src/gigedit/wrapLabel.cc

/* *************************************************************************
 * Copyright (c) 2005 VMware, Inc.
 * Copyright (c) 2011 - 2017 Andreas Persson
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * *************************************************************************/

#include <wrapLabel.hh>


/*
 * wrapLabel.cc --
 *
 *     A wrappable label widget.
 */


namespace view {


/*
 *-----------------------------------------------------------------------------
 *
 * view::WrapLabel::WrapLabel --
 *
 *      Constructor.
 *
 * Results:
 *      None.
 *
 * Side effects:
 *      None.
 *
 *-----------------------------------------------------------------------------
 */

WrapLabel::WrapLabel(const Glib::ustring &text) // IN: The label text
   : mWrapWidth(0),
     mWrapHeight(0)
{
   get_layout()->set_wrap(Pango::WRAP_WORD_CHAR);
   set_alignment(0.0, 0.0);
   set_text(text);
}


/*
 *-----------------------------------------------------------------------------
 *
 * view::WrapLabel::set_text --
 *
 *      Override function for Label::set_text() that re-sets the wrapping
 *      width after the text is set.
 *
 * Results:
 *      None.
 *
 * Side effects:
 *      None.
 *
 *-----------------------------------------------------------------------------
 */

void
WrapLabel::set_text(const Glib::ustring &str) // IN: The text to set
{
   Label::set_text(str);

   SetWrapWidth(mWrapWidth);
}


/*
 *-----------------------------------------------------------------------------
 *
 * view::WrapLabel::set_markup --
 *
 *      Override function for Label::set_markup() that re-sets the wrapping
 *      width after the text is set.
 *
 * Results:
 *      None.
 *
 * Side effects:
 *      None.
 *
 *-----------------------------------------------------------------------------
 */

void
WrapLabel::set_markup(const Glib::ustring &str) // IN: The text to set
{
   Label::set_markup(str);

   SetWrapWidth(mWrapWidth);
}


/*
 *-----------------------------------------------------------------------------
 *
 * view::WrapLabel::on_size_request --
 *
 *      Override handler for the "size_request" signal. Forces the height
 *      to be the size necessary for the Pango layout, while allowing the
 *      width to be flexible.
 *
 * Results:
 *      None.
 *
 * Side effects:
 *      None.
 *
 *-----------------------------------------------------------------------------
 */

void
WrapLabel::on_size_request(Gtk::Requisition *req) // OUT: Our requested size
{
   req->width  = 0;
   req->height = mWrapHeight;
}


/*
 *-----------------------------------------------------------------------------
 *
 * view::WrapLabel::on_size_allocate --
 *
 *      Override handler for the "size_allocate" signal. Sets the wrap width
 *      to the be width allocated to us.
 *
 * Results:
 *      None.
 *
 * Side effects:
 *      None.
 *
 *-----------------------------------------------------------------------------
 */

void
WrapLabel::on_size_allocate(Gtk::Allocation &alloc) // IN: Our allocation
{
   Gtk::Label::on_size_allocate(alloc);

   SetWrapWidth(alloc.get_width());
}


/*
 *-----------------------------------------------------------------------------
 *
 * view::WrapLabel::SetWrapWidth --
 *
 *      Sets the point at which the text should wrap.
 *
 * Results:
 *      None.
 *
 * Side effects:
 *      None.
 *
 *-----------------------------------------------------------------------------
 */

void
WrapLabel::SetWrapWidth(int width) // IN: The wrap width
{
   if (width == 0) {
      return;
   }

   int xPadding, yPadding;
   get_padding(xPadding, yPadding);

   width -= 2 * xPadding;

   /*
    * We may need to reset the wrap width, so do this regardless of whether
    * or not we've changed the width.
    */
   get_layout()->set_width(width * Pango::SCALE);

   int unused;
   get_layout()->get_pixel_size(unused, mWrapHeight);
   mWrapHeight += 2 * yPadding;

   if (mWrapWidth != width) {
      mWrapWidth = width;
      queue_resize();
   }
}


