--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/kernel/qgridlayout.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,1889 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgridlayout.h"
+#include "qapplication.h"
+#include "qwidget.h"
+#include "qlist.h"
+#include "qsizepolicy.h"
+#include "qvector.h"
+#include "qvarlengtharray.h"
+#include "qlayoutengine_p.h"
+#include "qlayout_p.h"
+
+QT_BEGIN_NAMESPACE
+
+struct QGridLayoutSizeTriple
+{
+ QSize minS;
+ QSize hint;
+ QSize maxS;
+};
+
+/*
+ Three internal classes related to QGridLayout: (1) QGridBox is a
+ QLayoutItem with (row, column) information and (torow, tocolumn) information; (3) QGridLayoutData is
+ the internal representation of a QGridLayout.
+*/
+
+class QGridBox
+{
+public:
+ QGridBox(QLayoutItem *lit) { item_ = lit; }
+
+ QGridBox(const QLayout *l, QWidget *wid) { item_ = QLayoutPrivate::createWidgetItem(l, wid); }
+ ~QGridBox() { delete item_; }
+
+ QSize sizeHint() const { return item_->sizeHint(); }
+ QSize minimumSize() const { return item_->minimumSize(); }
+ QSize maximumSize() const { return item_->maximumSize(); }
+ Qt::Orientations expandingDirections() const { return item_->expandingDirections(); }
+ bool isEmpty() const { return item_->isEmpty(); }
+
+ bool hasHeightForWidth() const { return item_->hasHeightForWidth(); }
+ int heightForWidth(int w) const { return item_->heightForWidth(w); }
+
+ void setAlignment(Qt::Alignment a) { item_->setAlignment(a); }
+ void setGeometry(const QRect &r) { item_->setGeometry(r); }
+ Qt::Alignment alignment() const { return item_->alignment(); }
+ QLayoutItem *item() { return item_; }
+ QLayoutItem *takeItem() { QLayoutItem *i = item_; item_ = 0; return i; }
+
+ int hStretch() { return item_->widget() ?
+ item_->widget()->sizePolicy().horizontalStretch() : 0; }
+ int vStretch() { return item_->widget() ?
+ item_->widget()->sizePolicy().verticalStretch() : 0; }
+
+private:
+ friend class QGridLayoutPrivate;
+ friend class QGridLayout;
+
+ inline int toRow(int rr) const { return torow >= 0 ? torow : rr - 1; }
+ inline int toCol(int cc) const { return tocol >= 0 ? tocol : cc - 1; }
+
+ QLayoutItem *item_;
+ int row, col;
+ int torow, tocol;
+};
+
+class QGridLayoutPrivate : public QLayoutPrivate
+{
+ Q_DECLARE_PUBLIC(QGridLayout)
+public:
+ QGridLayoutPrivate();
+
+ void add(QGridBox*, int row, int col);
+ void add(QGridBox*, int row1, int row2, int col1, int col2);
+ QSize sizeHint(int hSpacing, int vSpacing) const;
+ QSize minimumSize(int hSpacing, int vSpacing) const;
+ QSize maximumSize(int hSpacing, int vSpacing) const;
+
+ Qt::Orientations expandingDirections(int hSpacing, int vSpacing) const;
+
+ void distribute(QRect rect, int hSpacing, int vSpacing);
+ inline int numRows() const { return rr; }
+ inline int numCols() const { return cc; }
+ inline void expand(int rows, int cols)
+ { setSize(qMax(rows, rr), qMax(cols, cc)); }
+ inline void setRowStretch(int r, int s)
+ { expand(r + 1, 0); rStretch[r] = s; setDirty(); }
+ inline void setColStretch(int c, int s)
+ { expand(0, c + 1); cStretch[c] = s; setDirty(); }
+ inline int rowStretch(int r) const { return rStretch.at(r); }
+ inline int colStretch(int c) const { return cStretch.at(c); }
+ inline void setRowMinimumHeight(int r, int s)
+ { expand(r + 1, 0); rMinHeights[r] = s; setDirty(); }
+ inline void setColumnMinimumWidth(int c, int s)
+ { expand(0, c + 1); cMinWidths[c] = s; setDirty(); }
+ inline int rowSpacing(int r) const { return rMinHeights.at(r); }
+ inline int colSpacing(int c) const { return cMinWidths.at(c); }
+
+ inline void setReversed(bool r, bool c) { hReversed = c; vReversed = r; }
+ inline bool horReversed() const { return hReversed; }
+ inline bool verReversed() const { return vReversed; }
+ inline void setDirty() { needRecalc = true; hfw_width = -1; }
+ inline bool isDirty() const { return needRecalc; }
+ bool hasHeightForWidth(int hSpacing, int vSpacing);
+ int heightForWidth(int width, int hSpacing, int vSpacing);
+ int minimumHeightForWidth(int width, int hSpacing, int vSpacing);
+
+ inline void getNextPos(int &row, int &col) { row = nextR; col = nextC; }
+ inline int count() const { return things.count(); }
+ QRect cellRect(int row, int col) const;
+
+ inline QLayoutItem *itemAt(int index) const {
+ if (index < things.count())
+ return things.at(index)->item();
+ else
+ return 0;
+ }
+ inline QLayoutItem *takeAt(int index) {
+ QLayoutItem *item = 0;
+ if (index < things.count()) {
+ QGridBox *b = things.takeAt(index);
+ if (b) {
+ item = b->takeItem();
+ delete b;
+ }
+ }
+ return item;
+ }
+
+ void getItemPosition(int index, int *row, int *column, int *rowSpan, int *columnSpan) {
+ if (index < things.count()) {
+ QGridBox *b = things.at(index);
+ int toRow = b->toRow(rr);
+ int toCol = b->toCol(cc);
+ *row = b->row;
+ *column = b->col;
+ *rowSpan = toRow - *row + 1;
+ *columnSpan = toCol - *column +1;
+ }
+ }
+ void deleteAll();
+
+private:
+ void setNextPosAfter(int r, int c);
+ void recalcHFW(int w);
+ void addHfwData(QGridBox *box, int width);
+ void init();
+ QSize findSize(int QLayoutStruct::*, int hSpacing, int vSpacing) const;
+ void addData(QGridBox *b, const QGridLayoutSizeTriple &sizes, bool r, bool c);
+ void setSize(int rows, int cols);
+ void setupSpacings(QVector<QLayoutStruct> &chain, QGridBox *grid[], int fixedSpacing,
+ Qt::Orientation orientation);
+ void setupLayoutData(int hSpacing, int vSpacing);
+ void setupHfwLayoutData();
+ void effectiveMargins(int *left, int *top, int *right, int *bottom) const;
+
+ int rr;
+ int cc;
+ QVector<QLayoutStruct> rowData;
+ QVector<QLayoutStruct> colData;
+ QVector<QLayoutStruct> *hfwData;
+ QVector<int> rStretch;
+ QVector<int> cStretch;
+ QVector<int> rMinHeights;
+ QVector<int> cMinWidths;
+ QList<QGridBox *> things;
+
+ int hfw_width;
+ int hfw_height;
+ int hfw_minheight;
+ int nextR;
+ int nextC;
+
+ int horizontalSpacing;
+ int verticalSpacing;
+ int leftMargin;
+ int topMargin;
+ int rightMargin;
+ int bottomMargin;
+
+ uint hReversed : 1;
+ uint vReversed : 1;
+ uint needRecalc : 1;
+ uint has_hfw : 1;
+ uint addVertical : 1;
+};
+
+void QGridLayoutPrivate::effectiveMargins(int *left, int *top, int *right, int *bottom) const
+{
+ int l = leftMargin;
+ int t = topMargin;
+ int r = rightMargin;
+ int b = bottomMargin;
+#ifdef Q_WS_MAC
+ int leftMost = INT_MAX;
+ int topMost = INT_MAX;
+ int rightMost = 0;
+ int bottomMost = 0;
+
+ QWidget *w = 0;
+ const int n = things.count();
+ for (int i = 0; i < n; ++i) {
+ QGridBox *box = things.at(i);
+ QLayoutItem *itm = box->item();
+ w = itm->widget();
+ if (w) {
+ bool visualHReversed = hReversed != (w->layoutDirection() == Qt::RightToLeft);
+ QRect lir = itm->geometry();
+ QRect wr = w->geometry();
+ if (box->col <= leftMost) {
+ if (box->col < leftMost) {
+ // we found an item even closer to the margin, discard.
