1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include "tabbargeometry.hxx"
#include <basegfx/range/b2drange.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <vcl/window.hxx>
#include <algorithm>
// the width (or height, depending on alignment) of the scroll buttons
#define BUTTON_FLOW_WIDTH 20
// the space between the scroll buttons and the items
#define BUTTON_FLOW_SPACE 2
// outer space to apply between the tab bar borders and any content. Note that those refer to a "normalized" geometry,
// i.e. if the tab bar were aligned at the top
#define OUTER_SPACE_LEFT 2
#define OUTER_SPACE_TOP 4
#define OUTER_SPACE_RIGHT 4
#define OUTER_SPACE_BOTTOM 2
// outer space to apply between the area for the items, and the actual items. They refer to a normalized geometry.
#define ITEMS_INSET_LEFT 4
#define ITEMS_INSET_TOP 3
#define ITEMS_INSET_RIGHT 4
#define ITEMS_INSET_BOTTOM 0
//......................................................................................................................
namespace svt
{
//......................................................................................................................
//==================================================================================================================
//= helper
//==================================================================================================================
namespace
{
//--------------------------------------------------------------------------------------------------------------
static void lcl_transform( Rectangle& io_rRect, const ::basegfx::B2DHomMatrix& i_rTransformation )
{
::basegfx::B2DRange aRect( io_rRect.Left(), io_rRect.Top(), io_rRect.Right(), io_rRect.Bottom() );
aRect.transform( i_rTransformation );
io_rRect.Left() = long( aRect.getMinX() );
io_rRect.Top() = long( aRect.getMinY() );
io_rRect.Right() = long( aRect.getMaxX() );
io_rRect.Bottom() = long( aRect.getMaxY() );
}
//--------------------------------------------------------------------------------------------------------------
/** transforms the given, possible rotated playground,
*/
void lcl_rotate( const Rectangle& i_rReference, Rectangle& io_rArea, const bool i_bRight )
{
// step 1: move the to-be-upper-left corner (left/bottom) of the rectangle to (0,0)
::basegfx::B2DHomMatrix aTransformation;
aTransformation.translate(
i_bRight ? -i_rReference.Left() : -i_rReference.Right(),
i_bRight ? -i_rReference.Bottom() : -i_rReference.Top()
);
// step 2: rotate by -90 degrees
aTransformation.rotate( i_bRight ? +F_PI2 : -F_PI2 );
// note:
// on the screen, the ordinate goes top-down, while basegfx calculates in a system where the
// ordinate goes bottom-up; thus the "wrong" sign before F_PI2 here
// step 3: move back to original coordinates
aTransformation.translate( i_rReference.Left(), i_rReference.Top() );
// apply transformation
lcl_transform( io_rArea, aTransformation );
}
}
//------------------------------------------------------------------------------------------------------------------
void lcl_mirrorHorizontally( const Rectangle& i_rReferenceArea, Rectangle& io_rArea )
{
io_rArea.Left() = i_rReferenceArea.Left() + i_rReferenceArea.Right() - io_rArea.Left();
io_rArea.Right() = i_rReferenceArea.Left() + i_rReferenceArea.Right() - io_rArea.Right();
::std::swap( io_rArea.Left(), io_rArea.Right() );
}
//------------------------------------------------------------------------------------------------------------------
void lcl_mirrorVertically( const Rectangle& i_rReferenceArea, Rectangle& io_rArea )
