xref: /aoo42x/main/toolkit/source/layout/core/flow.cxx (revision b0724fc6)
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21 
22 
23 
24 #include "flow.hxx"
25 
26 #include <sal/macros.h>
27 
28 namespace layoutimpl
29 {
30 
31 using namespace css;
32 
isVisible()33 bool Flow::ChildData::isVisible()
34 {
35     return xChild.is();
36 }
37 
Flow()38 Flow::Flow()
39     : Container()
40     , mnSpacing( 0 )
41     , mbHomogeneous( false )
42 {
43     addProp( RTL_CONSTASCII_USTRINGPARAM( "Homogeneous" ),
44              ::getCppuType( static_cast< const sal_Bool* >( NULL ) ),
45              &mbHomogeneous );
46     addProp( RTL_CONSTASCII_USTRINGPARAM( "Spacing" ),
47              ::getCppuType( static_cast< const sal_Int32* >( NULL ) ),
48              &mnSpacing );
49 }
50 
51 bool
emptyVisible()52 Flow::emptyVisible ()
53 {
54     return true;
55 }
56 
57 void SAL_CALL
addChild(const uno::Reference<awt::XLayoutConstrains> & xChild)58 Flow::addChild( const uno::Reference< awt::XLayoutConstrains >& xChild )
59     throw (uno::RuntimeException, css::awt::MaxChildrenException)
60 {
61     if ( xChild.is() )
62     {
63         ChildData *pData = new ChildData();
64         pData->xChild = xChild;
65         maChildren.push_back( pData );
66 
67         setChildParent( xChild );
68         queueResize();
69     }
70 }
71 
72 void SAL_CALL
removeChild(const css::uno::Reference<css::awt::XLayoutConstrains> & xChild)73 Flow::removeChild( const css::uno::Reference< css::awt::XLayoutConstrains >& xChild )
74     throw (css::uno::RuntimeException)
75 {
76     for ( std::list< ChildData * >::iterator it = maChildren.begin();
77           it != maChildren.end(); it++ )
78     {
79         if ( (*it)->xChild == xChild )
80         {
81             delete *it;
82             maChildren.erase( it );
83 
84             unsetChildParent( xChild );
85             queueResize();
86             break;
87         }
88     }
89 }
90 
91 css::uno::Sequence< css::uno::Reference < css::awt::XLayoutConstrains > > SAL_CALL
getChildren()92 Flow::getChildren()
93     throw (css::uno::RuntimeException)
94 {
95     uno::Sequence< uno::Reference< awt::XLayoutConstrains > > children( maChildren.size() );
96     unsigned int i = 0;
97     for ( std::list< ChildData * >::iterator it = maChildren.begin();
98           it != maChildren.end(); it++, i++ )
99         children[i] = (*it)->xChild;
100 
101     return children;
102 }
103 
104 uno::Reference< beans::XPropertySet > SAL_CALL
getChildProperties(const uno::Reference<awt::XLayoutConstrains> &)105 Flow::getChildProperties( const uno::Reference< awt::XLayoutConstrains >& /*xChild*/ )
106     throw (uno::RuntimeException)
107 {
108     return uno::Reference< beans::XPropertySet >();
109 }
110 
111 css::awt::Size
calculateSize(long nMaxWidth)112 Flow::calculateSize( long nMaxWidth )
113 {
114     long nNeedHeight = 0;
115 
116     std::list<ChildData *>::const_iterator it;
117     mnEachWidth = 0;
118     // first pass, for homogeneous property
119     for (it = maChildren.begin(); it != maChildren.end(); it++)
120     {
121         if ( !(*it)->isVisible() )
122             continue;
123         (*it)->aRequisition = (*it)->xChild->getMinimumSize();
124         if ( mbHomogeneous )
125             mnEachWidth = SAL_MAX( mnEachWidth, (*it)->aRequisition.Width );
126     }
127 
128     long nRowWidth = 0, nRowHeight = 0;
129     for (it = maChildren.begin(); it != maChildren.end(); it++)
130     {
131         if ( !(*it)->isVisible() )
132             continue;
133 
134         awt::Size aChildSize = (*it)->aRequisition;
135         if ( mbHomogeneous )
136             aChildSize.Width = mnEachWidth;
137 
138         if ( nMaxWidth && nRowWidth > 0 && nRowWidth + aChildSize.Width > nMaxWidth )
139         {
140             nRowWidth = 0;
141             nNeedHeight += nRowHeight;
142             nRowHeight = 0;
143         }
144         nRowHeight = SAL_MAX( nRowHeight, aChildSize.Height );
145         nRowWidth += aChildSize.Width;
146     }
147     nNeedHeight += nRowHeight;
148 
149     return awt::Size( nRowWidth, nNeedHeight );
150 }
151 
152 awt::Size SAL_CALL
getMinimumSize()153 Flow::getMinimumSize() throw(uno::RuntimeException)
154 {
155     return maRequisition = calculateSize( 0 );
156 }
157 
158 sal_Bool SAL_CALL
hasHeightForWidth()159 Flow::hasHeightForWidth()
160     throw(css::uno::RuntimeException)
161 {
162     return true;
163 }
164 
165 sal_Int32 SAL_CALL
getHeightForWidth(sal_Int32 nWidth)166 Flow::getHeightForWidth( sal_Int32 nWidth )
167     throw(css::uno::RuntimeException)
168 {
169     return calculateSize( nWidth ).Height;
170 }
171 
172 void SAL_CALL
allocateArea(const css::awt::Rectangle & rArea)173 Flow::allocateArea( const css::awt::Rectangle &rArea )
174     throw (css::uno::RuntimeException)
175 {
176     maAllocation = rArea;
177 
178     std::list<ChildData *>::const_iterator it;
179     long nX = 0, nY = 0, nRowHeight = 0;
180     for (it = maChildren.begin(); it != maChildren.end(); it++)
181     {
182         ChildData *child = *it;
183         if ( !child->isVisible() )
184             continue;
185 
186         awt::Size aChildSize( child->aRequisition );
187         if ( mbHomogeneous )
188             aChildSize.Width = mnEachWidth;
189 
190         if ( nX > 0 && nX + aChildSize.Width > rArea.Width )
191         {
192             nX = 0;
193             nY += nRowHeight;
194             nRowHeight = 0;
195         }
196         nRowHeight = SAL_MAX( nRowHeight, aChildSize.Height );
197 
198         allocateChildAt( child->xChild,
199                          awt::Rectangle( rArea.X + nX, rArea.Y + nY, aChildSize.Width, aChildSize.Height ) );
200 
201         nX += aChildSize.Width;
202     }
203 }
204 
205 } // namespace layoutimpl
206