+ leftMost = box->col;
+ if (visualHReversed)
+ r = rightMargin;
+ else
+ l = leftMargin;
+ }
+ if (visualHReversed) {
+ r = qMax(r, wr.right() - lir.right());
+ } else {
+ l = qMax(l, lir.left() - wr.left());
+ }
+ }
+ if (box->row <= topMost) {
+ if (box->row < topMost) {
+ // we found an item even closer to the margin, discard.
+ topMost = box->row;
+ if (vReversed)
+ b = bottomMargin;
+ else
+ t = topMargin;
+ }
+ if (vReversed)
+ b = qMax(b, wr.bottom() - lir.bottom());
+ else
+ t = qMax(t, lir.top() - wr.top());
+ }
+ if (box->toCol(cc) >= rightMost) {
+ if (box->toCol(cc) > rightMost) {
+ // we found an item even closer to the margin, discard.
+ rightMost = box->toCol(cc);
+ if (visualHReversed)
+ l = leftMargin;
+ else
+ r = rightMargin;
+ }
+ if (visualHReversed) {
+ l = qMax(l, lir.left() - wr.left());
+ } else {
+ r = qMax(r, wr.right() - lir.right());
+ }
+
+ }
+ if (box->toRow(rr) >= bottomMost) {
+ if (box->toRow(rr) > bottomMost) {
+ // we found an item even closer to the margin, discard.
+ bottomMost = box->toRow(rr);
+ if (vReversed)
+ t = topMargin;
+ else
+ b = bottomMargin;
+ }
+ if (vReversed)
+ t = qMax(t, lir.top() - wr.top());
+ else
+ b = qMax(b, wr.bottom() - lir.bottom());
+ }
+ }
+ }
+
+#endif
+ if (left)
+ *left = l;
+ if (top)
+ *top = t;
+ if (right)
+ *right = r;
+ if (bottom)
+ *bottom = b;
+}
+
+QGridLayoutPrivate::QGridLayoutPrivate()
+{
+ addVertical = false;
+ setDirty();
+ rr = cc = 0;
+ nextR = nextC = 0;
+ hfwData = 0;
+ hReversed = false;
+ vReversed = false;
+ horizontalSpacing = -1;
+ verticalSpacing = -1;
+}
+
+#if 0
+QGridLayoutPrivate::QGridLayoutPrivate(int nRows, int nCols)
+ : rowData(0), colData(0)
+{
+ init();
+ if (nRows < 0) {
+ nRows = 1;
+ addVertical = false;
+ }
+ if (nCols < 0) {
+ nCols = 1;
+ addVertical = true;
+ }
+ setSize(nRows, nCols);
+}
+#endif
+
+void QGridLayoutPrivate::deleteAll()
+{
+ while (!things.isEmpty())
+ delete things.takeFirst();
+ delete hfwData;
+}
+
+bool QGridLayoutPrivate::hasHeightForWidth(int hSpacing, int vSpacing)
+{
+ setupLayoutData(hSpacing, vSpacing);
+ return has_hfw;
+}
+
+/*
+ Assumes that setupLayoutData() has been called, and that
+ qGeomCalc() has filled in colData with appropriate values.
+*/
+void QGridLayoutPrivate::recalcHFW(int w)
+{
+ /*
+ Go through all children, using colData and heightForWidth()
+ and put the results in hfwData.
+ */
+ if (!hfwData)
+ hfwData = new QVector<QLayoutStruct>(rr);
+ setupHfwLayoutData();
+ QVector<QLayoutStruct> &rData = *hfwData;
+
+ int h = 0;
+ int mh = 0;
+ for (int r = 0; r < rr; r++) {
+ int spacing = rData.at(r).spacing;
+ h += rData.at(r).sizeHint + spacing;
+ mh += rData.at(r).minimumSize + spacing;
+ }
+
+ hfw_width = w;
+ hfw_height = qMin(QLAYOUTSIZE_MAX, h);
+ hfw_minheight = qMin(QLAYOUTSIZE_MAX, mh);
+}
+
+int QGridLayoutPrivate::heightForWidth(int w, int hSpacing, int vSpacing)
+{
+ setupLayoutData(hSpacing, vSpacing);
+ if (!has_hfw)
+ return -1;
+ int left, top, right, bottom;
+ effectiveMargins(&left, &top, &right, &bottom);
+
+ int hMargins = left + right;
+ if (w - hMargins != hfw_width) {
+ qGeomCalc(colData, 0, cc, 0, w - hMargins);
+ recalcHFW(w - hMargins);
+ }
+ return hfw_height + top + bottom;
+}
+
+int QGridLayoutPrivate::minimumHeightForWidth(int w, int hSpacing, int vSpacing)
+{
+ (void)heightForWidth(w, hSpacing, vSpacing);
+ if (!has_hfw)
+ return -1;
+ int top, bottom;
+ effectiveMargins(0, &top, 0, &bottom);
+ return hfw_minheight + top + bottom;
+}
+
+QSize QGridLayoutPrivate::findSize(int QLayoutStruct::*size, int hSpacing, int vSpacing) const
+{
+ QGridLayoutPrivate *that = const_cast<QGridLayoutPrivate*>(this);
+ that->setupLayoutData(hSpacing, vSpacing);
+
+ int w = 0;
+ int h = 0;
+
+ for (int r = 0; r < rr; r++)
+ h += rowData.at(r).*size + rowData.at(r).spacing;
+ for (int c = 0; c < cc; c++)
+ w += colData.at(c).*size + colData.at(c).spacing;
+
+ w = qMin(QLAYOUTSIZE_MAX, w);
+ h = qMin(QLAYOUTSIZE_MAX, h);
+
+ return QSize(w, h);
+}
+
+Qt::Orientations QGridLayoutPrivate::expandingDirections(int hSpacing, int vSpacing) const
+{
+ QGridLayoutPrivate *that = const_cast<QGridLayoutPrivate*>(this);
+ that->setupLayoutData(hSpacing, vSpacing);
+ Qt::Orientations ret;
+
+ for (int r = 0; r < rr; r++) {
+ if (rowData.at(r).expansive) {
+ ret |= Qt::Vertical;
+ break;
+ }
+ }
+ for (int c = 0; c < cc; c++) {
+ if (colData.at(c).expansive) {
+ ret |= Qt::Horizontal;
+ break;
+ }
+ }
+ return ret;
+}
+
+QSize QGridLayoutPrivate::sizeHint(int hSpacing, int vSpacing) const
+{
+ return findSize(&QLayoutStruct::sizeHint, hSpacing, vSpacing);
+}
+
+QSize QGridLayoutPrivate::maximumSize(int hSpacing, int vSpacing) const
+{
+ return findSize(&QLayoutStruct::maximumSize, hSpacing, vSpacing);
+}
+
+QSize QGridLayoutPrivate::minimumSize(int hSpacing, int vSpacing) const
+{
+ return findSize(&QLayoutStruct::minimumSize, hSpacing, vSpacing);
+}
+
+void QGridLayoutPrivate::setSize(int r, int c)
+{
+ if ((int)rowData.size() < r) {
+ int newR = qMax(r, rr * 2);
+ rowData.resize(newR);
+ rStretch.resize(newR);
+ rMinHeights.resize(newR);
+ for (int i = rr; i < newR; i++) {
+ rowData[i].init();
+ rowData[i].maximumSize = 0;
+ rowData[i].pos = 0;
+ rowData[i].size = 0;
