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2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
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11 * http://www.apache.org/licenses/LICENSE-2.0
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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