NXWidgets: singletons.cxx Source File

NXWidgets 1.19

singletons.cxx
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1 /****************************************************************************
2 * NxWidgets/libnxwidgets/src/singletons.cxx
3 *
4 * Copyright (C) 2012 Gregory Nutt. All rights reserved.
5 * Author: Gregory Nutt <gnutt@nuttx.org>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name NuttX, NxWidgets, nor the names of its contributors
18 * me be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
28 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 *
34 ****************************************************************************
35 *
36 * Portions of this package derive from Woopsi (http://woopsi.org/) and
37 * portions are original efforts. It is difficult to determine at this
38 * point what parts are original efforts and which parts derive from Woopsi.
39 * However, in any event, the work of Antony Dzeryn will be acknowledged
40 * in most NxWidget files. Thanks Antony!
41 *
42 * Copyright (c) 2007-2011, Antony Dzeryn
43 * All rights reserved.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions are met:
47 *
48 * * Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * * Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 * * Neither the names "Woopsi", "Simian Zombie" nor the
54 * names of its contributors may be used to endorse or promote products
55 * derived from this software without specific prior written permission.
56 *
57 * THIS SOFTWARE IS PROVIDED BY Antony Dzeryn ``AS IS'' AND ANY
58 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
59 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
60 * DISCLAIMED. IN NO EVENT SHALL Antony Dzeryn BE LIABLE FOR ANY
61 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
62 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
63 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
64 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
65 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
66 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
67 *
68 ****************************************************************************/
69
70 /****************************************************************************
71 * Included Files
72 ****************************************************************************/
73
74 #include <nuttx/config.h>
75
76 #include <sys/types.h>
77 #include <stdint.h>
78 #include <stdbool.h>
79 #include <sched.h>
80 #include <debug.h>
81
82 #include "nxconfig.hxx"
83 #include "cnxserver.hxx"
84 #include "cnxstring.hxx"
85 #include "cwidgetstyle.hxx"
86 #include "cnxfont.hxx"
87 #include "singletons.hxx"
88
89 /****************************************************************************
90 * Pre-Processor Definitions
91 ****************************************************************************/
92
93 /****************************************************************************
94 * Global Static Data
95 ****************************************************************************/
96
97 using namespace NXWidgets;
98
99 CWidgetStyle *NXWidgets::g_defaultWidgetStyle; /**< The default widget style */
100 CNxString *NXWidgets::g_nullString; /**< The reusable empty string */
101 TNxArray<CNxTimer*> *NXWidgets::g_nxTimers; /**< An array of all timers */
102
103 /****************************************************************************
104 * Method Implementations
105 ****************************************************************************/
106
107 /**
108 * Setup misc singleton instances. Why is there here? Because it needs to be
109 * done one time before any widgets are created. So why isn't it just the
110 * default style just a statically constructed class? Because not all platforms
111 * will support static class constructions.
112 */
113
114 void NXWidgets::instantiateSingletons(void)
115 {
116 // Disable pre-emption. Since we are dealing with global resources here we
117 // are not inherently thread-safe.
118
119 sched_lock();
120
121 // Create a global, empty string that may be used whereever a string is
122 // required, but not needed.
123
124 if (!g_nullString)
125 {
126 g_nullString = new CNxString();
127 }
128
129 // Setup the default widget style
130
131 if (!g_defaultWidgetStyle)
132 {
133 // Create the singleton
134
135 g_defaultWidgetStyle = new CWidgetStyle();
136
137 // Default colors
138
139 g_defaultWidgetStyle->colors.background = CONFIG_NXWIDGETS_DEFAULT_BACKGROUNDCOLOR;
140 g_defaultWidgetStyle->colors.selectedBackground = CONFIG_NXWIDGETS_DEFAULT_SELECTEDBACKGROUNDCOLOR;
141 g_defaultWidgetStyle->colors.shineEdge = CONFIG_NXWIDGETS_DEFAULT_SHINEEDGECOLOR;
142 g_defaultWidgetStyle->colors.shadowEdge = CONFIG_NXWIDGETS_DEFAULT_SHADOWEDGECOLOR;
143 g_defaultWidgetStyle->colors.highlight = CONFIG_NXWIDGETS_DEFAULT_HIGHLIGHTCOLOR;
144
145 g_defaultWidgetStyle->colors.disabledText = CONFIG_NXWIDGETS_DEFAULT_DISABLEDTEXTCOLOR;
146 g_defaultWidgetStyle->colors.enabledText = CONFIG_NXWIDGETS_DEFAULT_ENABLEDTEXTCOLOR;
147 g_defaultWidgetStyle->colors.selectedText = CONFIG_NXWIDGETS_DEFAULT_SELECTEDTEXTCOLOR;
148
149 // Default font using the default font ID and the default font colors
150
151 g_defaultWidgetStyle->font = new CNxFont((enum nx_fontid_e)CONFIG_NXWIDGETS_DEFAULT_FONTID,
152 CONFIG_NXWIDGETS_DEFAULT_FONTCOLOR,
153 CONFIG_NXWIDGETS_TRANSPARENT_COLOR);
154 }
155
156 // Create the timer list
157
158 if (!g_nxTimers)
159 {
160 g_nxTimers = new TNxArray<CNxTimer*>();
161 }
162
163 sched_unlock();
164 }
165
166 /**
167 * Free the singleton instances when the last NX server is destroyed.