+ rStretch[i] = 0;
+ rMinHeights[i] = 0;
+ }
+ }
+ if ((int)colData.size() < c) {
+ int newC = qMax(c, cc * 2);
+ colData.resize(newC);
+ cStretch.resize(newC);
+ cMinWidths.resize(newC);
+ for (int i = cc; i < newC; i++) {
+ colData[i].init();
+ colData[i].maximumSize = 0;
+ colData[i].pos = 0;
+ colData[i].size = 0;
+ cStretch[i] = 0;
+ cMinWidths[i] = 0;
+ }
+ }
+
+ if (hfwData && (int)hfwData->size() < r) {
+ delete hfwData;
+ hfwData = 0;
+ hfw_width = -1;
+ }
+ rr = r;
+ cc = c;
+}
+
+void QGridLayoutPrivate::setNextPosAfter(int row, int col)
+{
+ if (addVertical) {
+ if (col > nextC || (col == nextC && row >= nextR)) {
+ nextR = row + 1;
+ nextC = col;
+ if (nextR >= rr) {
+ nextR = 0;
+ nextC++;
+ }
+ }
+ } else {
+ if (row > nextR || (row == nextR && col >= nextC)) {
+ nextR = row;
+ nextC = col + 1;
+ if (nextC >= cc) {
+ nextC = 0;
+ nextR++;
+ }
+ }
+ }
+}
+
+void QGridLayoutPrivate::add(QGridBox *box, int row, int col)
+{
+ expand(row + 1, col + 1);
+ box->row = box->torow = row;
+ box->col = box->tocol = col;
+ things.append(box);
+ setDirty();
+ setNextPosAfter(row, col);
+}
+
+void QGridLayoutPrivate::add(QGridBox *box, int row1, int row2, int col1, int col2)
+{
+ if (row2 >= 0 && row2 < row1)
+ qWarning("QGridLayout: Multi-cell fromRow greater than toRow");
+ if (col2 >= 0 && col2 < col1)
+ qWarning("QGridLayout: Multi-cell fromCol greater than toCol");
+ if (row1 == row2 && col1 == col2) {
+ add(box, row1, col1);
+ return;
+ }
+ expand(row2 + 1, col2 + 1);
+ box->row = row1;
+ box->col = col1;
+
+ box->torow = row2;
+ box->tocol = col2;
+
+ things.append(box);
+ setDirty();
+ if (col2 < 0)
+ col2 = cc - 1;
+
+ setNextPosAfter(row2, col2);
+}
+
+void QGridLayoutPrivate::addData(QGridBox *box, const QGridLayoutSizeTriple &sizes, bool r, bool c)
+{
+ const QWidget *widget = box->item()->widget();
+
+ if (box->isEmpty() && widget)
+ return;
+
+ if (c) {
+ QLayoutStruct *data = &colData[box->col];
+ if (!cStretch.at(box->col))
+ data->stretch = qMax(data->stretch, box->hStretch());
+ data->sizeHint = qMax(sizes.hint.width(), data->sizeHint);
+ data->minimumSize = qMax(sizes.minS.width(), data->minimumSize);
+
+ qMaxExpCalc(data->maximumSize, data->expansive, data->empty, sizes.maxS.width(),
+ box->expandingDirections() & Qt::Horizontal, box->isEmpty());
+ }
+ if (r) {
+ QLayoutStruct *data = &rowData[box->row];
+ if (!rStretch.at(box->row))
+ data->stretch = qMax(data->stretch, box->vStretch());
+ data->sizeHint = qMax(sizes.hint.height(), data->sizeHint);
+ data->minimumSize = qMax(sizes.minS.height(), data->minimumSize);
+
+ qMaxExpCalc(data->maximumSize, data->expansive, data->empty, sizes.maxS.height(),
+ box->expandingDirections() & Qt::Vertical, box->isEmpty());
+ }
+}
+
+static void initEmptyMultiBox(QVector<QLayoutStruct> &chain, int start, int end)
+{
+ for (int i = start; i <= end; i++) {
+ QLayoutStruct *data = &chain[i];
+ if (data->empty && data->maximumSize == 0) // truly empty box
+ data->maximumSize = QWIDGETSIZE_MAX;
+ data->empty = false;
+ }
+}
+
+static void distributeMultiBox(QVector<QLayoutStruct> &chain, int start, int end, int minSize,
+ int sizeHint, QVector<int> &stretchArray, int stretch)
+{
+ int i;
+ int w = 0;
+ int wh = 0;
+ int max = 0;
+
+ for (i = start; i <= end; i++) {
+ QLayoutStruct *data = &chain[i];
+ w += data->minimumSize;
+ wh += data->sizeHint;
+ max += data->maximumSize;
+ if (stretchArray.at(i) == 0)
+ data->stretch = qMax(data->stretch, stretch);
+
+ if (i != end) {
+ int spacing = data->spacing;
+ w += spacing;
+ wh += spacing;
+ max += spacing;
+ }
+ }
+
+ if (max < minSize) { // implies w < minSize
+ /*
+ We must increase the maximum size of at least one of the
+ items. qGeomCalc() will put the extra space in between the
+ items. We must recover that extra space and put it
+ somewhere. It does not really matter where, since the user
+ can always specify stretch factors and avoid this code.
+ */
+ qGeomCalc(chain, start, end - start + 1, 0, minSize);
+ int pos = 0;
+ for (i = start; i <= end; i++) {
+ QLayoutStruct *data = &chain[i];
+ int nextPos = (i == end) ? minSize : chain.at(i + 1).pos;
+ int realSize = nextPos - pos;
+ if (i != end)
+ realSize -= data->spacing;
+ if (data->minimumSize < realSize)
+ data->minimumSize = realSize;
+ if (data->maximumSize < data->minimumSize)
+ data->maximumSize = data->minimumSize;
+ pos = nextPos;
+ }
+ } else if (w < minSize) {
+ qGeomCalc(chain, start, end - start + 1, 0, minSize);
+ for (i = start; i <= end; i++) {
+ QLayoutStruct *data = &chain[i];
+ if (data->minimumSize < data->size)
+ data->minimumSize = data->size;
+ }
+ }
+
+ if (wh < sizeHint) {
+ qGeomCalc(chain, start, end - start + 1, 0, sizeHint);
+ for (i = start; i <= end; i++) {
+ QLayoutStruct *data = &chain[i];
+ if (data->sizeHint < data->size)
+ data->sizeHint = data->size;
+ }
+ }
+}
+
+static QGridBox *&gridAt(QGridBox *grid[], int r, int c, int cc,
+ Qt::Orientation orientation = Qt::Vertical)
+{
+ if (orientation == Qt::Horizontal)
+ qSwap(r, c);
+ return grid[(r * cc) + c];
+}
+
+void QGridLayoutPrivate::setupSpacings(QVector<QLayoutStruct> &chain,
+ QGridBox *grid[], int fixedSpacing,
+ Qt::Orientation orientation)
+{
+ Q_Q(QGridLayout);