{
io_rArea.Top() = i_rReferenceArea.Top() + i_rReferenceArea.Bottom() - io_rArea.Top();
io_rArea.Bottom() = i_rReferenceArea.Top() + i_rReferenceArea.Bottom() - io_rArea.Bottom();
::std::swap( io_rArea.Top(), io_rArea.Bottom() );
}
//==================================================================================================================
//= NormalizedArea
//==================================================================================================================
//------------------------------------------------------------------------------------------------------------------
NormalizedArea::NormalizedArea()
:m_aReference()
{
}
//------------------------------------------------------------------------------------------------------------------
NormalizedArea::NormalizedArea( const Rectangle& i_rReference, const bool i_bIsVertical )
:m_aReference( i_bIsVertical ? Rectangle( i_rReference.TopLeft(), Size( i_rReference.GetHeight(), i_rReference.GetWidth() ) ) : i_rReference )
{
}
//------------------------------------------------------------------------------------------------------------------
Rectangle NormalizedArea::getTransformed( const Rectangle& i_rArea, const TabAlignment i_eTargetAlignment ) const
{
Rectangle aResult( i_rArea );
if ( ( i_eTargetAlignment == TABS_RIGHT )
|| ( i_eTargetAlignment == TABS_LEFT )
)
{
lcl_rotate( m_aReference, aResult, true );
if ( i_eTargetAlignment == TABS_LEFT )
{
Rectangle aReference( m_aReference );
aReference.Transpose();
lcl_mirrorHorizontally( aReference, aResult );
}
}
else
if ( i_eTargetAlignment == TABS_BOTTOM )
{
lcl_mirrorVertically( m_aReference, aResult );
}
return aResult;
}
//------------------------------------------------------------------------------------------------------------------
Rectangle NormalizedArea::getNormalized( const Rectangle& i_rArea, const TabAlignment i_eTargetAlignment ) const
{
Rectangle aResult( i_rArea );
if ( ( i_eTargetAlignment == TABS_RIGHT )
|| ( i_eTargetAlignment == TABS_LEFT )
)
{
Rectangle aReference( m_aReference );
lcl_rotate( m_aReference, aReference, true );
if ( i_eTargetAlignment == TABS_LEFT )
{
lcl_mirrorHorizontally( aReference, aResult );
}
lcl_rotate( aReference, aResult, false );
}
else
if ( i_eTargetAlignment == TABS_BOTTOM )
{
lcl_mirrorVertically( m_aReference, aResult );
}
return aResult;
}
//==================================================================================================================
//= TabBarGeometry
//==================================================================================================================
//------------------------------------------------------------------------------------------------------------------
TabBarGeometry::TabBarGeometry( const TabItemContent i_eItemContent )
:m_eTabItemContent( i_eItemContent )
,m_aItemsInset()
,m_aButtonBackRect()
,m_aItemsRect()
,m_aButtonForwardRect()
{
m_aItemsInset.Left() = ITEMS_INSET_LEFT;
m_aItemsInset.Top() = ITEMS_INSET_TOP;
m_aItemsInset.Right() = ITEMS_INSET_RIGHT;
m_aItemsInset.Bottom() = ITEMS_INSET_BOTTOM;
}
//------------------------------------------------------------------------------------------------------------------
TabBarGeometry::~TabBarGeometry()
{
}
//------------------------------------------------------------------------------------------------------------------
bool TabBarGeometry::impl_fitItems( ItemDescriptors& io_rItems ) const
{
if ( io_rItems.empty() )
// nothing to do, "no items" perfectly fit into any space we have ...
