qgridlayout.cpp File Reference

#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"

Go to the source code of this file.

Classes
class	QGridBox
class	QGridLayoutPrivate
struct	QGridLayoutSizeTriple

Functions
static bool	checkWidget (QLayout *l, QWidget *w)
static void	distributeMultiBox (QVector< QLayoutStruct > &chain, int start, int end, int minSize, int sizeHint, QVector< int > &stretchArray, int stretch)
static QGridBox *&	gridAt (QGridBox *grid[], int r, int c, int cc, Qt::Orientation orientation=Qt::Vertical)
static void	initEmptyMultiBox (QVector< QLayoutStruct > &chain, int start, int end)

Function Documentation

checkWidget()

static bool checkWidget ( QLayout *  l, QWidget *  w  )

static

Definition at line 1552 of file qgridlayout.cpp.

Referenced by QGridLayout::addWidget().

{
    if (!w) {
        qWarning("QLayout: Cannot add null widget to %s/%s", l->metaObject()->className(),
                  l->objectName().toLocal8Bit().data());
        return false;
    }
    return true;
}

distributeMultiBox()

static void distributeMultiBox ( QVector< QLayoutStruct > &  chain, int  start, int  end, int  minSize, int  sizeHint, QVector< int > &  stretchArray, int  stretch  )

static

Definition at line 617 of file qgridlayout.cpp.

Referenced by QGridLayoutPrivate::setupHfwLayoutData(), and QGridLayoutPrivate::setupLayoutData().

{
    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;
        }
    }
}

gridAt()

static QGridBox*& gridAt ( QGridBox *  grid[], int  r, int  c, int  cc, Qt::Orientation  orientation = Qt::Vertical  )

static

Definition at line 682 of file qgridlayout.cpp.

Referenced by QGridLayoutPrivate::setupLayoutData(), and QGridLayoutPrivate::setupSpacings().

{
    if (orientation == Qt::Horizontal)
        qSwap(r, c);
    return grid[(r * cc) + c];
}

initEmptyMultiBox()

static void initEmptyMultiBox ( QVector< QLayoutStruct > &  chain, int  start, int  end  )

static

Definition at line 607 of file qgridlayout.cpp.

Referenced by QGridLayoutPrivate::setupHfwLayoutData(), and QGridLayoutPrivate::setupLayoutData().

{
    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;
    }
}