+ int numRows = rr; // or columns if orientation is horizontal
+ int numColumns = cc; // or rows if orientation is horizontal
+
+ if (orientation == Qt::Horizontal) {
+ qSwap(numRows, numColumns);
+ }
+
+ QStyle *style = 0;
+ if (fixedSpacing < 0) {
+ if (QWidget *parentWidget = q->parentWidget())
+ style = parentWidget->style();
+ }
+
+ for (int c = 0; c < numColumns; ++c) {
+ QGridBox *previousBox = 0;
+ int previousRow = -1; // previous *non-empty* row
+
+ for (int r = 0; r < numRows; ++r) {
+ if (chain.at(r).empty)
+ continue;
+
+ QGridBox *box = gridAt(grid, r, c, cc, orientation);
+ if (previousRow != -1 && (!box || previousBox != box)) {
+ int spacing = fixedSpacing;
+ if (spacing < 0) {
+ QSizePolicy::ControlTypes controlTypes1 = QSizePolicy::DefaultType;
+ QSizePolicy::ControlTypes controlTypes2 = QSizePolicy::DefaultType;
+ if (previousBox)
+ controlTypes1 = previousBox->item()->controlTypes();
+ if (box)
+ controlTypes2 = box->item()->controlTypes();
+
+ if ((orientation == Qt::Horizontal && hReversed)
+ || (orientation == Qt::Vertical && vReversed))
+ qSwap(controlTypes1, controlTypes2);
+
+ if (style)
+ spacing = style->combinedLayoutSpacing(controlTypes1, controlTypes2,
+ orientation, 0, q->parentWidget());
+ } else {
+ if (orientation == Qt::Vertical) {
+ QGridBox *sibling = vReversed ? previousBox : box;
+ if (sibling) {
+ QWidget *wid = sibling->item()->widget();
+ if (wid)
+ spacing = qMax(spacing, sibling->item()->geometry().top() - wid->geometry().top() );
+ }
+ }
+ }
+
+ if (spacing > chain.at(previousRow).spacing)
+ chain[previousRow].spacing = spacing;
+ }
+
+ previousBox = box;
+ previousRow = r;
+ }
+ }
+}
+
+//#define QT_LAYOUT_DISABLE_CACHING
+
+void QGridLayoutPrivate::setupLayoutData(int hSpacing, int vSpacing)
+{
+ Q_Q(QGridLayout);
+
+#ifndef QT_LAYOUT_DISABLE_CACHING
+ if (!needRecalc)
+ return;
+#endif
+ has_hfw = false;
+ int i;
+
+ for (i = 0; i < rr; i++) {
+ rowData[i].init(rStretch.at(i), rMinHeights.at(i));
+ rowData[i].maximumSize = rStretch.at(i) ? QLAYOUTSIZE_MAX : rMinHeights.at(i);
+ }
+ for (i = 0; i < cc; i++) {
+ colData[i].init(cStretch.at(i), cMinWidths.at(i));
+ colData[i].maximumSize = cStretch.at(i) ? QLAYOUTSIZE_MAX : cMinWidths.at(i);
+ }
+
+ int n = things.size();
+ QVarLengthArray<QGridLayoutSizeTriple> sizes(n);
+
+ bool has_multi = false;
+
+ /*
+ Grid of items. We use it to determine which items are
+ adjacent to which and compute the spacings correctly.
+ */
+ QVarLengthArray<QGridBox *> grid(rr * cc);
+ qMemSet(grid.data(), 0, rr * cc * sizeof(QGridBox *));
+
+ /*
+ Initialize 'sizes' and 'grid' data structures, and insert
+ non-spanning items to our row and column data structures.
+ */
+ for (i = 0; i < n; ++i) {
+ QGridBox * const box = things.at(i);
+ sizes[i].minS = box->minimumSize();
+ sizes[i].hint = box->sizeHint();
+ sizes[i].maxS = box->maximumSize();
+
+ if (box->hasHeightForWidth())
+ has_hfw = true;
+
+ if (box->row == box->toRow(rr)) {
+ addData(box, sizes[i], true, false);
+ } else {
+ initEmptyMultiBox(rowData, box->row, box->toRow(rr));
+ has_multi = true;
+ }
+
+ if (box->col == box->toCol(cc)) {
+ addData(box, sizes[i], false, true);
+ } else {
+ initEmptyMultiBox(colData, box->col, box->toCol(cc));
+ has_multi = true;
+ }
+
+ for (int r = box->row; r <= box->toRow(rr); ++r) {
+ for (int c = box->col; c <= box->toCol(cc); ++c) {
+ gridAt(grid.data(), r, c, cc) = box;
+ }
+ }
+ }
+
+ setupSpacings(colData, grid.data(), hSpacing, Qt::Horizontal);
+ setupSpacings(rowData, grid.data(), vSpacing, Qt::Vertical);
+
+ /*
+ Insert multicell items to our row and column data structures.
+ This must be done after the non-spanning items to obtain a
+ better distribution in distributeMultiBox().
+ */
+ if (has_multi) {
+ for (i = 0; i < n; ++i) {
+ QGridBox * const box = things.at(i);
+
+ if (box->row != box->toRow(rr))
+ distributeMultiBox(rowData, box->row, box->toRow(rr), sizes[i].minS.height(),
+ sizes[i].hint.height(), rStretch, box->vStretch());
+ if (box->col != box->toCol(cc))
+ distributeMultiBox(colData, box->col, box->toCol(cc), sizes[i].minS.width(),
+ sizes[i].hint.width(), cStretch, box->hStretch());
+ }
+ }
+
+ for (i = 0; i < rr; i++)
+ rowData[i].expansive = rowData.at(i).expansive || rowData.at(i).stretch > 0;
+ for (i = 0; i < cc; i++)
+ colData[i].expansive = colData.at(i).expansive || colData.at(i).stretch > 0;
+
+ q->getContentsMargins(&leftMargin, &topMargin, &rightMargin, &bottomMargin);
+
+ needRecalc = false;
+}
+
+void QGridLayoutPrivate::addHfwData(QGridBox *box, int width)
+{
+ QVector<QLayoutStruct> &rData = *hfwData;
+ if (box->hasHeightForWidth()) {
+ int hint = box->heightForWidth(width);
+ rData[box->row].sizeHint = qMax(hint, rData.at(box->row).sizeHint);
+ rData[box->row].minimumSize = qMax(hint, rData.at(box->row).minimumSize);
+ } else {
+ QSize hint = box->sizeHint();
+ QSize minS = box->minimumSize();
+ rData[box->row].sizeHint = qMax(hint.height(), rData.at(box->row).sizeHint);
+ rData[box->row].minimumSize = qMax(minS.height(), rData.at(box->row).minimumSize);
+ }
+}
+
+/*
+ Similar to setupLayoutData(), but uses heightForWidth(colData)
+ instead of sizeHint(). Assumes that setupLayoutData() and
+ qGeomCalc(colData) has been called.
