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
|
#include <stdlib.h>
#include <string.h>
#include "txt_widget.h"
typedef struct
{
char *signal_name;
TxtWidgetSignalFunc func;
void *user_data;
} txt_callback_t;
struct txt_callback_table_s
{
txt_callback_t *callbacks;
int num_callbacks;
};
txt_callback_table_t *TXT_NewCallbackTable(void)
{
txt_callback_table_t *table;
table = malloc(sizeof(txt_callback_table_t));
table->callbacks = NULL;
table->num_callbacks = 0;
return table;
}
void TXT_DestroyCallbackTable(txt_callback_table_t *table)
{
int i;
for (i=0; i<table->num_callbacks; ++i)
{
free(table->callbacks[i].signal_name);
}
free(table->callbacks);
free(table);
}
void TXT_InitWidget(TXT_UNCAST_ARG(widget), txt_widget_class_t *widget_class)
{
TXT_CAST_ARG(txt_widget_t, widget);
widget->widget_class = widget_class;
widget->callback_table = TXT_NewCallbackTable();
// Default values: visible and selectable
widget->selectable = 1;
widget->visible = 1;
// Align left by default
widget->align = TXT_HORIZ_LEFT;
}
void TXT_SignalConnect(TXT_UNCAST_ARG(widget),
char *signal_name,
TxtWidgetSignalFunc func,
void *user_data)
{
TXT_CAST_ARG(txt_widget_t, widget);
txt_callback_table_t *table;
txt_callback_t *callback;
int i;
table = widget->callback_table;
// Add a new callback to the table
table->callbacks
= realloc(table->callbacks,
sizeof(txt_callback_t) * (table->num_callbacks + 1));
callback = &table->callbacks[table->num_callbacks];
++table->num_callbacks;
callback->signal_name = strdup(signal_name);
callback->func = func;
callback->user_data = user_data;
}
void TXT_EmitSignal(TXT_UNCAST_ARG(widget), char *signal_name)
{
TXT_CAST_ARG(txt_widget_t, widget);
txt_callback_table_t *table;
int i;
table = widget->callback_table;
// Search the table for all callbacks with this name and invoke
// the functions.
for (i=0; i<table->num_callbacks; ++i)
{
if (!strcmp(table->callbacks[i].signal_name, signal_name))
{
table->callbacks[i].func(widget, table->callbacks[i].user_data);
}
}
}
void TXT_CalcWidgetSize(TXT_UNCAST_ARG(widget))
{
TXT_CAST_ARG(txt_widget_t, widget);
widget->widget_class->size_calc(widget);
}
void TXT_DrawWidget(TXT_UNCAST_ARG(widget), int selected)
{
TXT_CAST_ARG(txt_widget_t, widget);
// For convenience...
TXT_GotoXY(widget->x, widget->y);
// Call drawer method
widget->widget_class->drawer(widget, selected);
}
void TXT_DestroyWidget(TXT_UNCAST_ARG(widget))
{
TXT_CAST_ARG(txt_widget_t, widget);
widget->widget_class->destructor(widget);
TXT_DestroyCallbackTable(widget->callback_table);
free(widget);
}
int TXT_WidgetKeyPress(TXT_UNCAST_ARG(widget), int key)
{
TXT_CAST_ARG(txt_widget_t, widget);
if (widget->widget_class->key_press != NULL)
{
return widget->widget_class->key_press(widget, key);
}
return 0;
}
void TXT_SetWidgetAlign(TXT_UNCAST_ARG(widget), txt_horiz_align_t horiz_align)
{
TXT_CAST_ARG(txt_widget_t, widget);
widget->align = horiz_align;
}
void TXT_WidgetMousePress(TXT_UNCAST_ARG(widget), int x, int y, int b)
{
TXT_CAST_ARG(txt_widget_t, widget);
if (widget->widget_class->mouse_press != NULL)
{
widget->widget_class->mouse_press(widget, x, y, b);
}
}
void TXT_LayoutWidget(TXT_UNCAST_ARG(widget))
{
TXT_CAST_ARG(txt_widget_t, widget);
if (widget->widget_class->layout != NULL)
{
widget->widget_class->layout(widget);
}
}
|
