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| author | Geir Vattekar <geir.vattekar@trolltech.com> | 2009-05-15 13:23:00 (GMT) |
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| committer | Geir Vattekar <geir.vattekar@trolltech.com> | 2009-05-15 13:23:00 (GMT) |
| commit | fe7040348d82c5e5d302e7ec674fc0e3f68f06e1 (patch) | |
| tree | 6b40b8c1e69a044aebd23f7b137d9abb4720b5e8 /doc/src/layout.qdoc | |
| parent | a830e5f22a42d00b0b92544cfcb56c79b2c3b6cd (diff) | |
| parent | 3875cd2b0a81c190939ea2803a2efbe890ae38ec (diff) | |
| download | Qt-fe7040348d82c5e5d302e7ec674fc0e3f68f06e1.zip Qt-fe7040348d82c5e5d302e7ec674fc0e3f68f06e1.tar.gz Qt-fe7040348d82c5e5d302e7ec674fc0e3f68f06e1.tar.bz2 | |
Merge branch '4.5' of git@scm.dev.nokia.troll.no:qt/qt into 4.5
Diffstat (limited to 'doc/src/layout.qdoc')
| -rw-r--r-- | doc/src/layout.qdoc | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/doc/src/layout.qdoc b/doc/src/layout.qdoc index 55dfd8b..d97fcfc 100644 --- a/doc/src/layout.qdoc +++ b/doc/src/layout.qdoc @@ -315,7 +315,11 @@ \snippet doc/src/snippets/code/doc_src_layout.qdoc 1 - First we define two functions that iterate over the layout: \c{itemAt()} + First we define \c{count()} to fetch the number of items in the list. + + \snippet doc/src/snippets/code/doc_src_layout.qdoc 2 + + Then we define two functions that iterate over the layout: \c{itemAt()} and \c{takeAt()}. These functions are used internally by the layout system to handle deletion of widgets. They are also available for application programmers. @@ -326,7 +330,7 @@ structure, we may have to spend more effort defining a linear order for the items. - \snippet doc/src/snippets/code/doc_src_layout.qdoc 2 + \snippet doc/src/snippets/code/doc_src_layout.qdoc 3 \c{addItem()} implements the default placement strategy for layout items. This function must be implemented. It is used by QLayout::add(), by the @@ -336,26 +340,26 @@ QGridLayout::addItem(), QGridLayout::addWidget(), and QGridLayout::addLayout(). - \snippet doc/src/snippets/code/doc_src_layout.qdoc 3 + \snippet doc/src/snippets/code/doc_src_layout.qdoc 4 The layout takes over responsibility of the items added. Since QLayoutItem - does not inherit QObject, we must delete the items manually. The function - QLayout::deleteAllItems() uses \c{takeAt()} defined above to delete all the - items in the layout. + does not inherit QObject, we must delete the items manually. In the + destructor, we remove each item from the list using \c{takeAt()}, and + then delete it. - \snippet doc/src/snippets/code/doc_src_layout.qdoc 4 + \snippet doc/src/snippets/code/doc_src_layout.qdoc 5 The \c{setGeometry()} function actually performs the layout. The rectangle supplied as an argument does not include \c{margin()}. If relevant, use \c{spacing()} as the distance between items. - \snippet doc/src/snippets/code/doc_src_layout.qdoc 5 + \snippet doc/src/snippets/code/doc_src_layout.qdoc 6 \c{sizeHint()} and \c{minimumSize()} are normally very similar in implementation. The sizes returned by both functions should include \c{spacing()}, but not \c{margin()}. - \snippet doc/src/snippets/code/doc_src_layout.qdoc 6 + \snippet doc/src/snippets/code/doc_src_layout.qdoc 7 \section2 Further Notes |