+*/
+void QGridLayoutPrivate::setupHfwLayoutData()
+{
+ QVector<QLayoutStruct> &rData = *hfwData;
+ for (int i = 0; i < rr; i++) {
+ rData[i] = rowData.at(i);
+ rData[i].minimumSize = rData[i].sizeHint = rMinHeights.at(i);
+ }
+
+ for (int pass = 0; pass < 2; ++pass) {
+ for (int i = 0; i < things.size(); ++i) {
+ QGridBox *box = things.at(i);
+ int r1 = box->row;
+ int c1 = box->col;
+ int r2 = box->toRow(rr);
+ int c2 = box->toCol(cc);
+ int w = colData.at(c2).pos + colData.at(c2).size - colData.at(c1).pos;
+
+ if (r1 == r2) {
+ if (pass == 0)
+ addHfwData(box, w);
+ } else {
+ if (pass == 0) {
+ initEmptyMultiBox(rData, r1, r2);
+ } else {
+ QSize hint = box->sizeHint();
+ QSize min = box->minimumSize();
+ if (box->hasHeightForWidth()) {
+ int hfwh = box->heightForWidth(w);
+ if (hfwh > hint.height())
+ hint.setHeight(hfwh);
+ if (hfwh > min.height())
+ min.setHeight(hfwh);
+ }
+ distributeMultiBox(rData, r1, r2, min.height(), hint.height(),
+ rStretch, box->vStretch());
+ }
+ }
+ }
+ }
+ for (int i = 0; i < rr; i++)
+ rData[i].expansive = rData.at(i).expansive || rData.at(i).stretch > 0;
+}
+
+void QGridLayoutPrivate::distribute(QRect r, int hSpacing, int vSpacing)
+{
+ Q_Q(QGridLayout);
+ bool visualHReversed = hReversed;
+ QWidget *parent = q->parentWidget();
+ if (parent && parent->isRightToLeft())
+ visualHReversed = !visualHReversed;
+
+ setupLayoutData(hSpacing, vSpacing);
+
+ int left, top, right, bottom;
+ effectiveMargins(&left, &top, &right, &bottom);
+ r.adjust(+left, +top, -right, -bottom);
+
+ qGeomCalc(colData, 0, cc, r.x(), r.width());
+ QVector<QLayoutStruct> *rDataPtr;
+ if (has_hfw) {
+ recalcHFW(r.width());
+ qGeomCalc(*hfwData, 0, rr, r.y(), r.height());
+ rDataPtr = hfwData;
+ } else {
+ qGeomCalc(rowData, 0, rr, r.y(), r.height());
+ rDataPtr = &rowData;
+ }
+ QVector<QLayoutStruct> &rData = *rDataPtr;
+ int i;
+
+ bool reverse = ((r.bottom() > rect.bottom()) || (r.bottom() == rect.bottom()
+ && ((r.right() > rect.right()) != visualHReversed)));
+ int n = things.size();
+ for (i = 0; i < n; ++i) {
+ QGridBox *box = things.at(reverse ? n-i-1 : i);
+ int r2 = box->toRow(rr);
+ int c2 = box->toCol(cc);
+
+ int x = colData.at(box->col).pos;
+ int y = rData.at(box->row).pos;
+ int x2p = colData.at(c2).pos + colData.at(c2).size; // x2+1
+ int y2p = rData.at(r2).pos + rData.at(r2).size; // y2+1
+ int w = x2p - x;
+ int h = y2p - y;
+
+ if (visualHReversed)
+ x = r.left() + r.right() - x - w + 1;
+ if (vReversed)
+ y = r.top() + r.bottom() - y - h + 1;
+
+ box->setGeometry(QRect(x, y, w, h));
+ }
+}
+
+QRect QGridLayoutPrivate::cellRect(int row, int col) const
+{
+ if (row < 0 || row >= rr || col < 0 || col >= cc)
+ return QRect();
+
+ const QVector<QLayoutStruct> *rDataPtr;
+ if (has_hfw && hfwData)
+ rDataPtr = hfwData;
+ else
+ rDataPtr = &rowData;
+ return QRect(colData.at(col).pos, rDataPtr->at(row).pos,
+ colData.at(col).size, rDataPtr->at(row).size);
+}
+
+/*!
+ \class QGridLayout
+
+ \brief The QGridLayout class lays out widgets in a grid.
+
+ \ingroup geomanagement
+
+
+ QGridLayout takes the space made available to it (by its parent
+ layout or by the parentWidget()), divides it up into rows and
+ columns, and puts each widget it manages into the correct cell.
+
+ Columns and rows behave identically; we will discuss columns, but
+ there are equivalent functions for rows.
+
+ Each column has a minimum width and a stretch factor. The minimum
+ width is the greatest of that set using setColumnMinimumWidth() and the
+ minimum width of each widget in that column. The stretch factor is
+ set using setColumnStretch() and determines how much of the available
+ space the column will get over and above its necessary minimum.
+
+ Normally, each managed widget or layout is put into a cell of its
+ own using addWidget(). It is also possible for a widget to occupy
+ multiple cells using the row and column spanning overloads of
+ addItem() and addWidget(). If you do this, QGridLayout will guess
+ how to distribute the size over the columns/rows (based on the
+ stretch factors).
+
+ To remove a widget from a layout, call removeWidget(). Calling
+ QWidget::hide() on a widget also effectively removes the widget
+ from the layout until QWidget::show() is called.
+
+ This illustration shows a fragment of a dialog with a five-column,
+ three-row grid (the grid is shown overlaid in magenta):
+
+ \image gridlayout.png A grid layout
+
+ Columns 0, 2 and 4 in this dialog fragment are made up of a
+ QLabel, a QLineEdit, and a QListBox. Columns 1 and 3 are
+ placeholders made with setColumnMinimumWidth(). Row 0 consists of three
+ QLabel objects, row 1 of three QLineEdit objects and row 2 of
+ three QListBox objects. We used placeholder columns (1 and 3) to
+ get the right amount of space between the columns.
+
+ Note that the columns and rows are not equally wide or tall. If
+ you want two columns to have the same width, you must set their
+ minimum widths and stretch factors to be the same yourself. You do
+ this using setColumnMinimumWidth() and setColumnStretch().
+
+ If the QGridLayout is not the top-level layout (i.e. does not
+ manage all of the widget's area and children), you must add it to
+ its parent layout when you create it, but before you do anything
+ with it. The normal way to add a layout is by calling
+ addLayout() on the parent layout.
+
+ Once you have added your layout you can start putting widgets and
+ other layouts into the cells of your grid layout using
+ addWidget(), addItem(), and addLayout().
+
+ QGridLayout also includes two margin widths:
+ the \l{getContentsMargins()}{contents margin} and the spacing().
+ The contents margin is the width of the reserved space along each
+ of the QGridLayout's four sides. The spacing() is the width of the
+ automatically allocated spacing between neighboring boxes.
+
+ The default contents margin values are provided by the
+ \l{QStyle::pixelMetric()}{style}. The default value Qt styles specify
+ is 9 for child widgets and 11 for windows. The spacing defaults to the same as
+ the margin width for a top-level layout, or to the same as the
+ parent layout.
+
+ \sa QBoxLayout, QStackedLayout, {Layout Management}, {Basic Layouts Example}
+*/
+
+
+/*!
+ Constructs a new QGridLayout with parent widget, \a parent. The
+ layout has one row and one column initially, and will expand when
+ new items are inserted.
+*/
+QGridLayout::QGridLayout(QWidget *parent)
+ : QLayout(*new QGridLayoutPrivate, 0, parent)
+{
+ Q_D(QGridLayout);
+ d->expand(1, 1);
+}
+
+/*!
+ Constructs a new grid layout.
+
+ You must insert this grid into another layout. You can insert
+ widgets and layouts into this layout at any time, but laying out
+ will not be performed before this is inserted into another layout.
+*/
+QGridLayout::QGridLayout()
+ : QLayout(*new QGridLayoutPrivate, 0, 0)
+{
+ Q_D(QGridLayout);
+ d->expand(1, 1);
+}
+
+
+#ifdef QT3_SUPPORT
+/*!
+ \obsolete
+ Constructs a new QGridLayout with \a nRows rows, \a nCols columns
+ and parent widget, \a parent. \a parent may not be 0. The grid
+ layout is called \a name.
+
+ \a margin is the number of pixels between the edge of the widget
+ and its managed children. \a space is the default number of pixels
+ between cells. If \a space is -1, the value of \a margin is used.
+*/
+QGridLayout::QGridLayout(QWidget *parent, int nRows, int nCols, int margin,
+ int space, const char *name)
+ : QLayout(*new QGridLayoutPrivate, 0, parent)
+{
+ Q_D(QGridLayout);
+ d->expand(nRows, nCols);
+ setMargin(margin);
+ setSpacing(space < 0 ? margin : space);
+ setObjectName(QString::fromAscii(name));
+}
+
+/*!
+ \obsolete
+
+ Constructs a new grid with \a nRows rows and \a nCols columns. If
+ \a spacing is -1, this QGridLayout inherits its parent's
+ spacing(); otherwise \a spacing is used. The grid layout is called
+ \a name.
+
+ You must insert this grid into another layout. You can insert
+ widgets and layouts into this layout at any time, but laying out
+ will not be performed before this is inserted into another layout.
+*/
+QGridLayout::QGridLayout(QLayout *parentLayout, int nRows, int nCols,
+ int spacing, const char *name)
+ : QLayout(*new QGridLayoutPrivate, parentLayout, 0)
+{
+ Q_D(QGridLayout);
+ d->expand(nRows, nCols);
+ setSpacing(spacing);
+ setObjectName(QString::fromAscii(name));
+}
+
+/*!