168 */
169
170 void NXWidgets::freeSingletons(void)
171 {
172 // Delete the null string singleton
173
174 if (g_nullString)
175 {
176 delete g_nullString;
177 g_nullString = (CNxString *)NULL;
178 }
179
180 // Delete the default widget style singleton
181
182 if (g_defaultWidgetStyle)
183 {
184 if (g_defaultWidgetStyle->font)
185 {
186 delete g_defaultWidgetStyle->font;
187 }
188
189 delete g_defaultWidgetStyle;
190 g_defaultWidgetStyle = (CWidgetStyle *)NULL;
191 }
192
193 // Free the timer list
194
195 if (g_nxTimers)
196 {
197 delete g_nxTimers;
198 g_nxTimers = (TNxArray<CNxTimer*> *)NULL;
199 }
200
201 }
202
NXWidgets::CWidgetColors::selectedBackground
nxgl_mxpixel_t selectedBackground
Definition: cwidgetstyle.hxx:106
NXWidgets::CWidgetColors::enabledText
nxgl_mxpixel_t enabledText
Definition: cwidgetstyle.hxx:111
NXWidgets::CWidgetStyle
Definition: cwidgetstyle.hxx:125
singletons.hxx
NXWidgets::CWidgetColors::disabledText
nxgl_mxpixel_t disabledText
Definition: cwidgetstyle.hxx:110
NXWidgets::instantiateSingletons
void instantiateSingletons(void)
Definition: singletons.cxx:114
NXWidgets::CWidgetColors::shadowEdge
nxgl_mxpixel_t shadowEdge
Definition: cwidgetstyle.hxx:108
cwidgetstyle.hxx
NXWidgets
Definition: cbgwindow.hxx:65
nxconfig.hxx
NXWidgets::g_nxTimers
TNxArray< CNxTimer * > * g_nxTimers
Definition: singletons.hxx:109
TNxArray
Definition: tnxarray.hxx:109
NXWidgets::CNxFont
Definition: cnxfont.hxx:70
NXWidgets::CWidgetColors::shineEdge
nxgl_mxpixel_t shineEdge
Definition: cwidgetstyle.hxx:107
NXWidgets::CWidgetColors::background
nxgl_mxpixel_t background
Definition: cwidgetstyle.hxx:105
NXWidgets::CWidgetStyle::font
CNxFont * font
Definition: cwidgetstyle.hxx:129
cnxfont.hxx
NXWidgets::g_defaultWidgetStyle
CWidgetStyle * g_defaultWidgetStyle
Definition: singletons.hxx:101
NXWidgets::CNxString
Definition: cnxstring.hxx:121
cnxserver.hxx
NXWidgets::CWidgetColors::highlight
nxgl_mxpixel_t highlight
Definition: cwidgetstyle.hxx:109
NXWidgets::CWidgetStyle::colors
CWidgetColors colors
Definition: cwidgetstyle.hxx:128
NXWidgets::freeSingletons
void freeSingletons(void)
Definition: singletons.cxx:170
NXWidgets::CWidgetColors::selectedText
nxgl_mxpixel_t selectedText
Definition: cwidgetstyle.hxx:112
cnxstring.hxx
NXWidgets::g_nullString
CNxString * g_nullString
Definition: singletons.hxx:108