize only if not in layout
+        const QSize currentSize = size();
+        if (currentSize.width() >= m_SizeOffset.width() && currentSize.height() >= m_SizeOffset.height())
+            m_sizeHint = currentSize - m_SizeOffset;
+    }
+}
+
+void Spacer::updateMask()
+{
+    QRegion r(rect());
+    const int w = width();
+    const int h = height();
+    if (w > 1 && h > 1) {
+        if (m_orientation == Qt::Horizontal) {
+            const int amplitude = qMin(3, h / 3);
+            const int base = h / 2;
+            r = r.subtract(QRect(1, 0, w - 2, base - amplitude));
+            r = r.subtract(QRect(1, base + amplitude, w - 2, h - base - amplitude));
+        } else {
+            const int amplitude = qMin(3, w / 3);
+            const int base = w / 2;
+            r = r.subtract(QRect(0, 1, base - amplitude, h - 2));
+            r = r.subtract(QRect(base + amplitude, 1, w - base - amplitude, h - 2));
+        }
+    }
+    setMask(r);
+}
+
+void Spacer::setSizeType(QSizePolicy::Policy t)
+{
+    const QSizePolicy sizeP = m_orientation == Qt::Vertical ? QSizePolicy(QSizePolicy::Minimum, t) : QSizePolicy(t, QSizePolicy::Minimum);
+    setSizePolicy(sizeP);
+}
+
+
+QSizePolicy::Policy Spacer::sizeType() const
+{
+    return m_orientation == Qt::Vertical ? sizePolicy().verticalPolicy() : sizePolicy().horizontalPolicy();
+}
+
+Qt::Alignment Spacer::alignment() const
+{
+    // For grid layouts
+    return m_orientation == Qt::Vertical ?  Qt::AlignHCenter : Qt::AlignVCenter;
+}
+
+QSize Spacer::sizeHint() const
+{
+    return isInLayout() ? m_sizeHint : m_sizeHint + m_SizeOffset;
+}
+
+QSize Spacer::sizeHintProperty() const
+{
+    return m_sizeHint;
+}
+
+void Spacer::setSizeHintProperty(const QSize &s)
+{
+    m_sizeHint = s;
+
+    if (!isInLayout()) // Visible resize only if not in layout
+        resize(s + m_SizeOffset);
+
+    updateGeometry();
+}
+
+Qt::Orientation Spacer::orientation() const
+{
+    return m_orientation;
+}
+
+void Spacer::setOrientation(Qt::Orientation o)
+{
+    if (m_orientation == o)
+        return;
+
+    const QSizePolicy::Policy st = sizeType(); // flip size type
+    m_orientation = o;
+    setSizeType(st);
+
+    if (m_interactive) {
+        m_sizeHint = QSize(m_sizeHint.height(), m_sizeHint.width());
+        if (!isInLayout())
+            resize(m_sizeHint + m_SizeOffset);
+    }
+
+    updateMask();
+    update();
+    updateGeometry();
+}
+
+void Spacer::updateToolTip()
+{
+    const QString format = m_orientation == Qt::Horizontal ? tr("Horizontal Spacer '%1', %2 x %3") : tr("Vertical Spacer '%1', %2 x %3");
+    QString msg = format.arg(objectName()).arg(m_sizeHint.width()).arg(m_sizeHint.height());
+    setToolTip(msg);
+}
+
+QT_END_NAMESPACE