+ \obsolete
+
+ Constructs a new grid with \a nRows rows and \a nCols columns. If
+ \a spacing is -1, this QGridLayout inherits its parent's
+ spacing(); otherwise \a spacing is used. The grid layout is called
+ \a name.
+
+ You must insert this grid into another layout. You can insert
+ widgets and layouts into this layout at any time, but laying out
+ will not be performed before this is inserted into another layout.
+*/
+QGridLayout::QGridLayout(int nRows, int nCols, int spacing, const char *name)
+ : QLayout(*new QGridLayoutPrivate, 0, 0)
+{
+ Q_D(QGridLayout);
+ d->expand(nRows, nCols);
+ setSpacing(spacing);
+ setObjectName(QString::fromAscii(name));
+}
+#endif
+
+
+/*!
+\internal (mostly)
+
+Sets the positioning mode used by addItem(). If \a orient is
+Qt::Horizontal, this layout is expanded to \a n columns, and items
+will be added columns-first. Otherwise it is expanded to \a n rows and
+items will be added rows-first.
+*/
+
+void QGridLayout::setDefaultPositioning(int n, Qt::Orientation orient)
+{
+ Q_D(QGridLayout);
+ if (orient == Qt::Horizontal) {
+ d->expand(1, n);
+ d->addVertical = false;
+ } else {
+ d->expand(n,1);
+ d->addVertical = true;
+ }
+}
+
+
+/*!
+ Destroys the grid layout. Geometry management is terminated if
+ this is a top-level grid.
+
+ The layout's widgets aren't destroyed.
+*/
+QGridLayout::~QGridLayout()
+{
+ Q_D(QGridLayout);
+ d->deleteAll();
+}
+
+/*!
+ \property QGridLayout::horizontalSpacing
+ \brief the spacing between widgets that are laid out side by side
+ \since 4.3
+
+ If no value is explicitly set, the layout's horizontal spacing is
+ inherited from the parent layout, or from the style settings for
+ the parent widget.
+
+ \sa verticalSpacing, QStyle::pixelMetric(), {QStyle::}{PM_LayoutHorizontalSpacing}
+*/
+void QGridLayout::setHorizontalSpacing(int spacing)
+{
+ Q_D(QGridLayout);
+ d->horizontalSpacing = spacing;
+ invalidate();
+}
+
+int QGridLayout::horizontalSpacing() const
+{
+ Q_D(const QGridLayout);
+ if (d->horizontalSpacing >= 0) {
+ return d->horizontalSpacing;
+ } else {
+ return qSmartSpacing(this, QStyle::PM_LayoutHorizontalSpacing);
+ }
+}
+
+/*!
+ \property QGridLayout::verticalSpacing
+ \brief the spacing between widgets that are laid out on top of each other
+ \since 4.3
+
+ If no value is explicitly set, the layout's vertical spacing is
+ inherited from the parent layout, or from the style settings for
+ the parent widget.
+
+ \sa horizontalSpacing, QStyle::pixelMetric(), {QStyle::}{PM_LayoutHorizontalSpacing}
+*/
+void QGridLayout::setVerticalSpacing(int spacing)
+{
+ Q_D(QGridLayout);
+ d->verticalSpacing = spacing;
+ invalidate();
+}
+
+int QGridLayout::verticalSpacing() const
+{
+ Q_D(const QGridLayout);
+ if (d->verticalSpacing >= 0) {
+ return d->verticalSpacing;
+ } else {
+ return qSmartSpacing(this, QStyle::PM_LayoutVerticalSpacing);
+ }
+}
+
+/*!
+ This function sets both the vertical and horizontal spacing to
+ \a spacing.
+
+ \sa setVerticalSpacing(), setHorizontalSpacing()
+*/
+void QGridLayout::setSpacing(int spacing)
+{
+ Q_D(QGridLayout);
+ d->horizontalSpacing = d->verticalSpacing = spacing;
+ invalidate();
+}
+
+/*!
+ If the vertical spacing is equal to the horizontal spacing,
+ this function returns that value; otherwise it return -1.
+
+ \sa setSpacing(), verticalSpacing(), horizontalSpacing()
+*/
+int QGridLayout::spacing() const
+{
+ int hSpacing = horizontalSpacing();
+ if (hSpacing == verticalSpacing()) {
+ return hSpacing;
+ } else {
+ return -1;
+ }
+}
+
+/*!
+ Returns the number of rows in this grid.
+*/
+int QGridLayout::rowCount() const
+{
+ Q_D(const QGridLayout);
+ return d->numRows();
+}
+
+/*!
+ Returns the number of columns in this grid.
+*/
+int QGridLayout::columnCount() const
+{
+ Q_D(const QGridLayout);
+ return d->numCols();
+}
+
+/*!
+ \reimp
+*/
+QSize QGridLayout::sizeHint() const
+{
+ Q_D(const QGridLayout);
+ QSize result(d->sizeHint(horizontalSpacing(), verticalSpacing()));
+ int left, top, right, bottom;
+ d->effectiveMargins(&left, &top, &right, &bottom);
+ result += QSize(left + right, top + bottom);
+ return result;
+}
+
+/*!
+ \reimp
+*/
+QSize QGridLayout::minimumSize() const
+{
+ Q_D(const QGridLayout);
+ QSize result(d->minimumSize(horizontalSpacing(), verticalSpacing()));
+ int left, top, right, bottom;
+ d->effectiveMargins(&left, &top, &right, &bottom);
+ result += QSize(left + right, top + bottom);
+ return result;
+}
+
+/*!
+ \reimp
+*/
+QSize QGridLayout::maximumSize() const
+{
+ Q_D(const QGridLayout);
+
+ QSize s = d->maximumSize(horizontalSpacing(), verticalSpacing());
+ int left, top, right, bottom;
+ d->effectiveMargins(&left, &top, &right, &bottom);
+ s += QSize(left + right, top + bottom);
+ s = s.boundedTo(QSize(QLAYOUTSIZE_MAX, QLAYOUTSIZE_MAX));
+ if (alignment() & Qt::AlignHorizontal_Mask)
+ s.setWidth(QLAYOUTSIZE_MAX);
+ if (alignment() & Qt::AlignVertical_Mask)
+ s.setHeight(QLAYOUTSIZE_MAX);
+ return s;
+}
+
+/*!
+ \reimp
+*/
+bool QGridLayout::hasHeightForWidth() const
+{
+ return ((QGridLayout*)this)->d_func()->hasHeightForWidth(horizontalSpacing(), verticalSpacing());
+}
+
+/*!
+ \reimp
+*/
+int QGridLayout::heightForWidth(int w) const
+{
+ Q_D(const QGridLayout);
+ QGridLayoutPrivate *dat = const_cast<QGridLayoutPrivate *>(d);
+ return dat->heightForWidth(w, horizontalSpacing(), verticalSpacing());
+}
+
+/*!
+ \reimp
+*/
+int QGridLayout::minimumHeightForWidth(int w) const
+{
+ Q_D(const QGridLayout);
+ QGridLayoutPrivate *dat = const_cast<QGridLayoutPrivate *>(d);
+ return dat->minimumHeightForWidth(w, horizontalSpacing(), verticalSpacing());
+}
+
+#ifdef QT3_SUPPORT
+/*!
+ \compat
+
+ Searches for widget \a w in this layout (not including child
+ layouts). If \a w is found, it sets \c{*}\a{row} and
+ \c{*}\a{column} to the row and column that the widget
+ occupies and returns true; otherwise returns false.
+
+ If the widget spans multiple rows/columns, the top-left cell
+ is returned.
+
+ Use indexOf() and getItemPosition() instead.
