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Diffstat (limited to 'tools/designer/src/lib/shared/layout.cpp')
| -rw-r--r-- | tools/designer/src/lib/shared/layout.cpp | 1326 |
1 files changed, 1326 insertions, 0 deletions
diff --git a/tools/designer/src/lib/shared/layout.cpp b/tools/designer/src/lib/shared/layout.cpp new file mode 100644 index 0000000..b1fe02a --- /dev/null +++ b/tools/designer/src/lib/shared/layout.cpp @@ -0,0 +1,1326 @@ +/**************************************************************************** +** +** 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 "layout_p.h" +#include "qdesigner_utils_p.h" +#include "qlayout_widget_p.h" +#include "spacer_widget_p.h" +#include "layoutdecoration.h" +#include "widgetfactory_p.h" +#include "qdesigner_widgetitem_p.h" + +#include <QtDesigner/QDesignerFormEditorInterface> +#include <QtDesigner/QDesignerFormWindowInterface> +#include <QtDesigner/QDesignerContainerExtension> +#include <QtDesigner/QExtensionManager> +#include <QtDesigner/QDesignerPropertySheetExtension> +#include <QtDesigner/QDesignerWidgetDataBaseInterface> +#include <QtDesigner/QDesignerMetaDataBaseInterface> + +#include <QtCore/qdebug.h> +#include <QtCore/QVector> + +#include <QtGui/qevent.h> +#include <QtGui/QGridLayout> +#include <QtGui/QPainter> +#include <QtGui/QBitmap> +#include <QtGui/QSplitter> +#include <QtGui/QMainWindow> +#include <QtGui/QApplication> +#include <QtGui/QScrollArea> +#include <QtGui/QFormLayout> +#include <QtGui/QLabel> +#include <QtGui/QWizardPage> +#include <QtGui/QWizard> +#include <QtCore/QDebug> +#include <QtCore/QSet> + +QT_BEGIN_NAMESPACE + +enum { FormLayoutColumns = 2 }; + +namespace qdesigner_internal { + +/* The wizard has a policy of setting a size policy of its external children + * according to the page being expanding or not (in the latter case, the + * page will be pushed to the top). When setting/breaking layouts, this needs + * to be updated, which happens via a fake style change event. */ + +void updateWizardLayout(QWidget *layoutBase); + +class FriendlyWizardPage : public QWizardPage { + friend void updateWizardLayout(QWidget *); +}; + +void updateWizardLayout(QWidget *layoutBase) +{ + if (QWizardPage *wizardPage = qobject_cast<QWizardPage*>(layoutBase)) + if (QWizard *wizard = static_cast<FriendlyWizardPage*>(wizardPage)->wizard()) { + QEvent event(QEvent::StyleChange); + QApplication::sendEvent(wizard, &event); + } +} + +/*! + \class Layout layout.h + \brief Baseclass for layouting widgets in the Designer (Helper for Layout commands) + \internal + + Classes derived from this abstract base class are used for layouting + operations in the Designer (creating/breaking layouts). + + Instances live in the Layout/BreakLayout commands. +*/ + +/*! \a p specifies the parent of the layoutBase \a lb. The parent + might be changed in setup(). If the layoutBase is a + container, the parent and the layoutBase are the same. Also they + always have to be a widget known to the designer (e.g. in the case + of the tabwidget parent and layoutBase are the tabwidget and not the + page which actually gets laid out. For actual usage the correct + widget is found later by Layout.) + */ + +Layout::Layout(const QWidgetList &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb, LayoutInfo::Type layoutType) : + m_widgets(wl), + m_parentWidget(p), + m_layoutBase(lb), + m_formWindow(fw), + m_layoutType(layoutType), + m_reparentLayoutWidget(true), + m_isBreak(false) +{ + if (m_layoutBase) + m_oldGeometry = m_layoutBase->geometry(); +} + +Layout::~Layout() +{ +} + +/*! The widget list we got in the constructor might contain too much + widgets (like widgets with different parents, already laid out + widgets, etc.). Here we set up the list and so the only the "best" + widgets get laid out. +*/ + +void Layout::setup() +{ + m_startPoint = QPoint(32767, 32767); + + // Go through all widgets of the list we got. As we can only + // layout widgets which have the same parent, we first do some + // sorting which means create a list for each parent containing + // its child here. After that we keep working on the list of + // children which has the most entries. + // Widgets which are already laid out are thrown away here too + + QMultiMap<QWidget*, QWidget*> lists; + foreach (QWidget *w, m_widgets) { + QWidget *p = w->parentWidget(); + + if (p && LayoutInfo::layoutType(m_formWindow->core(), p) != LayoutInfo::NoLayout + && m_formWindow->core()->metaDataBase()->item(p->layout()) != 0) + continue; + + lists.insert(p, w); + } + + QWidgetList lastList; + QWidgetList parents = lists.keys(); + foreach (QWidget *p, parents) { + QWidgetList children = lists.values(p); + + if (children.count() > lastList.count()) + lastList = children; + } + + + // If we found no list (because no widget did fit at all) or the + // best list has only one entry and we do not layout a container, + // we leave here. + QDesignerWidgetDataBaseInterface *widgetDataBase = m_formWindow->core()->widgetDataBase(); + if (lastList.count() < 2 && + (!m_layoutBase || + (!widgetDataBase->isContainer(m_layoutBase, false) && + m_layoutBase != m_formWindow->mainContainer())) + ) { + m_widgets.clear(); + m_startPoint = QPoint(0, 0); + return; + } + + // Now we have a new and clean widget list, which makes sense + // to layout + m_widgets = lastList; + // Also use the only correct parent later, so store it + + Q_ASSERT(m_widgets.isEmpty() == false); + + m_parentWidget = m_formWindow->core()->widgetFactory()->widgetOfContainer(m_widgets.first()->parentWidget()); + // Now calculate the position where the layout-meta-widget should + // be placed and connect to widgetDestroyed() signals of the + // widgets to get informed if one gets deleted to be able to + // handle that and do not crash in this case + foreach (QWidget *w, m_widgets) { + connect(w, SIGNAL(destroyed()), this, SLOT(widgetDestroyed())); + m_startPoint = QPoint(qMin(m_startPoint.x(), w->x()), qMin(m_startPoint.y(), w->y())); + const QRect rc(w->geometry()); + + m_geometries.insert(w, rc); + // Change the Z-order, as saving/loading uses the Z-order for + // writing/creating widgets and this has to be the same as in + // the layout. Else saving + loading will give different results + w->raise(); + } + + sort(); +} + +void Layout::widgetDestroyed() +{ + if (QWidget *w = qobject_cast<QWidget *>(sender())) { + m_widgets.removeAt(m_widgets.indexOf(w)); + m_geometries.remove(w); + } +} + +bool Layout::prepareLayout(bool &needMove, bool &needReparent) +{ + foreach (QWidget *widget, m_widgets) { + widget->raise(); + } + + needMove = !m_layoutBase; + needReparent = needMove || (m_reparentLayoutWidget && qobject_cast<QLayoutWidget*>(m_layoutBase)) || qobject_cast<QSplitter*>(m_layoutBase); + + QDesignerWidgetFactoryInterface *widgetFactory = m_formWindow->core()->widgetFactory(); + QDesignerMetaDataBaseInterface *metaDataBase = m_formWindow->core()->metaDataBase(); + + if (m_layoutBase == 0) { + const bool useSplitter = m_layoutType == LayoutInfo::HSplitter || m_layoutType == LayoutInfo::VSplitter; + const QString baseWidgetClassName = useSplitter ? QLatin1String("QSplitter") : QLatin1String("QLayoutWidget"); + m_layoutBase = widgetFactory->createWidget(baseWidgetClassName, widgetFactory->containerOfWidget(m_parentWidget)); + if (useSplitter) { + m_layoutBase->setObjectName(QLatin1String("splitter")); + m_formWindow->ensureUniqueObjectName(m_layoutBase); + } + } else { + LayoutInfo::deleteLayout(m_formWindow->core(), m_layoutBase); + } + + metaDataBase->add(m_layoutBase); + + Q_ASSERT(m_layoutBase->layout() == 0 || metaDataBase->item(m_layoutBase->layout()) == 0); + + return true; +} + +static bool isMainContainer(QDesignerFormWindowInterface *fw, const QWidget *w) +{ + return w && (w == fw || w == fw->mainContainer()); +} + +static bool isPageOfContainerWidget(QDesignerFormWindowInterface *fw, QWidget *widget) +{ + QDesignerContainerExtension *c = qt_extension<QDesignerContainerExtension*>( + fw->core()->extensionManager(), widget->parentWidget()); + + if (c != 0) { + for (int i = 0; i<c->count(); ++i) { + if (widget == c->widget(i)) + return true; + } + } + + return false; +} +void Layout::finishLayout(bool needMove, QLayout *layout) +{ + if (m_parentWidget == m_layoutBase) { + QWidget *widget = m_layoutBase; + m_oldGeometry = widget->geometry(); + + bool done = false; + while (!isMainContainer(m_formWindow, widget) && !done) { + if (!m_formWindow->isManaged(widget)) { + widget = widget->parentWidget(); + continue; + } else if (LayoutInfo::isWidgetLaidout(m_formWindow->core(), widget)) { + widget = widget->parentWidget(); + continue; + } else if (isPageOfContainerWidget(m_formWindow, widget)) { + widget = widget->parentWidget(); + continue; + } else if (widget->parentWidget()) { + QScrollArea *area = qobject_cast<QScrollArea*>(widget->parentWidget()->parentWidget()); + if (area && area->widget() == widget) { + widget = area; + continue; + } + } + + done = true; + } + updateWizardLayout(m_layoutBase); + QApplication::processEvents(QEventLoop::ExcludeUserInputEvents); + // We don't want to resize the form window + if (!Utils::isCentralWidget(m_formWindow, widget)) + widget->adjustSize(); + + return; + } + + if (needMove) + m_layoutBase->move(m_startPoint); + + const QRect g(m_layoutBase->pos(), m_layoutBase->size()); + + if (LayoutInfo::layoutType(m_formWindow->core(), m_layoutBase->parentWidget()) == LayoutInfo::NoLayout && !m_isBreak) + m_layoutBase->adjustSize(); + else if (m_isBreak) + m_layoutBase->setGeometry(m_oldGeometry); + + m_oldGeometry = g; + if (layout) + layout->invalidate(); + m_layoutBase->show(); + + if (qobject_cast<QLayoutWidget*>(m_layoutBase) || qobject_cast<QSplitter*>(m_layoutBase)) { + m_formWindow->clearSelection(false); + m_formWindow->manageWidget(m_layoutBase); + m_formWindow->selectWidget(m_layoutBase); + } +} + +void Layout::undoLayout() +{ + if (!m_widgets.count()) + return; + + m_formWindow->selectWidget(m_layoutBase, false); + + QDesignerWidgetFactoryInterface *widgetFactory = m_formWindow->core()->widgetFactory(); + QHashIterator<QWidget *, QRect> it(m_geometries); + while (it.hasNext()) { + it.next(); + + if (!it.key()) + continue; + + QWidget* w = it.key(); + const QRect rc = it.value(); + + const bool showIt = w->isVisibleTo(m_formWindow); + QWidget *container = widgetFactory->containerOfWidget(m_parentWidget); + + // ### remove widget here + QWidget *parentWidget = w->parentWidget(); + QDesignerFormEditorInterface *core = m_formWindow->core(); + QDesignerLayoutDecorationExtension *deco = qt_extension<QDesignerLayoutDecorationExtension*>(core->extensionManager(), parentWidget); + + if (deco) + deco->removeWidget(w); + + w->setParent(container); + w->setGeometry(rc); + + if (showIt) + w->show(); + } + + LayoutInfo::deleteLayout(m_formWindow->core(), m_layoutBase); + + if (m_parentWidget != m_layoutBase && !qobject_cast<QMainWindow*>(m_layoutBase)) { + m_formWindow->unmanageWidget(m_layoutBase); + m_layoutBase->hide(); + } else { + QMainWindow *mw = qobject_cast<QMainWindow*>(m_formWindow->mainContainer()); + if (m_layoutBase != m_formWindow->mainContainer() && + (!mw || mw->centralWidget() != m_layoutBase)) + m_layoutBase->setGeometry(m_oldGeometry); + } +} + +void Layout::breakLayout() +{ + typedef QMap<QWidget *, QRect> WidgetRectMap; + WidgetRectMap rects; + /* Store the geometry of the widgets. The idea is to give the user space + * to rearrange them, so, we do a adjustSize() on them, unless they want + * to grow (expanding widgets like QTextEdit), in which the geometry is + * preserved. Note that historically, geometries were re-applied + * only after breaking splitters. */ + foreach (QWidget *w, m_widgets) { + const QRect geom = w->geometry(); + const QSize sizeHint = w->sizeHint(); + const bool restoreGeometry = sizeHint.isEmpty() || sizeHint.width() > geom.width() || sizeHint.height() > geom.height(); + rects.insert(w, restoreGeometry ? w->geometry() : QRect(geom.topLeft(), QSize())); + } + const QPoint m_layoutBasePos = m_layoutBase->pos(); + QDesignerWidgetDataBaseInterface *widgetDataBase = m_formWindow->core()->widgetDataBase(); + + LayoutInfo::deleteLayout(m_formWindow->core(), m_layoutBase); + + const bool needReparent = (m_reparentLayoutWidget && qobject_cast<QLayoutWidget*>(m_layoutBase)) || + qobject_cast<QSplitter*>(m_layoutBase) || + (!widgetDataBase->isContainer(m_layoutBase, false) && + m_layoutBase != m_formWindow->mainContainer()); + const bool add = m_geometries.isEmpty(); + + QMapIterator<QWidget*, QRect> it(rects); + while (it.hasNext()) { + it.next(); + + QWidget *w = it.key(); + if (needReparent) { + w->setParent(m_layoutBase->parentWidget(), 0); + w->move(m_layoutBasePos + it.value().topLeft()); + w->show(); + } + + const QRect oldGeometry = it.value(); + if (oldGeometry.isEmpty()) { + w->adjustSize(); + } else { + w->resize(oldGeometry.size()); + } + + if (add) + m_geometries.insert(w, QRect(w->pos(), w->size())); + } + + if (needReparent) { + m_layoutBase->hide(); + m_parentWidget = m_layoutBase->parentWidget(); + m_formWindow->unmanageWidget(m_layoutBase); + } else { + m_parentWidget = m_layoutBase; + } + updateWizardLayout(m_layoutBase); + + if (!m_widgets.isEmpty() && m_widgets.first() && m_widgets.first()->isVisibleTo(m_formWindow)) + m_formWindow->selectWidget(m_widgets.first()); + else + m_formWindow->selectWidget(m_formWindow); +} + +static QString suggestLayoutName(const char *className) +{ + // Legacy + if (!qstrcmp(className, "QHBoxLayout")) + return QLatin1String("horizontalLayout"); + if (!qstrcmp(className, "QVBoxLayout")) + return QLatin1String("verticalLayout"); + if (!qstrcmp(className, "QGridLayout")) + return QLatin1String("gridLayout"); + + return qtify(QString::fromUtf8(className)); +} +QLayout *Layout::createLayout(int type) +{ + Q_ASSERT(m_layoutType != LayoutInfo::HSplitter && m_layoutType != LayoutInfo::VSplitter); + QLayout *layout = m_formWindow->core()->widgetFactory()->createLayout(m_layoutBase, 0, type); + // set a name + layout->setObjectName(suggestLayoutName(layout->metaObject()->className())); + m_formWindow->ensureUniqueObjectName(layout); + // QLayoutWidget + QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(m_formWindow->core()->extensionManager(), layout); + if (sheet && qobject_cast<QLayoutWidget*>(m_layoutBase)) { + sheet->setProperty(sheet->indexOf(QLatin1String("leftMargin")), 0); + sheet->setProperty(sheet->indexOf(QLatin1String("topMargin")), 0); + sheet->setProperty(sheet->indexOf(QLatin1String("rightMargin")), 0); + sheet->setProperty(sheet->indexOf(QLatin1String("bottomMargin")), 0); + } + return layout; +} + +void Layout::reparentToLayoutBase(QWidget *w) +{ + if (w->parent() != m_layoutBase) { + w->setParent(m_layoutBase, 0); + w->move(QPoint(0,0)); + } +} + +namespace { // within qdesigner_internal + +// ----- PositionSortPredicate: Predicate to be usable as LessThan function to sort widgets by position +class PositionSortPredicate { +public: + PositionSortPredicate(Qt::Orientation orientation) : m_orientation(orientation) {} + bool operator()(const QWidget* w1, const QWidget* w2) { + return m_orientation == Qt::Horizontal ? w1->x() < w2->x() : w1->y() < w2->y(); + } + private: + const Qt::Orientation m_orientation; +}; + +// -------- BoxLayout +class BoxLayout : public Layout +{ +public: + BoxLayout(const QWidgetList &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb, + Qt::Orientation orientation); + + virtual void doLayout(); + virtual void sort(); + +private: + const Qt::Orientation m_orientation; +}; + +BoxLayout::BoxLayout(const QWidgetList &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb, + Qt::Orientation orientation) : + Layout(wl, p, fw, lb, orientation == Qt::Horizontal ? LayoutInfo::HBox : LayoutInfo::VBox), + m_orientation(orientation) +{ +} + +void BoxLayout::sort() +{ + QWidgetList wl = widgets(); + qStableSort(wl.begin(), wl.end(), PositionSortPredicate(m_orientation)); + setWidgets(wl); +} + +void BoxLayout::doLayout() +{ + bool needMove, needReparent; + if (!prepareLayout(needMove, needReparent)) + return; + + QBoxLayout *layout = static_cast<QBoxLayout *>(createLayout(m_orientation == Qt::Horizontal ? LayoutInfo::HBox : LayoutInfo::VBox)); + + QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem. + + const QWidgetList::const_iterator cend = widgets().constEnd(); + for (QWidgetList::const_iterator it = widgets().constBegin(); it != cend; ++it) { + QWidget *w = *it; + if (needReparent) + reparentToLayoutBase(w); + + if (const Spacer *spacer = qobject_cast<const Spacer*>(w)) + layout->addWidget(w, 0, spacer->alignment()); + else + layout->addWidget(w); + w->show(); + } + finishLayout(needMove, layout); +} + +// -------- SplitterLayout +class SplitterLayout : public Layout +{ +public: + SplitterLayout(const QWidgetList &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb, + Qt::Orientation orientation); + + virtual void doLayout(); + virtual void sort(); + +private: + const Qt::Orientation m_orientation; +}; + +SplitterLayout::SplitterLayout(const QWidgetList &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb, + Qt::Orientation orientation) : + Layout(wl, p, fw, lb, orientation == Qt::Horizontal ? LayoutInfo::HSplitter : LayoutInfo::VSplitter), + m_orientation(orientation) +{ +} + +void SplitterLayout::sort() +{ + QWidgetList wl = widgets(); + qStableSort(wl.begin(), wl.end(), PositionSortPredicate(m_orientation)); + setWidgets(wl); +} + +void SplitterLayout::doLayout() +{ + bool needMove, needReparent; + if (!prepareLayout(needMove, needReparent)) + return; + + QSplitter *splitter = qobject_cast<QSplitter*>(layoutBaseWidget()); + Q_ASSERT(splitter != 0); + + + const QWidgetList::const_iterator cend = widgets().constEnd(); + for (QWidgetList::const_iterator it = widgets().constBegin(); it != cend; ++it) { + QWidget *w = *it; + if (needReparent) + reparentToLayoutBase(w); + splitter->addWidget(w); + w->show(); + } + + splitter->setOrientation(m_orientation); + finishLayout(needMove); +} + +// ---------- Grid: Helper for laying out grids + +class Grid +{ +public: + enum Mode { + GridLayout, // Arbitrary size/supports span + FormLayout // 2-column/no span + }; + + Grid(Mode mode); + void resize(int nrows, int ncols); + + ~Grid(); + + QWidget* cell(int row, int col) const { return m_cells[ row * m_ncols + col]; } + + void setCells(const QRect &c, QWidget* w); + + bool empty() const { return m_nrows * m_ncols; } + int numRows() const { return m_nrows; } + int numCols() const { return m_ncols; } + + void simplify(); + bool locateWidget(QWidget* w, int& row, int& col, int& rowspan, int& colspan) const; + + QDebug debug(QDebug str) const; + +private: + void setCell(int row, int col, QWidget* w) { m_cells[ row * m_ncols + col] = w; } + void swapCells(int