}; /* namespace view */
1	persson	1799	/* *************************************************************************
2			* Copyright (c) 2005 VMware, Inc.
3	schoenebeck	3184	* Copyright (c) 2011 - 2017 Andreas Persson
4	persson	1799	*
5			* Permission is hereby granted, free of charge, to any person obtaining
6			* a copy of this software and associated documentation files (the
7			* "Software"), to deal in the Software without restriction, including
8			* without limitation the rights to use, copy, modify, merge, publish,
9			* distribute, sublicense, and/or sell copies of the Software, and to
10			* permit persons to whom the Software is furnished to do so, subject to
11			* the following conditions:
12			*
13			* The above copyright notice and this permission notice shall be
14			* included in all copies or substantial portions of the Software.
15			*
16			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17			* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18			* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19			* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
20			* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
21			* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
22			* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23			* *************************************************************************/
24
25			#include <wrapLabel.hh>
26
27
28			/*
29			* wrapLabel.cc --
30			*
31			* A wrappable label widget.
32			*/
33
34
35			namespace view {
36
37
38			/*
39			*-----------------------------------------------------------------------------
40			*
41			* view::WrapLabel::WrapLabel --
42			*
43			* Constructor.
44			*
45			* Results:
46			* None.
47			*
48			* Side effects:
49			* None.
50			*
51			*-----------------------------------------------------------------------------
52			*/
53
54			WrapLabel::WrapLabel(const Glib::ustring &text) // IN: The label text
55	persson	2169	: mWrapWidth(0),
56			mWrapHeight(0)
57	persson	1799	{
58			get_layout()->set_wrap(Pango::WRAP_WORD_CHAR);
59			set_alignment(0.0, 0.0);
60			set_text(text);
61			}
62
63
64			/*
65			*-----------------------------------------------------------------------------
66			*
67			* view::WrapLabel::set_text --
68			*
69			* Override function for Label::set_text() that re-sets the wrapping
70			* width after the text is set.
71			*
72			* Results:
73			* None.
74			*
75			* Side effects:
76			* None.
77			*
78			*-----------------------------------------------------------------------------
79			*/
80
81			void
82			WrapLabel::set_text(const Glib::ustring &str) // IN: The text to set
83			{
84			Label::set_text(str);
85
86			SetWrapWidth(mWrapWidth);
87			}
88
89
90			/*
91			*-----------------------------------------------------------------------------
92			*
93			* view::WrapLabel::set_markup --
94			*
95			* Override function for Label::set_markup() that re-sets the wrapping
96			* width after the text is set.
97			*
98			* Results:
99			* None.
100			*
101			* Side effects:
102			* None.
103			*
104			*-----------------------------------------------------------------------------
105			*/
106
107			void
108			WrapLabel::set_markup(const Glib::ustring &str) // IN: The text to set
109			{
110			Label::set_markup(str);
111
112			SetWrapWidth(mWrapWidth);
113			}
114
115
116			/*
117			*-----------------------------------------------------------------------------
118			*
119			* view::WrapLabel::on_size_request --
120			*
121			* Override handler for the "size_request" signal. Forces the height
122			* to be the size necessary for the Pango layout, while allowing the
123			* width to be flexible.
124			*
125			* Results:
126			* None.
127			*
128			* Side effects:
129			* None.
130			*
131			*-----------------------------------------------------------------------------
132			*/
133
134			void
135			WrapLabel::on_size_request(Gtk::Requisition *req) // OUT: Our requested size
136			{
137	persson	2169	req->width = 0;
138			req->height = mWrapHeight;
139			}
140	persson	1799
141
142			/*
143			*-----------------------------------------------------------------------------
144			*
145			* view::WrapLabel::on_size_allocate --
146			*
147			* Override handler for the "size_allocate" signal. Sets the wrap width
148			* to the be width allocated to us.
149			*
150			* Results:
151			* None.
152			*
153			* Side effects:
154			* None.
155			*
156			*-----------------------------------------------------------------------------
157			*/
158
159			void
160			WrapLabel::on_size_allocate(Gtk::Allocation &alloc) // IN: Our allocation
161			{
162			Gtk::Label::on_size_allocate(alloc);
163
164			SetWrapWidth(alloc.get_width());
165			}
166
167
168			/*
169			*-----------------------------------------------------------------------------
170			*
171			* view::WrapLabel::SetWrapWidth --
172			*
173			* Sets the point at which the text should wrap.
174			*
175			* Results:
176			* None.
177			*
178			* Side effects:
179			* None.
180			*
181			*-----------------------------------------------------------------------------
182			*/
183
184			void
185	persson	2169	WrapLabel::SetWrapWidth(int width) // IN: The wrap width
186	persson	1799	{
187			if (width == 0) {
188			return;
189			}
190
191	schoenebeck	3184	int xPadding, yPadding;
192			get_padding(xPadding, yPadding);
193
194			width -= 2 * xPadding;
195
196	persson	1799	/*
197			* We may need to reset the wrap width, so do this regardless of whether
198			* or not we've changed the width.
199			*/
200			get_layout()->set_width(width * Pango::SCALE);
201
202	persson	2169	int unused;
203			get_layout()->get_pixel_size(unused, mWrapHeight);
204	schoenebeck	3184	mWrapHeight += 2 * yPadding;
205	persson	2169
206	persson	1799	if (mWrapWidth != width) {
207			mWrapWidth = width;
208			queue_resize();
209			}
210			}
211
212
213			}; /* namespace view */