+*/
+bool QGridLayout::findWidget(QWidget* w, int *row, int *column)
+{
+ Q_D(QGridLayout);
+ int index = indexOf(w);
+ if (index < 0)
+ return false;
+ int dummy1, dummy2;
+ d->getItemPosition(index, row, column, &dummy1, &dummy2);
+ return true;
+}
+#endif
+/*!
+ \reimp
+*/
+int QGridLayout::count() const
+{
+ Q_D(const QGridLayout);
+ return d->count();
+}
+
+
+/*!
+ \reimp
+*/
+QLayoutItem *QGridLayout::itemAt(int index) const
+{
+ Q_D(const QGridLayout);
+ return d->itemAt(index);
+}
+
+/*!
+ \since 4.4
+
+ Returns the layout item that occupies cell (\a row, \a column), or 0 if
+ the cell is empty.
+
+ \sa getItemPosition(), indexOf()
+*/
+QLayoutItem *QGridLayout::itemAtPosition(int row, int column) const
+{
+ Q_D(const QGridLayout);
+ int n = d->things.count();
+ for (int i = 0; i < n; ++i) {
+ QGridBox *box = d->things.at(i);
+ if (row >= box->row && row <= box->toRow(d->rr)
+ && column >= box->col && column <= box->toCol(d->cc)) {
+ return box->item();
+ }
+ }
+ return 0;
+}
+
+/*!
+ \reimp
+*/
+QLayoutItem *QGridLayout::takeAt(int index)
+{
+ Q_D(QGridLayout);
+ return d->takeAt(index);
+}
+
+/*!
+ Returns the position information of the item with the given \a index.
+
+ The variables passed as \a row and \a column are updated with the position of the
+ item in the layout, and the \a rowSpan and \a columnSpan variables are updated
+ with the vertical and horizontal spans of the item.
+
+ \sa itemAtPosition(), itemAt()
+*/
+void QGridLayout::getItemPosition(int index, int *row, int *column, int *rowSpan, int *columnSpan)
+{
+ Q_D(QGridLayout);
+ d->getItemPosition(index, row, column, rowSpan, columnSpan);
+}
+
+
+/*!
+ \reimp
+*/
+void QGridLayout::setGeometry(const QRect &rect)
+{
+ Q_D(QGridLayout);
+ if (d->isDirty() || rect != geometry()) {
+ QRect cr = alignment() ? alignmentRect(rect) : rect;
+ d->distribute(cr, horizontalSpacing(), verticalSpacing());
+ QLayout::setGeometry(rect);
+ }
+}
+
+/*!
+ Returns the geometry of the cell with row \a row and column \a column
+ in the grid. Returns an invalid rectangle if \a row or \a column is
+ outside the grid.
+
+ \warning in the current version of Qt this function does not
+ return valid results until setGeometry() has been called, i.e.
+ after the parentWidget() is visible.
+*/
+QRect QGridLayout::cellRect(int row, int column) const
+{
+ Q_D(const QGridLayout);
+ return d->cellRect(row, column);
+}
+#ifdef QT3_SUPPORT
+/*!
+ \obsolete
+ Expands this grid so that it will have \a nRows rows and \a nCols
+ columns. Will not shrink the grid. You should not need to call
+ this function because QGridLayout expands automatically as new
+ items are inserted.
+*/
+void QGridLayout::expand(int nRows, int nCols)
+{
+ Q_D(QGridLayout);
+ d->expand(nRows, nCols);
+}
+#endif
+
+/*!
+ \reimp
+*/
+void QGridLayout::addItem(QLayoutItem *item)
+{
+ Q_D(QGridLayout);
+ int r, c;
+ d->getNextPos(r, c);
+ addItem(item, r, c);
+}
+
+/*!
+ Adds \a item at position \a row, \a column, spanning \a rowSpan
+ rows and \a columnSpan columns, and aligns it according to \a
+ alignment. If \a rowSpan and/or \a columnSpan is -1, then the item
+ will extend to the bottom and/or right edge, respectively. The
+ layout takes ownership of the \a item.
+
+ \warning Do not use this function to add child layouts or child
+ widget items. Use addLayout() or addWidget() instead.
+*/
+void QGridLayout::addItem(QLayoutItem *item, int row, int column, int rowSpan, int columnSpan, Qt::Alignment alignment)
+{
+ Q_D(QGridLayout);
+ QGridBox *b = new QGridBox(item);
+ b->setAlignment(alignment);
+ d->add(b, row, (rowSpan < 0) ? -1 : row + rowSpan - 1, column, (columnSpan < 0) ? -1 : column + columnSpan - 1);
+ invalidate();
+}
+
+/*
+ Returns true if the widget \a w can be added to the layout \a l;
+ otherwise returns false.
+*/
+static bool checkWidget(QLayout *l, QWidget *w)
+{
+ if (!w) {
+ qWarning("QLayout: Cannot add null widget to %s/%s", l->metaObject()->className(),
+ l->objectName().toLocal8Bit().data());
+ return false;
+ }
+ return true;
+}
+
+/*!
+ Adds the given \a widget to the cell grid at \a row, \a column. The
+ top-left position is (0, 0) by default.
+
+ The alignment is specified by \a alignment. The default
+ alignment is 0, which means that the widget fills the entire cell.
+
+*/
+void QGridLayout::addWidget(QWidget *widget, int row, int column, Qt::Alignment alignment)
+{
+ if (!checkWidget(this, widget))
+ return;
+ if (row < 0 || column < 0) {
+ qWarning("QGridLayout: Cannot add %s/%s to %s/%s at row %d column %d",
+ widget->metaObject()->className(), widget->objectName().toLocal8Bit().data(),
+ metaObject()->className(), objectName().toLocal8Bit().data(), row, column);
+ return;
+ }
+ addChildWidget(widget);
+ QWidgetItem *b = QLayoutPrivate::createWidgetItem(this, widget);
+ addItem(b, row, column, 1, 1, alignment);
+}
+
+/*!
+ \overload
+
+ This version adds the given \a widget to the cell grid, spanning
+ multiple rows/columns. The cell will start at \a fromRow, \a
+ fromColumn spanning \a rowSpan rows and \a columnSpan columns. The
+ \a widget will have the given \a alignment.
+
+ If \a rowSpan and/or \a columnSpan is -1, then the widget will
+ extend to the bottom and/or right edge, respectively.
+
+*/
+void QGridLayout::addWidget(QWidget *widget, int fromRow, int fromColumn,
+ int rowSpan, int columnSpan, Qt::Alignment alignment)
+{
+ Q_D(QGridLayout);
+ if (!checkWidget(this, widget))
+ return;
+ int toRow = (rowSpan < 0) ? -1 : fromRow + rowSpan - 1;
+ int toColumn = (columnSpan < 0) ? -1 : fromColumn + columnSpan - 1;
+ addChildWidget(widget);
+ QGridBox *b = new QGridBox(this, widget);
+ b->setAlignment(alignment);
+ d->add(b, fromRow, toRow, fromColumn, toColumn);
+ invalidate();
+}
+
+/*!
+ \fn void QGridLayout::addWidget(QWidget *widget)
+
+ \overload
+ \internal
+*/
+
+/*!
+ Places the \a layout at position (\a row, \a column) in the grid. The
+ top-left position is (0, 0).
+
+ The alignment is specified by \a alignment. The default
+ alignment is 0, which means that the widget fills the entire cell.
+
+ A non-zero alignment indicates that the layout should not grow to
+ fill the available space but should be sized according to
+ sizeHint().
+
+
+ \a layout becomes a child of the grid layout.
+*/
+void QGridLayout::addLayout(QLayout *layout, int row, int column, Qt::Alignment alignment)
+{
+ Q_D(QGridLayout);
+ addChildLayout(layout);
+ QGridBox *b = new QGridBox(layout);
+ b->setAlignment(alignment);
+ d->add(b, row, column);
+}
+
+/*!
+ \overload
+ This version adds the layout \a layout to the cell grid, spanning multiple
+ rows/columns. The cell will start at \a row, \a column spanning \a
+ rowSpan rows and \a columnSpan columns.
