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canvas::BoxLayout: set stretch factor by item.

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This commit is contained in:
Thomas Geymayer 2014-07-16 19:24:41 +02:00
parent a5e99ea996
commit 9709cfe20d
3 changed files with 35 additions and 0 deletions
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18
simgear/canvas/layout/BoxLayout.cxx
View File

@ -152,6 +152,24 @@ namespace canvas
invalidate();
}
//----------------------------------------------------------------------------
bool BoxLayout::setStretchFactor(const LayoutItemRef& item, int stretch)
{
for( LayoutItems::iterator it = _layout_items.begin();
it != _layout_items.end();
++it )
{
if( item == it->layout_item )
{
it->stretch = std::max(0, stretch);
invalidate();
return true;
}
}
return false;
}
//----------------------------------------------------------------------------
int BoxLayout::stretch(size_t index) const
{

8
simgear/canvas/layout/BoxLayout.hxx
View File

@ -66,6 +66,14 @@ namespace canvas
*/
void setStretch(size_t index, int stretch);
/**
* Set the stretch factor of the given @a item to @a stretch, if it exists
* in this layout.
*
* @return true, if the @a item was found in the layout
*/
bool setStretchFactor(const LayoutItemRef& item, int stretch);
/**
* Get the stretch factor of the item at position @a index
*/

9
simgear/canvas/layout/canvas_layout_test.cxx
View File

@ -216,6 +216,15 @@ BOOST_AUTO_TEST_CASE( horizontal_layout )
BOOST_CHECK_EQUAL(w1->geometry(), SGRecti(0, 0, 125, 32));
BOOST_CHECK_EQUAL(w2->geometry(), SGRecti(130, 0, 126, 32));
BOOST_REQUIRE( hbox.setStretchFactor(w1, 2) );
BOOST_REQUIRE( hbox.setStretchFactor(w2, 3) );
BOOST_CHECK_EQUAL(hbox.stretch(0), 2);
BOOST_CHECK_EQUAL(hbox.stretch(1), 3);
hbox.removeItem(w1);
BOOST_CHECK( !hbox.setStretchFactor(w1, 0) );
}
}