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    41 

    42 #include <QtGui>

    43 

    44 #include "borderlayout.h"

    45 

    46 BorderLayout::BorderLayout(QWidget *parent, int margin, int spacing)

    47     : QLayout(parent)

    48 {

    49     setMargin(margin);

    50     setSpacing(spacing);

    51 }

    52 

    53 BorderLayout::BorderLayout(int spacing)

    54 {

    55     setSpacing(spacing);

    56 }

    57 

    58 

    59 BorderLayout::~BorderLayout()

    60 {

    61     QLayoutItem *l;

    62     while ((l = takeAt(0)))

    63         delete l;

    64 }

    65 

    66 void BorderLayout::addItem(QLayoutItem *item)

    67 {

    68     add(item, West);

    69 }

    70 

    71 void BorderLayout::addWidget(QWidget *widget, Position position)

    72 {

    73     add(new QWidgetItem(widget), position);

    74 }

    75 

    76 Qt::Orientations BorderLayout::expandingDirections() const

    77 {

    78     return Qt::Horizontal | Qt::Vertical;

    79 }

    80 

    81 bool BorderLayout::hasHeightForWidth() const

    82 {

    83     return false;

    84 }

    85 

    86 int BorderLayout::count() const

    87 {

    88     return list.size();

    89 }

    90 

    91 QLayoutItem *BorderLayout::itemAt(int index) const

    92 {

    93     ItemWrapper *wrapper = list.value(index);

    94     if (wrapper)

    95         return wrapper->item;

    96     else

    97         return 0;

    98 }

    99 

   100 QSize BorderLayout::minimumSize() const

   101 {

   102     return calculateSize(MinimumSize);

   103 }

   104 

   105 void BorderLayout::setGeometry(const QRect &rect)

   106 {

   107     ItemWrapper *center = 0;

   108     int eastWidth = 0;

   109     int westWidth = 0;

   110     int northHeight = 0;

   111     int southHeight = 0;

   112     int centerHeight = 0;

   113     int i;

   114 

   115     QLayout::setGeometry(rect);

   116 

   117     for (i = 0; i < list.size(); ++i) {

   118         ItemWrapper *wrapper = list.at(i);

   119         QLayoutItem *item = wrapper->item;

   120         Position position = wrapper->position;

   121 

   122         if (position == North) {

   123             item->setGeometry(QRect(rect.x(), northHeight, rect.width(),

   124                                     item->sizeHint().height()));

   125 

   126             northHeight += item->geometry().height() + spacing();

   127         } else if (position == South) {

   128             item->setGeometry(QRect(item->geometry().x(),

   129                                     item->geometry().y(), rect.width(),

   130                                     item->sizeHint().height()));

   131 

   132             southHeight += item->geometry().height() + spacing();

   133 

   134             item->setGeometry(QRect(rect.x(),

   135                               rect.y() + rect.height() - southHeight + spacing(),

   136                               item->geometry().width(),

   137                               item->geometry().height()));

   138         } else if (position == Center) {

   139             center = wrapper;

   140         }

   141     }

   142 

   143     centerHeight = rect.height() - northHeight - southHeight;

   144 

   145     for (i = 0; i < list.size(); ++i) {

   146         ItemWrapper *wrapper = list.at(i);

   147         QLayoutItem *item = wrapper->item;

   148         Position position = wrapper->position;

   149 

   150         if (position == West) {

   151             item->setGeometry(QRect(rect.x() + westWidth, northHeight,

   152                                     item->sizeHint().width(), centerHeight));

   153 

   154             westWidth += item->geometry().width() + spacing();

   155         } else if (position == East) {

   156             item->setGeometry(QRect(item->geometry().x(), item->geometry().y(),

   157                                     item->sizeHint().width(), centerHeight));

   158 

   159             eastWidth += item->geometry().width() + spacing();

   160 

   161             item->setGeometry(QRect(

   162                               rect.x() + rect.width() - eastWidth + spacing(),

   163                               northHeight, item->geometry().width(),

   164                               item->geometry().height()));

   165         }

   166     }

   167 

   168     if (center)

   169         center->item->setGeometry(QRect(westWidth, northHeight,

   170                                         rect.width() - eastWidth - westWidth,

   171                                         centerHeight));

   172 }

   173 

   174 QSize BorderLayout::sizeHint() const

   175 {

   176     return calculateSize(SizeHint);

   177 }

   178 

   179 QLayoutItem *BorderLayout::takeAt(int index)

   180 {

   181     if (index >= 0 && index < list.size()) {

   182         ItemWrapper *layoutStruct = list.takeAt(index);

   183         return layoutStruct->item;

   184     }

   185     return 0;

   186 }

   187 

   188 void BorderLayout::add(QLayoutItem *item, Position position)

   189 {

   190     list.append(new ItemWrapper(item, position));

   191 }

   192 

   193 QSize BorderLayout::calculateSize(SizeType sizeType) const

   194 {

   195     QSize totalSize;

   196 

   197     for (int i = 0; i < list.size(); ++i) {

   198         ItemWrapper *wrapper = list.at(i);

   199         Position position = wrapper->position;

   200         QSize itemSize;

   201 

   202         if (sizeType == MinimumSize)

   203             itemSize = wrapper->item->minimumSize();

   204         else // (sizeType == SizeHint)

   205             itemSize = wrapper->item->sizeHint();

   206 

   207         if (position == North || position == South || position == Center)

   208             totalSize.rheight() += itemSize.height();

   209 

   210         if (position == West || position == East || position == Center)

   211             totalSize.rwidth() += itemSize.width();

   212     }

   213     return totalSize;

   214 }