r1, int c1, int r2, int c2); + void shrink(); + void reallocFormLayout(); + int countRow(int r, int c) const; + int countCol(int r, int c) const; + void setRow(int r, int c, QWidget* w, int count); + void setCol(int r, int c, QWidget* w, int count); + bool isWidgetStartCol(int c) const; + bool isWidgetEndCol(int c) const; + bool isWidgetStartRow(int r) const; + bool isWidgetEndRow(int r) const; + bool isWidgetTopLeft(int r, int c) const; + void extendLeft(); + void extendRight(); + void extendUp(); + void extendDown(); + bool shrinkFormLayoutSpans(); + + const Mode m_mode; + int m_nrows; + int m_ncols; + + QWidget** m_cells; // widget matrix w11, w12, w21... +}; + +Grid::Grid(Mode mode) : + m_mode(mode), + m_nrows(0), + m_ncols(0), + m_cells(0) +{ +} + +Grid::~Grid() +{ + delete [] m_cells; +} + +void Grid::resize(int nrows, int ncols) +{ + delete [] m_cells; + m_cells = 0; + m_nrows = nrows; + m_ncols = ncols; + if (const int allocSize = m_nrows * m_ncols) { + m_cells = new QWidget*[allocSize]; + qFill(m_cells, m_cells + allocSize, static_cast<QWidget *>(0)); + } +} + +QDebug Grid::debug(QDebug str) const +{ + str << m_nrows << 'x' << m_ncols << '\n'; + QSet<QWidget *> widgets; + const int cellCount = m_nrows * m_ncols; + int row, col, rowspan, colspan; + for (int c = 0; c < cellCount; c++) + if (QWidget *w = m_cells[c]) + if (!widgets.contains(w)) { + widgets.insert(w); + locateWidget(w, row, col, rowspan, colspan); + str << w << " at " << row << col << rowspan << 'x' << colspan << '\n'; + } + for (int r = 0; r < m_nrows; r++) + for (int c = 0; c < m_ncols; c++) + str << "At " << r << c << cell(r, c) << '\n'; + + return str; +} + +static inline QDebug operator<<(QDebug str, const Grid &g) { return g.debug(str); } + +void Grid::setCells(const QRect &c, QWidget* w) +{ + const int bottom = c.top() + c.height(); + const int width = c.width(); + + for (int r = c.top(); r < bottom; r++) { + QWidget **pos = m_cells + r * m_ncols + c.left(); + qFill(pos, pos + width, w); + } +} + + +void Grid::swapCells(int r1, int c1, int r2, int c2) +{ + QWidget *w1 = cell(r1, c1); + setCell(r1, c1, cell(r2, c2)); + setCell(r2, c2, w1); +} + +int Grid::countRow(int r, int c) const +{ + QWidget* w = cell(r, c); + int i = c + 1; + while (i < m_ncols && cell(r, i) == w) + i++; + return i - c; +} + +int Grid::countCol(int r, int c) const +{ + QWidget* w = cell(r, c); + int i = r + 1; + while (i < m_nrows && cell(i, c) == w) + i++; + return i - r; +} + +void Grid::setCol(int r, int c, QWidget* w, int count) +{ + for (int i = 0; i < count; i++) + setCell(r + i, c, w); +} + +void Grid::setRow(int r, int c, QWidget* w, int count) +{ + for (int i = 0; i < count; i++) + setCell(r, c + i, w); +} + +bool Grid::isWidgetStartCol(int c) const +{ + for (int r = 0; r < m_nrows; r++) { + if (cell(r, c) && ((c==0) || (cell(r, c) != cell(r, c-1)))) { + return true; + } + } + return false; +} + +bool Grid::isWidgetEndCol(int c) const +{ + for (int r = 0; r < m_nrows; r++) { + if (cell(r, c) && ((c == m_ncols-1) || (cell(r, c) != cell(r, c+1)))) + return true; + } + return false; +} + +bool Grid::isWidgetStartRow(int r) const +{ + for ( int c = 0; c < m_ncols; c++) { + if (cell(r, c) && ((r==0) || (cell(r, c) != cell(r-1, c)))) + return true; + } + return false; +} + +bool Grid::isWidgetEndRow(int r) const +{ + for (int c = 0; c < m_ncols; c++) { + if (cell(r, c) && ((r == m_nrows-1) || (cell(r, c) != cell(r+1, c)))) + return true; + } + return false; +} + + +bool Grid::isWidgetTopLeft(int r, int c) const +{ + QWidget* w = cell(r, c); + if (!w) + return false; + return (!r || cell(r-1, c) != w) && (!c || cell(r, c-1) != w); +} + +void Grid::extendLeft() +{ + for (int c = 1; c < m_ncols; c++) { + for (int r = 0; r < m_nrows; r++) { + QWidget* w = cell(r, c); + if (!w) + continue; + + const int cc = countCol(r, c); + int stretch = 0; + for (int i = c-1; i >= 0; i--) { + if (cell(r, i)) + break; + if (countCol(r, i) < cc) + break; + if (isWidgetEndCol(i)) + break; + if (isWidgetStartCol(i)) { + stretch = c - i; + break; + } + } + if (stretch) { + for (int i = 0; i < stretch; i++) + setCol(r, c-i-1, w, cc); + } + } + } +} + + +void Grid::extendRight() +{ + for (int c = m_ncols - 2; c >= 0; c--) { + for (int r = 0; r < m_nrows; r++) { + QWidget* w = cell(r, c); + if (!w) + continue; + const int cc = countCol(r, c); + int stretch = 0; + for (int i = c+1; i < m_ncols; i++) { + if (cell(r, i)) + break; + if (countCol(r, i) < cc) + break; + if (isWidgetStartCol(i)) + break; + if (isWidgetEndCol(i)) { + stretch = i - c; + break; + } + } + if (stretch) { + for (int i = 0; i < stretch; i++) + setCol(r, c+i+1, w, cc); + } + } + } + +} + +void Grid::extendUp() +{ + for (int r = 1; r < m_nrows; r++) { + for (int c = 0; c < m_ncols; c++) { + QWidget* w = cell(r, c); + if (!w) + continue; + const int cr = countRow(r, c); + int stretch = 0; + for (int i = r-1; i >= 0; i--) { + if (cell(i, c)) + break; + if (countRow(i, c) < cr) + break; + if (isWidgetEndRow(i)) + break; + if (isWidgetStartRow(i)) { + stretch = r - i; + break; + } + } + if (stretch) { + for (int i = 0; i < stretch; i++) + setRow(r-i-1, c, w, cr); + } + } + } +} + +void Grid::extendDown() +{ + for (int r = m_nrows - 2; r >= 0; r--) { + for (int c = 0; c < m_ncols; c++) { + QWidget* w = cell(r, c); + if (!w) + continue; + const int cr = countRow(r, c); + int stretch = 0; + for (int i = r+1; i < m_nrows; i++) { + if (cell(i, c)) + break; + if (countRow(i, c) < cr) + break; + if (isWidgetStartRow(i)) + break; + if (isWidgetEndRow(i)) { + stretch = i - r; + break; + } + } + if (stretch) { + for (int i = 0; i < stretch; i++) + setRow(r+i+1, c, w, cr); + } + } + } +} + +void Grid::simplify() +{ + switch (m_mode) { + case GridLayout: + // Grid: Extend all widgets to occupy most space and delete + // rows/columns that are not bordering on a widget + extendLeft(); + extendRight(); + extendUp(); + extendDown(); + shrink(); + break; + case FormLayout: + // Form: First treat it as a grid to get the same behaviour + // regarding spanning and shrinking. Then restrict the span to + // the horizontal span possible in the form, simplify again + // and spread the widgets over a 2-column layout + extendLeft(); + extendRight(); + extendUp(); + extendDown(); + shrink(); + if (shrinkFormLayoutSpans()) + shrink(); + reallocFormLayout(); + break; + } + +} + +void Grid::shrink() +{ + // tick off the occupied cols/rows (bordering on widget edges) + QVector<bool> columns(m_ncols, false); + QVector<bool> rows(m_nrows, false); + + for (int c = 0; c < m_ncols; c++) + for (int r = 0; r < m_nrows; r++) + if (isWidgetTopLeft(r, c)) + rows[r] = columns[c] = true; + + // remove empty cols/rows + const int simplifiedNCols = columns.count(true); + const int simplifiedNRows = rows.count(true); + if (simplifiedNCols == m_ncols && simplifiedNRows == m_nrows) + return; + // reallocate and copy omitting the empty cells + QWidget **simplifiedCells = new QWidget*[simplifiedNCols * simplifiedNRows]; + qFill(simplifiedCells, simplifiedCells + simplifiedNCols * simplifiedNRows, static_cast<QWidget *>(0)); + QWidget **simplifiedPtr = simplifiedCells; + + for (int r = 0; r < m_nrows; r++) + if (rows[r]) + for (int c = 0; c < m_ncols; c++) + if (columns[c]) { + if (QWidget *w = cell(r, c)) + *simplifiedPtr = w; + simplifiedPtr++; + } + Q_ASSERT(simplifiedPtr == simplifiedCells + simplifiedNCols * simplifiedNRows); + delete [] m_cells; + m_cells = simplifiedCells; + m_nrows = simplifiedNRows; + m_ncols = simplifiedNCols; +} + +bool Grid::shrinkFormLayoutSpans() +{ + bool shrunk = false; + typedef QSet<QWidget*> WidgetSet; + // Determine unique set of widgets + WidgetSet widgets; + QWidget **end = m_cells + m_ncols * m_nrows; + for (QWidget **wptr = m_cells; wptr < end; wptr++) + if (QWidget *w = *wptr) + widgets.insert(w); + // Restrict the widget span: max horizontal span at column 0: 2, anything else: 1 + const int maxRowSpan = 1; + const WidgetSet::const_iterator cend = widgets.constEnd(); + for (WidgetSet::const_iterator it = widgets.constBegin(); it != cend ; ++it) { + QWidget *w = *it; + int row, col, rowspan, colspan; + locateWidget(w, row, col, rowspan, colspan); + const int maxColSpan = col == 0 ? 2 : 1; + const int newColSpan = qMin(colspan, maxColSpan); + const int newRowSpan = qMin(rowspan, maxRowSpan); + if (newColSpan != colspan || newRowSpan != rowspan) { + setCells(QRect(col, row, colspan, rowspan), 0); + setCells(QRect(col, row, newColSpan, newRowSpan), w); + shrunk = true; + } + } + return shrunk; +} + +void Grid::reallocFormLayout() +{ + // Columns matching? -> happy! + if (m_ncols == FormLayoutColumns) + return; + + // If there are offset columns (starting past the field column), + // move them to the left and squeeze them. This also prevents the + // following reallocation from creating empty form rows. + int pastRightWidgetCount = 0; + if (m_ncols > FormLayoutColumns) { + for (int r = 0; r < m_nrows; r++) { + // Try to find a column where the form columns are empty and + // there are widgets further to the right. + if (cell(r, 0) == 0 && cell(r, 1) == 0) { + int sourceCol = FormLayoutColumns; + QWidget *firstWidget = 0; + for ( ; sourceCol < m_ncols; sourceCol++) + if (QWidget *w = cell(r, sourceCol)) { + firstWidget = w; + break; + } + if (firstWidget) { + // Move/squeeze. Copy to beginning of column if it is a label, else field + int targetCol = qobject_cast<QLabel*>(firstWidget) ? 