1 /* This is a small demo of the high-performance GUIX graphics framework. */
2
3 #include <stdio.h>
4 #include "gx_api.h"
5 #include "all_widgets_4bpp_resources.h"
6 #include "all_widgets_4bpp_specifications.h"
7
8
9 #define LINE_LENGTH 100
10 #define LINE_WINDOW_LINE_LENGTH 80
11 #define LINE_CENTER_X_OFFSET 150
12 #define LINE_CENTER_Y_OFFSET 150
13
14 GX_WINDOW *pLineWin = &line_screen.line_screen_line_window;
15 int line_angle = 0;
16 int line_width = 1;
17 GX_BOOL rounded = GX_FALSE;
18 int line_x1;
19 int line_x2;
20 int line_y1;
21 int line_y2;
22 INT line_pattern;
23
24
calculate_line_ends(VOID)25 VOID calculate_line_ends(VOID)
26 {
27 INT scaled_angle;
28 INT x_dist;
29 INT y_dist;
30
31 INT x_center = pLineWin->gx_widget_size.gx_rectangle_left + LINE_CENTER_X_OFFSET;
32 INT y_center = pLineWin->gx_widget_size.gx_rectangle_top + LINE_CENTER_Y_OFFSET;
33
34 scaled_angle = GX_FIXED_VAL_MAKE(line_angle);
35 x_dist = GX_FIXED_VAL_TO_INT(gx_utility_math_cos(scaled_angle) * LINE_WINDOW_LINE_LENGTH);
36 y_dist = GX_FIXED_VAL_TO_INT(gx_utility_math_sin(scaled_angle) * LINE_WINDOW_LINE_LENGTH);
37
38 line_x1 = x_center - x_dist;
39 line_x2 = x_center + x_dist;
40 line_y1 = y_center - y_dist;
41 line_y2 = y_center + y_dist;
42 }
43
update_width_prompt(VOID)44 VOID update_width_prompt(VOID)
45 {
46 GX_PROMPT *pp;
47 static GX_CHAR width_val[10];
48 GX_STRING string;
49
50 gx_widget_find((GX_WINDOW *)&line_screen, ID_WIDTH_DISPLAY, 0, &pp);
51
52 if (pp)
53 {
54 gx_utility_ltoa(line_width, width_val, 10);
55 string.gx_string_ptr = width_val;
56 string.gx_string_length = strnlen(width_val, sizeof(width_val));
57 gx_prompt_text_set_ext(pp, &string);
58 }
59 }
60
update_line_angle_prompt(VOID)61 VOID update_line_angle_prompt(VOID)
62 {
63 GX_PROMPT *pp;
64 static GX_CHAR angle_val[10];
65 GX_STRING string;
66
67 gx_widget_find((GX_WINDOW *)&line_screen, ID_ANGLE_PROMPT, 0, &pp);
68
69 if (pp)
70 {
71 gx_utility_ltoa(line_angle, angle_val, 10);
72 string.gx_string_ptr = angle_val;
73 string.gx_string_length = strnlen(angle_val, sizeof(angle_val));
74 gx_prompt_text_set_ext(pp, &string);
75 }
76 }
77
line_screen_event_handler(GX_WINDOW * window,GX_EVENT * myevent)78 UINT line_screen_event_handler(GX_WINDOW *window, GX_EVENT *myevent)
79 {
80 UINT status = 0;
81
82 switch (myevent->gx_event_type)
83 {
84 case GX_SIGNAL(ID_LINE_WIDTH, GX_EVENT_SLIDER_VALUE):
85 line_width = myevent->gx_event_payload.gx_event_longdata;
86 update_width_prompt();
87 gx_system_dirty_mark(pLineWin);
88 break;
89
90 case GX_SIGNAL(ID_LINE_ANGLE, GX_EVENT_SLIDER_VALUE):
91 line_angle = myevent->gx_event_payload.gx_event_longdata;
92 update_line_angle_prompt();
93 calculate_line_ends();
94 gx_system_dirty_mark(pLineWin);
95 break;
96
97 case GX_SIGNAL(ID_ROUNDED, GX_EVENT_TOGGLE_ON):
98 rounded = GX_TRUE;
99 gx_system_dirty_mark(pLineWin);
100 break;
101
102 case GX_SIGNAL(ID_ROUNDED, GX_EVENT_TOGGLE_OFF):
103 rounded = GX_FALSE;
104 gx_system_dirty_mark(pLineWin);
105 break;
106
107 case GX_SIGNAL(ID_PATTERN, GX_EVENT_TOGGLE_ON):
108 line_pattern = 0x0f0f0f0f;
109 gx_system_dirty_mark(pLineWin);
110 break;
111
112 case GX_SIGNAL(ID_PATTERN, GX_EVENT_TOGGLE_OFF):
113 line_pattern = 0;
114 gx_system_dirty_mark(pLineWin);
115 break;
116
117 default:
118 status = next_button_handler(window, myevent);
119 break;
120 }
121 return status;
122 }
123
124
125
line_win_draw(GX_WINDOW * window)126 VOID line_win_draw(GX_WINDOW *window)
127 {
128 ULONG brush_style = 0;
129 GX_BRUSH *brush = GX_NULL;
130
131 gx_window_draw((GX_WINDOW*)window);
132
133 if (rounded)
134 {
135 brush_style |= GX_BRUSH_ROUND;
136 }
137
138 gx_context_raw_brush_define(0xffffff, 0x555555, brush_style);
139 gx_context_brush_width_set(line_width);
140 gx_context_brush_get(&brush);
141 if (brush)
142 {
143 brush->gx_brush_line_pattern = line_pattern;
144 gx_context_brush_set(brush);
145 }
146 calculate_line_ends();
147 gx_canvas_line_draw(line_x1, line_y1, line_x2, line_y2);
148 }
149
