diff options
Diffstat (limited to 'tools/designer/src/lib/shared/layoutinfo.cpp')
| -rw-r--r-- | tools/designer/src/lib/shared/layoutinfo.cpp | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/tools/designer/src/lib/shared/layoutinfo.cpp b/tools/designer/src/lib/shared/layoutinfo.cpp new file mode 100644 index 0000000..01eb43a --- /dev/null +++ b/tools/designer/src/lib/shared/layoutinfo.cpp @@ -0,0 +1,312 @@ +/**************************************************************************** +** +** 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 "layoutinfo_p.h" + +#include <QtDesigner/QDesignerFormEditorInterface> +#include <QtDesigner/QDesignerContainerExtension> +#include <QtDesigner/QDesignerMetaDataBaseInterface> +#include <QtDesigner/QExtensionManager> + +#include <QtGui/QHBoxLayout> +#include <QtGui/QFormLayout> +#include <QtGui/QSplitter> +#include <QtCore/QDebug> +#include <QtCore/QHash> +#include <QtCore/QRect> + +QT_BEGIN_NAMESPACE + +namespace qdesigner_internal { +/*! + \overload +*/ +LayoutInfo::Type LayoutInfo::layoutType(const QDesignerFormEditorInterface *core, const QLayout *layout) +{ + Q_UNUSED(core) + if (!layout) + return NoLayout; + else if (qobject_cast<const QHBoxLayout*>(layout)) + return HBox; + else if (qobject_cast<const QVBoxLayout*>(layout)) + return VBox; + else if (qobject_cast<const QGridLayout*>(layout)) + return Grid; + else if (qobject_cast<const QFormLayout*>(layout)) + return Form; + return UnknownLayout; +} + +static const QHash<QString, LayoutInfo::Type> &layoutNameTypeMap() +{ + static QHash<QString, LayoutInfo::Type> nameTypeMap; + if (nameTypeMap.empty()) { + nameTypeMap.insert(QLatin1String("QVBoxLayout"), LayoutInfo::VBox); + nameTypeMap.insert(QLatin1String("QHBoxLayout"), LayoutInfo::HBox); + nameTypeMap.insert(QLatin1String("QGridLayout"), LayoutInfo::Grid); + nameTypeMap.insert(QLatin1String("QFormLayout"), LayoutInfo::Form); + } + return nameTypeMap; +} + +LayoutInfo::Type LayoutInfo::layoutType(const QString &typeName) +{ + return layoutNameTypeMap().value(typeName, NoLayout); +} + +QString LayoutInfo::layoutName(Type t) +{ + return layoutNameTypeMap().key(t); +} + +/*! + \overload +*/ +LayoutInfo::Type LayoutInfo::layoutType(const QDesignerFormEditorInterface *core, const QWidget *w) +{ + if (const QSplitter *splitter = qobject_cast<const QSplitter *>(w)) + return splitter->orientation() == Qt::Horizontal ? HSplitter : VSplitter; + return layoutType(core, w->layout()); +} + +LayoutInfo::Type LayoutInfo::managedLayoutType(const QDesignerFormEditorInterface *core, + const QWidget *w, + QLayout **ptrToLayout) +{ + if (ptrToLayout) + *ptrToLayout = 0; + if (const QSplitter *splitter = qobject_cast<const QSplitter *>(w)) + return splitter->orientation() == Qt::Horizontal ? HSplitter : VSplitter; + QLayout *layout = managedLayout(core, w); + if (!layout) + return NoLayout; + if (ptrToLayout) + *ptrToLayout = layout; + return layoutType(core, layout); +} + +QWidget *LayoutInfo::layoutParent(const QDesignerFormEditorInterface *core, QLayout *layout) +{ + Q_UNUSED(core) + + QObject *o = layout; + while (o) { + if (QWidget *widget = qobject_cast<QWidget*>(o)) + return widget; + + o = o->parent(); + } + return 0; +} + +void LayoutInfo::deleteLayout(const QDesignerFormEditorInterface *core, QWidget *widget) +{ + if (QDesignerContainerExtension *container = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), widget)) + widget = container->widget(container->currentIndex()); + + Q_ASSERT(widget != 0); + + QLayout *layout = managedLayout(core, widget); + + if (layout == 0 || core->metaDataBase()->item(layout) != 0) { + delete layout; + widget->updateGeometry(); + return; + } + + qDebug() << "trying to delete an unmanaged layout:" << "widget:" << widget << "layout:" << layout; +} + +LayoutInfo::Type LayoutInfo::laidoutWidgetType(const QDesignerFormEditorInterface *core, + QWidget *widget, + bool *isManaged, + QLayout **ptrToLayout) +{ + if (isManaged) + *isManaged = false; + if (ptrToLayout) + *ptrToLayout = 0; + + QWidget *parent = widget->parentWidget(); + if (!parent) + return NoLayout; + + // 1) Splitter + if (QSplitter *splitter = qobject_cast<QSplitter*>(parent)) { + if (isManaged) + *isManaged = core->metaDataBase()->item(splitter); + return splitter->orientation() == Qt::Horizontal ? HSplitter : VSplitter; + } + + // 2) Layout of parent + QLayout *parentLayout = parent->layout(); + if (!parentLayout) + return NoLayout; + + if (parentLayout->indexOf(widget) != -1) { + if (isManaged) + *isManaged = core->metaDataBase()->item(parentLayout); + if (ptrToLayout) + *ptrToLayout = parentLayout; + return layoutType(core, parentLayout); + } + + // 3) Some child layout (see below comment about Q3GroupBox) + const QList<QLayout*> childLayouts = qFindChildren<QLayout*>(parentLayout); + if (childLayouts.empty()) + return NoLayout; + const QList<QLayout*>::const_iterator lcend = childLayouts.constEnd(); + for (QList<QLayout*>::const_iterator it = childLayouts.constBegin(); it != lcend; ++it) { + QLayout *layout = *it; + if (layout->indexOf(widget) != -1) { + if (isManaged) + *isManaged = core->metaDataBase()->item(layout); + if (ptrToLayout) + *ptrToLayout = layout; + return layoutType(core, layout); + } + } + + return NoLayout; +} + +QLayout *LayoutInfo::internalLayout(const QWidget *widget) +{ + QLayout *widgetLayout = widget->layout(); + if (widgetLayout && widget->inherits("Q3GroupBox")) { + if (widgetLayout->count()) { + widgetLayout = widgetLayout->itemAt(0)->layout(); + } else { + widgetLayout = 0; + } + } + return widgetLayout; +} + + +QLayout *LayoutInfo::managedLayout(const QDesignerFormEditorInterface *core, const QWidget *widget) +{ + if (widget == 0) + return 0; + + QLayout *layout = widget->layout(); + if (!layout) + return 0; + + return managedLayout(core, layout); +} + +QLayout *LayoutInfo::managedLayout(const QDesignerFormEditorInterface *core, QLayout *layout) +{ + QDesignerMetaDataBaseInterface *metaDataBase = core->metaDataBase(); + + if (!metaDataBase) + return layout; + /* This code exists mainly for the Q3GroupBox class, for which + * widget->layout() returns an internal VBoxLayout. */ + const QDesignerMetaDataBaseItemInterface *item = metaDataBase->item(layout); + if (item == 0) { + layout = qFindChild<QLayout*>(layout); + item = metaDataBase->item(layout); + } + if (!item) + return 0; + return layout; +} + +// Is it a a dummy grid placeholder created by Designer? +bool LayoutInfo::isEmptyItem(QLayoutItem *item) +{ + if (item == 0) { + qDebug() << "** WARNING Zero-item passed on to isEmptyItem(). This indicates a layout inconsistency."; + return true; + } + return item->spacerItem() != 0; +} + +QDESIGNER_SHARED_EXPORT void getFormLayoutItemPosition(const QFormLayout *formLayout, int index, int *rowPtr, int *columnPtr, int *rowspanPtr, int *colspanPtr) +{ + int row; + QFormLayout::ItemRole role; + formLayout->getItemPosition(index, &row, &role); + const int columnspan = role == QFormLayout::SpanningRole ? 2 : 1; + const int column = (columnspan > 1 || role == QFormLayout::LabelRole) ? 0 : 1; + if (rowPtr) + *rowPtr = row; + if (columnPtr) + *columnPtr = column; + if (rowspanPtr) + *rowspanPtr = 1; + if (colspanPtr) + *colspanPtr = columnspan; +} + +static inline QFormLayout::ItemRole formLayoutRole(int column, int colspan) +{ + if (colspan > 1) + return QFormLayout::SpanningRole; + return column == 0 ? QFormLayout::LabelRole : QFormLayout::FieldRole; +} + +QDESIGNER_SHARED_EXPORT void formLayoutAddWidget(QFormLayout *formLayout, QWidget *w, const QRect &r, bool insert) +{ + // Consistent API galore... + if (insert) { + const bool spanning = r.width() > 1; + if (spanning) { + formLayout->insertRow(r.y(), w); + } else { + QWidget *label = 0, *field = 0; + if (r.x() == 0) { + label = w; + } else { + field = w; + } + formLayout->insertRow(r.y(), label, field); + } + } else { + formLayout->setWidget(r.y(), formLayoutRole(r.x(), r.width()), w); + } +} + +} // namespace qdesigner_internal + +QT_END_NAMESPACE |