return true;
// the available size
Size aOutputSize( getItemsRect().GetSize() );
// shrunk by the outer space
aOutputSize.Width() -= m_aItemsInset.Right();
aOutputSize.Height() -= m_aItemsInset.Bottom();
const Rectangle aFitInto( Point( 0, 0 ), aOutputSize );
TabItemContent eItemContent( getItemContent() );
if ( eItemContent == TABITEM_AUTO )
{
// the "content modes" to try
TabItemContent eTryThis[] =
{
TABITEM_IMAGE_ONLY, // assumed to have the smallest rects
TABITEM_TEXT_ONLY,
TABITEM_IMAGE_AND_TEXT // assumed to have the largest rects
};
// determine which of the different version fits
eItemContent = eTryThis[0];
size_t nTryIndex = 2;
while ( nTryIndex > 0 )
{
const Point aBottomRight( io_rItems.rbegin()->GetRect( eTryThis[ nTryIndex ] ).BottomRight() );
if ( aFitInto.IsInside( aBottomRight ) )
{
eItemContent = eTryThis[ nTryIndex ];
break;
}
--nTryIndex;
}
}
// propagate to the items
for ( ItemDescriptors::iterator item = io_rItems.begin();
item != io_rItems.end();
++item
)
{
item->eContent = eItemContent;
}
const ItemDescriptor& rLastItem( *io_rItems.rbegin() );
const Point aLastItemBottomRight( rLastItem.GetCurrentRect().BottomRight() );
return aFitInto.Left() <= aLastItemBottomRight.X()
&& aFitInto.Right() >= aLastItemBottomRight.X();
}
//------------------------------------------------------------------------------------------------------------------
Size TabBarGeometry::getOptimalSize( ItemDescriptors& io_rItems, const bool i_bMinimalSize ) const
{
if ( io_rItems.empty() )
return Size(
m_aItemsInset.Left() + m_aItemsInset.Right(),
m_aItemsInset.Top() + m_aItemsInset.Bottom()
);
// the rect of the last item
const Rectangle& rLastItemRect( i_bMinimalSize ? io_rItems.rbegin()->aIconOnlyArea : io_rItems.rbegin()->aCompleteArea );
return Size(
rLastItemRect.Left() + 1 + m_aItemsInset.Right(),
rLastItemRect.Top() + 1 + rLastItemRect.Bottom() + m_aItemsInset.Bottom()
);
}
//------------------------------------------------------------------------------------------------------------------
void TabBarGeometry::relayout( const Size& i_rActualOutputSize, ItemDescriptors& io_rItems )
{
// assume all items fit
Point aButtonBackPos( OUTER_SPACE_LEFT, OUTER_SPACE_TOP );
m_aButtonBackRect = Rectangle( aButtonBackPos, Size( 1, 1 ) );
m_aButtonBackRect.SetEmpty();
Point aButtonForwardPos( i_rActualOutputSize.Width(), OUTER_SPACE_TOP );
m_aButtonForwardRect = Rectangle( aButtonForwardPos, Size( 1, 1 ) );
m_aButtonForwardRect.SetEmpty();
Point aItemsPos( OUTER_SPACE_LEFT, 0 );
Size aItemsSize( i_rActualOutputSize.Width() - OUTER_SPACE_LEFT - OUTER_SPACE_RIGHT, i_rActualOutputSize.Height() );
m_aItemsRect = Rectangle( aItemsPos, aItemsSize );
if ( !impl_fitItems( io_rItems ) )
{
// assumption was wrong, the items do not fit => calculate rects for the scroll buttons
const Size aButtonSize( BUTTON_FLOW_WIDTH, i_rActualOutputSize.Height() - OUTER_SPACE_TOP - OUTER_SPACE_BOTTOM );
aButtonBackPos = Point( OUTER_SPACE_LEFT, OUTER_SPACE_TOP );
m_aButtonBackRect = Rectangle( aButtonBackPos, aButtonSize );
aButtonForwardPos = Point( i_rActualOutputSize.Width() - BUTTON_FLOW_WIDTH - OUTER_SPACE_RIGHT, OUTER_SPACE_TOP );
m_aButtonForwardRect = Rectangle( aButtonForwardPos, aButtonSize );
aItemsPos.X() = aButtonBackPos.X() + aButtonSize.Width() + BUTTON_FLOW_SPACE;
aItemsSize.Width() = aButtonForwardPos.X() - BUTTON_FLOW_SPACE - aItemsPos.X();
m_aItemsRect = Rectangle( aItemsPos, aItemsSize );
// fit items, again. In the TABITEM_AUTO case, the smaller playground for the items might lead to another
// item content.
impl_fitItems( io_rItems );
}
}
//------------------------------------------------------------------------------------------------------------------
Point TabBarGeometry::getFirstItemPosition() const
{
return Point( m_aItemsInset.Left(), m_aItemsInset.Top() );
}
//......................................................................................................................
} // namespace svt
//......................................................................................................................
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|