+
+ If \a rowSpan and/or \a columnSpan is -1, then the layout will extend to the bottom
+ and/or right edge, respectively.
+*/
+void QGridLayout::addLayout(QLayout *layout, int row, int column,
+ int rowSpan, int columnSpan, Qt::Alignment alignment)
+{
+ Q_D(QGridLayout);
+ addChildLayout(layout);
+ QGridBox *b = new QGridBox(layout);
+ b->setAlignment(alignment);
+ d->add(b, row, (rowSpan < 0) ? -1 : row + rowSpan - 1, column, (columnSpan < 0) ? -1 : column + columnSpan - 1);
+}
+
+/*!
+ Sets the stretch factor of row \a row to \a stretch. The first row
+ is number 0.
+
+ The stretch factor is relative to the other rows in this grid.
+ Rows with a higher stretch factor take more of the available
+ space.
+
+ The default stretch factor is 0. If the stretch factor is 0 and no
+ other row in this table can grow at all, the row may still grow.
+
+ \sa rowStretch(), setRowMinimumHeight(), setColumnStretch()
+*/
+void QGridLayout::setRowStretch(int row, int stretch)
+{
+ Q_D(QGridLayout);
+ d->setRowStretch(row, stretch);
+ invalidate();
+}
+
+/*!
+ Returns the stretch factor for row \a row.
+
+ \sa setRowStretch()
+*/
+int QGridLayout::rowStretch(int row) const
+{
+ Q_D(const QGridLayout);
+ return d->rowStretch(row);
+}
+
+/*!
+ Returns the stretch factor for column \a column.
+
+ \sa setColumnStretch()
+*/
+int QGridLayout::columnStretch(int column) const
+{
+ Q_D(const QGridLayout);
+ return d->colStretch(column);
+}
+
+/*!
+ Sets the stretch factor of column \a column to \a stretch. The first
+ column is number 0.
+
+ The stretch factor is relative to the other columns in this grid.
+ Columns with a higher stretch factor take more of the available
+ space.
+
+ The default stretch factor is 0. If the stretch factor is 0 and no
+ other column in this table can grow at all, the column may still
+ grow.
+
+ An alternative approach is to add spacing using addItem() with a
+ QSpacerItem.
+
+ \sa columnStretch(), setRowStretch()
+*/
+void QGridLayout::setColumnStretch(int column, int stretch)
+{
+ Q_D(QGridLayout);
+ d->setColStretch(column, stretch);
+ invalidate();
+}
+
+
+
+/*!
+ Sets the minimum height of row \a row to \a minSize pixels.
+
+ \sa rowMinimumHeight(), setColumnMinimumWidth()
+*/
+void QGridLayout::setRowMinimumHeight(int row, int minSize)
+{
+ Q_D(QGridLayout);
+ d->setRowMinimumHeight(row, minSize);
+ invalidate();
+}
+
+/*!
+ Returns the minimum width set for row \a row.
+
+ \sa setRowMinimumHeight()
+*/
+int QGridLayout::rowMinimumHeight(int row) const
+{
+ Q_D(const QGridLayout);
+ return d->rowSpacing(row);
+}
+
+/*!
+ Sets the minimum width of column \a column to \a minSize pixels.
+
+ \sa columnMinimumWidth(), setRowMinimumHeight()
+*/
+void QGridLayout::setColumnMinimumWidth(int column, int minSize)
+{
+ Q_D(QGridLayout);
+ d->setColumnMinimumWidth(column, minSize);
+ invalidate();
+}
+
+/*!
+ Returns the column spacing for column \a column.
+
+ \sa setColumnMinimumWidth()
+*/
+int QGridLayout::columnMinimumWidth(int column) const
+{
+ Q_D(const QGridLayout);
+ return d->colSpacing(column);
+}
+
+/*!
+ \reimp
+*/
+Qt::Orientations QGridLayout::expandingDirections() const
+{
+ Q_D(const QGridLayout);
+ return d->expandingDirections(horizontalSpacing(), verticalSpacing());
+}
+
+/*!
+ Sets the grid's origin corner, i.e. position (0, 0), to \a corner.
+*/
+void QGridLayout::setOriginCorner(Qt::Corner corner)
+{
+ Q_D(QGridLayout);
+ d->setReversed(corner == Qt::BottomLeftCorner || corner == Qt::BottomRightCorner,
+ corner == Qt::TopRightCorner || corner == Qt::BottomRightCorner);
+}
+
+/*!
+ Returns the corner that's used for the grid's origin, i.e. for
+ position (0, 0).
+*/
+Qt::Corner QGridLayout::originCorner() const
+{
+ Q_D(const QGridLayout);
+ if (d->horReversed()) {
+ return d->verReversed() ? Qt::BottomRightCorner : Qt::TopRightCorner;
+ } else {
+ return d->verReversed() ? Qt::BottomLeftCorner : Qt::TopLeftCorner;
+ }
+}
+
+/*!
+ \reimp
+*/
+void QGridLayout::invalidate()
+{
+ Q_D(QGridLayout);
+ d->setDirty();
+ QLayout::invalidate();
+}
+
+/*!
+ \fn void QGridLayout::addRowSpacing(int row, int minsize)
+
+ Use addItem(new QSpacerItem(0, minsize), row, 0) instead.
+*/
+
+/*!
+ \fn void QGridLayout::addColSpacing(int col, int minsize)
+
+ Use addItem(new QSpacerItem(minsize, 0), 0, col) instead.
+*/
+
+/*!
+ \fn void QGridLayout::addMultiCellWidget(QWidget *widget, int fromRow, int toRow, int fromCol, int toCol, Qt::Alignment align = 0)
+
+ Use an addWidget() overload that allows you to specify row and
+ column spans instead.
+*/
+
+/*!
+ \fn void QGridLayout::addMultiCell(QLayoutItem *l, int fromRow, int toRow, int fromCol, int toCol, Qt::Alignment align = 0)
+
+ Use an addItem() overload that allows you to specify row and
+ column spans instead.
+*/
+
+/*!
+ \fn void QGridLayout::addMultiCellLayout(QLayout *layout, int fromRow, int toRow, int fromCol, int toCol, Qt::Alignment align = 0)
+
+ Use an addLayout() overload that allows you to specify row and
+ column spans instead.
+*/
+
+/*!
+ \fn int QGridLayout::numRows() const
+
+ Use rowCount() instead.
+*/
+
+/*!
+ \fn int QGridLayout::numCols() const
+
+ Use columnCount() instead.
+*/
+
+/*!
+ \fn void QGridLayout::setColStretch(int col, int stretch)
+
+ Use setColumnStretch() instead.
+*/
+
+/*!
+ \fn int QGridLayout::colStretch(int col) const
+
+ Use columnStretch() instead.
+*/
+
+/*!
+ \fn void QGridLayout::setColSpacing(int col, int minSize)
+
+ Use setColumnMinimumWidth() instead.
+*/
+
+/*!
+ \fn int QGridLayout::colSpacing(int col) const
+
+ Use columnSpacing() instead.
+*/
+
+/*!
+ \fn void QGridLayout::setRowSpacing(int row, int minSize)
+
+ Use setRowMinimumHeight(\a row, \a minSize) instead.
+*/
+
+/*!
+ \fn int QGridLayout::rowSpacing(int row) const
+
+ Use rowMinimumHeight(\a row) instead.
+*/
+
+/*!
+ \fn QRect QGridLayout::cellGeometry(int row, int column) const
+
+ Use cellRect(\a row, \a column) instead.
+*/
+
+/*!
+ \fn void QGridLayout::setOrigin(Qt::Corner corner)
+
+ Use setOriginCorner(\a corner) instead.
+*/
+
+/*!
+ \fn Qt::Corner QGridLayout::origin() const
+
+ Use originCorner() instead.
+*/
+
+
+QT_END_NAMESPACE