0 : 1; + for ( ; sourceCol < m_ncols; sourceCol++) + if (QWidget *w = cell(r, sourceCol)) + setCell(r, targetCol++, w); + // Pad with zero + for ( ; targetCol < m_ncols; targetCol++) + setCell(r, targetCol, 0); + } + } + // Any protruding widgets left on that row? + for (int c = FormLayoutColumns; c < m_ncols; c++) + if (cell(r, c)) + pastRightWidgetCount++; + } + } + // Reallocate with 2 columns. Just insert the protruding ones as fields. + const int formNRows = m_nrows + pastRightWidgetCount; + QWidget **formCells = new QWidget*[FormLayoutColumns * formNRows]; + qFill(formCells, formCells + FormLayoutColumns * formNRows, static_cast<QWidget *>(0)); + QWidget **formPtr = formCells; + const int matchingColumns = qMin(m_ncols, static_cast<int>(FormLayoutColumns)); + for (int r = 0; r < m_nrows; r++) { + int c = 0; + for ( ; c < matchingColumns; c++) // Just copy over matching columns + *formPtr++ = cell(r, c); + formPtr += FormLayoutColumns - matchingColumns; // In case old format was 1 column + // protruding widgets: Insert as single-field rows + for ( ; c < m_ncols; c++) + if (QWidget *w = cell(r, c)) { + formPtr++; + *formPtr++ = w; + } + } + Q_ASSERT(formPtr == formCells + FormLayoutColumns * formNRows); + delete [] m_cells; + m_cells = formCells; + m_nrows = formNRows; + m_ncols = FormLayoutColumns; +} + +bool Grid::locateWidget(QWidget *w, int &row, int &col, int &rowspan, int &colspan) const +{ + const int end = m_nrows * m_ncols; + const int startIndex = qFind(m_cells, m_cells + end, w) - m_cells; + if (startIndex == end) + return false; + + row = startIndex / m_ncols; + col = startIndex % m_ncols; + for (rowspan = 1; row + rowspan < m_nrows && cell(row + rowspan, col) == w; rowspan++) {} + for (colspan = 1; col + colspan < m_ncols && cell(row, col + colspan) == w; colspan++) {} + return true; +} + +// QGridLayout/QFormLayout Helpers: get item position/add item (overloads to make templates work) + +void getGridItemPosition(QGridLayout *gridLayout, int index, int *row, int *column, int *rowspan, int *colspan) +{ + gridLayout->getItemPosition(index, row, column, rowspan, colspan); +} + +void addWidgetToGrid(QGridLayout *lt, QWidget * widget, int row, int column, int rowSpan, int columnSpan, Qt::Alignment alignment) +{ + lt->addWidget(widget, row, column, rowSpan, columnSpan, alignment); +} + +inline void getGridItemPosition(QFormLayout *formLayout, int index, int *row, int *column, int *rowspan, int *colspan) +{ + getFormLayoutItemPosition(formLayout, index, row, column, rowspan, colspan); +} + +inline void addWidgetToGrid(QFormLayout *lt, QWidget * widget, int row, int column, int, int columnSpan, Qt::Alignment) +{ + formLayoutAddWidget(lt, widget, QRect(column, row, columnSpan, 1), false); +} + +// ----------- Base template for grid like layouts +template <class GridLikeLayout, int LayoutType, int GridMode> +class GridLayout : public Layout +{ +public: + GridLayout(const QWidgetList &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb); + + virtual void doLayout(); + virtual void sort() { setWidgets(buildGrid(widgets())); } + +protected: + QWidget *widgetAt(GridLikeLayout *layout, int row, int column) const; + +protected: + QWidgetList buildGrid(const QWidgetList &); + Grid m_grid; +}; + +template <class GridLikeLayout, int LayoutType, int GridMode> +GridLayout<GridLikeLayout, LayoutType, GridMode>::GridLayout(const QWidgetList &wl, QWidget *p, QDesignerFormWindowInterface *fw, QWidget *lb) : + Layout(wl, p, fw, lb, LayoutInfo::Grid), + m_grid(static_cast<Grid::Mode>(GridMode)) +{ +} + +template <class GridLikeLayout, int LayoutType, int GridMode> +QWidget *GridLayout<GridLikeLayout, LayoutType, GridMode>::widgetAt(GridLikeLayout *layout, int row, int column) const +{ + int index = 0; + while (QLayoutItem *item = layout->itemAt(index)) { + if (item->widget()) { + int r, c, rowspan, colspan; + getGridItemPosition(layout, index, &r, &c, &rowspan, &colspan); + if (row == r && column == c) + return item->widget(); + } + ++index; + } + return 0; +} + +template <class GridLikeLayout, int LayoutType, int GridMode> +void GridLayout<GridLikeLayout, LayoutType, GridMode>::doLayout() +{ + bool needMove, needReparent; + if (!prepareLayout(needMove, needReparent)) + return; + + GridLikeLayout *layout = static_cast<GridLikeLayout *>(createLayout(LayoutType)); + + if (m_grid.empty()) + sort(); + + QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem. + + const QWidgetList::const_iterator cend = widgets().constEnd(); + for (QWidgetList::const_iterator it = widgets().constBegin(); it != cend; ++it) { + QWidget *w = *it; + int r = 0, c = 0, rs = 0, cs = 0; + + if (m_grid.locateWidget(w, r, c, rs, cs)) { + if (needReparent) + reparentToLayoutBase(w); + + Qt::Alignment alignment = Qt::Alignment(0); + if (const Spacer *spacer = qobject_cast<const Spacer*>(w)) + alignment = spacer->alignment(); + + if (rs * cs == 1) { + addWidgetToGrid(layout, w, r, c, 1, 1, alignment); + } else { + addWidgetToGrid(layout, w, r, c, rs, cs, alignment); + } + + w->show(); + } else { + qDebug("ooops, widget '%s' does not fit in layout", w->objectName().toUtf8().constData()); + } + } + + QLayoutSupport::createEmptyCells(layout); + + finishLayout(needMove, layout); +} + +// Remove duplicate entries (Remove next, if equal to current) +void removeIntVecDuplicates(QVector<int> &v) +{ + if (v.size() < 2) + return; + + for (QVector<int>::iterator current = v.begin() ; (current != v.end()) && ((current+1) != v.end()) ; ) + if ( (*current == *(current+1)) ) + v.erase(current+1); + else + ++current; +} + +// Ensure a non-zero size for a widget geometry (squeezed spacers) +inline QRect expandGeometry(const QRect &rect) +{ + return rect.isEmpty() ? QRect(rect.topLeft(), rect.size().expandedTo(QSize(1, 1))) : rect; +} + +template <class GridLikeLayout, int LayoutType, int GridMode> +QWidgetList GridLayout<GridLikeLayout, LayoutType, GridMode>::buildGrid(const QWidgetList &widgetList) +{ + if (widgetList.empty()) + return QWidgetList(); + + // Pixel to cell conversion: + // By keeping a list of start'n'stop values (x & y) for each widget, + // it is possible to create a very small grid of cells to represent + // the widget layout. + // ----------------------------------------------------------------- + + // We need a list of both start and stop values for x- & y-axis + const int widgetCount = widgetList.size(); + QVector<int> x( widgetCount * 2 ); + QVector<int> y( widgetCount * 2 ); + + // Using push_back would look nicer, but operator[] is much faster + int index = 0; + for (int i = 0; i < widgetCount; ++i) { + const QRect widgetPos = expandGeometry(widgetList.at(i)->geometry()); + x[index] = widgetPos.left(); + x[index+1] = widgetPos.right(); + y[index] = widgetPos.top(); + y[index+1] = widgetPos.bottom(); + index += 2; + } + + qSort(x); + qSort(y); + + // Remove duplicate x entries (Remove next, if equal to current) + removeIntVecDuplicates(x); + removeIntVecDuplicates(y); + + // Note that left == right and top == bottom for size 1 items; reserve + // enough space + m_grid.resize(y.size(), x.size()); + + const QWidgetList::const_iterator cend = widgetList.constEnd(); + for (QWidgetList::const_iterator it = widgetList.constBegin(); it != cend; ++it) { + QWidget *w = *it; + // Mark the cells in the grid that contains a widget + const QRect widgetPos = expandGeometry(w->geometry()); + QRect c(0, 0, 0, 0); // rect of columns/rows + + // From left til right (not including) + const int leftIdx = x.indexOf(widgetPos.left()); + Q_ASSERT(leftIdx != -1); + c.setLeft(leftIdx); + c.setRight(leftIdx); + for (int cw=leftIdx; cw<x.size(); cw++) + if (x[cw] < widgetPos.right()) + c.setRight(cw); + else + break; + // From top til bottom (not including) + const int topIdx = y.indexOf(widgetPos.top()); + Q_ASSERT(topIdx != -1); + c.setTop(topIdx); + c.setBottom(topIdx); + for (int ch=topIdx; ch<y.size(); ch++) + if (y[ch] < widgetPos.bottom()) + c.setBottom(ch); + else + break; + m_grid.setCells(c, w); // Mark cellblock + } + + m_grid.simplify(); + + QWidgetList ordered; + for (int i = 0; i < m_grid.numRows(); i++) + for (int j = 0; j < m_grid.numCols(); j++) { + QWidget *w = m_grid.cell(i, j); + if (w && !ordered.contains(w)) + ordered.append(w); + } + return ordered; +} +} // anonymous + +Layout* Layout::createLayout(const QWidgetList &widgets, QWidget *parentWidget, + QDesignerFormWindowInterface *fw, + QWidget *layoutBase, LayoutInfo::Type layoutType) +{ + switch (layoutType) { + case LayoutInfo::Grid: + return new GridLayout<QGridLayout, LayoutInfo::Grid, Grid::GridLayout>(widgets, parentWidget, fw, layoutBase); + case LayoutInfo::HBox: + case LayoutInfo::VBox: { + const Qt::Orientation orientation = layoutType == LayoutInfo::HBox ? Qt::Horizontal : Qt::Vertical; + return new BoxLayout(widgets, parentWidget, fw, layoutBase, orientation); + } + case LayoutInfo::HSplitter: + case LayoutInfo::VSplitter: { + const Qt::Orientation orientation = layoutType == LayoutInfo::HSplitter ? Qt::Horizontal : Qt::Vertical; + return new SplitterLayout(widgets, parentWidget, fw, layoutBase, orientation); + } + case LayoutInfo::Form: + return new GridLayout<QFormLayout, LayoutInfo::Form, Grid::FormLayout>(widgets, parentWidget, fw, layoutBase); + default: + break; + } + Q_ASSERT(0); + return 0; +} + +} // namespace qdesigner_internal + +QT_END_NAMESPACE |