1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** GUIX Component */
17 /** */
18 /** Scroll Management (Scroll Thumb) */
19 /** */
20 /**************************************************************************/
21
22 #define GX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "gx_api.h"
28 #include "gx_system.h"
29 #include "gx_widget.h"
30 #include "gx_scrollbar.h"
31 #include "gx_button.h"
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _gx_scroll_thumb_event_process PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Kenneth Maxwell, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function processes events for a scrollbar thumb button */
46 /* */
47 /* INPUT */
48 /* */
49 /* scroll_thumb Scroll thumb widget control */
50 /* block */
51 /* event Pointer to event to process */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* status Completion status */
56 /* */
57 /* CALLS */
58 /* */
59 /* _gx_button_event_process Default button event process */
60 /* _gx_system_input_capture Default widget event process */
61 /* _gx_system_input_release Direct all input events */
62 /* _gx_widget_shift Shift the widget */
63 /* _gx_widget_height_get Get the height of widget */
64 /* _gx_scroll_thumb_shift_limit Limit the travel of the */
65 /* scrollbar thumb button */
66 /* _gx_widget_width_get Get the width of widget */
67 /* [_gx_widget_event_process_function] Widget event process routine */
68 /* _gx_widget_event_process Default widget event process */
69 /* */
70 /* CALLED BY */
71 /* */
72 /* Application Code */
73 /* GUIX Internal Code */
74 /* */
75 /* RELEASE HISTORY */
76 /* */
77 /* DATE NAME DESCRIPTION */
78 /* */
79 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
80 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
81 /* resulting in version 6.1 */
82 /* */
83 /**************************************************************************/
_gx_scroll_thumb_event_process(GX_SCROLL_THUMB * thumb,GX_EVENT * event_ptr)84 UINT _gx_scroll_thumb_event_process(GX_SCROLL_THUMB *thumb, GX_EVENT *event_ptr)
85 {
86 GX_EVENT newevent;
87 GX_WIDGET *widget = (GX_WIDGET *)thumb;
88 UINT status;
89 INT shift;
90 GX_VALUE widget_height;
91 GX_VALUE widget_width;
92
93 /* Default status to success. */
94 status = GX_SUCCESS;
95
96 /* Process relative to the type of event. */
97 switch (event_ptr -> gx_event_type)
98 {
99 case GX_EVENT_SHOW:
100 status = _gx_widget_event_process(widget, event_ptr);
101 if (thumb -> gx_scroll_thumb_pixelmap)
102 {
103 if (_gx_widget_transparent_pixelmap_detect(widget, thumb -> gx_scroll_thumb_pixelmap))
104 {
105 _gx_widget_status_add(widget, GX_STATUS_TRANSPARENT);
106 }
107 }
108 break;
109
110 case GX_EVENT_PEN_DOWN:
111 _gx_system_input_capture(widget);
112
113 thumb -> gx_scroll_thumb_drag_mode = GX_TRUE;
114
115 if (widget -> gx_widget_style & GX_SCROLLBAR_VERTICAL)
116 {
117 thumb -> gx_scroll_thumb_start_drag = event_ptr -> gx_event_payload.gx_event_pointdata.gx_point_y;
118 }
119 else
120 {
121 thumb -> gx_scroll_thumb_start_drag = event_ptr -> gx_event_payload.gx_event_pointdata.gx_point_x;
122 }
123 break;
124
125 case GX_EVENT_PEN_UP:
126 if (widget ->gx_widget_status & GX_STATUS_OWNS_INPUT)
127 {
128 _gx_system_input_release(widget);
129 }
130 break;
131
132 case GX_EVENT_PEN_DRAG:
133 if (thumb -> gx_widget_style & GX_SCROLLBAR_VERTICAL)
134 {
135 if (event_ptr -> gx_event_payload.gx_event_pointdata.gx_point_y != thumb -> gx_scroll_thumb_start_drag)
136 {
137 shift = event_ptr -> gx_event_payload.gx_event_pointdata.gx_point_y - thumb -> gx_scroll_thumb_start_drag;
138 shift = _gx_scroll_thumb_shift_limit(thumb, shift);
139
140 if (shift)
141 {
142 _gx_widget_shift(widget, 0, (GX_VALUE)shift, GX_TRUE);
143 thumb -> gx_scroll_thumb_start_drag = event_ptr -> gx_event_payload.gx_event_pointdata.gx_point_y;
144 newevent.gx_event_type = GX_EVENT_VERTICAL_SCROLL;
145 newevent.gx_event_payload.gx_event_intdata[0] = widget -> gx_widget_size.gx_rectangle_top;
146
147 _gx_widget_height_get(widget, &widget_height);
148 newevent.gx_event_payload.gx_event_intdata[1] = (INT)widget_height;
149
150 newevent.gx_event_sender = GX_ID_SCROLL_THUMB;
151
152 /* send the scroll event to my parent scrollbar */
153 thumb -> gx_widget_parent -> gx_widget_event_process_function(thumb -> gx_widget_parent, &newevent);
154 }
155 }
156 }
157 else
158 {
159 if (event_ptr -> gx_event_payload.gx_event_pointdata.gx_point_x != thumb -> gx_scroll_thumb_start_drag)
160 {
161 shift = event_ptr -> gx_event_payload.gx_event_pointdata.gx_point_x - thumb -> gx_scroll_thumb_start_drag;
162 shift = _gx_scroll_thumb_shift_limit(thumb, shift);
163
164 if (shift)
165 {
166 _gx_widget_shift(widget, (GX_VALUE)shift, 0, GX_TRUE);
167 thumb -> gx_scroll_thumb_start_drag = event_ptr -> gx_event_payload.gx_event_pointdata.gx_point_x;
168 newevent.gx_event_type = GX_EVENT_HORIZONTAL_SCROLL;
169 newevent.gx_event_payload.gx_event_intdata[0] = widget -> gx_widget_size.gx_rectangle_left;
170
171 _gx_widget_width_get(widget, &widget_width);
172 newevent.gx_event_payload.gx_event_intdata[1] = (INT)widget_width;
173 newevent.gx_event_sender = GX_ID_SCROLL_THUMB;
174
175 /* send the scroll event to my parent scrollbar */
176 widget -> gx_widget_parent -> gx_widget_event_process_function(thumb -> gx_widget_parent, &newevent);
177 }
178 }
179 }
180 break;
181
182 default:
183
184 /* Call the widget default processing. */
185 status = _gx_widget_event_process(widget, event_ptr);
186 }
187
188 /* Return completion status. */
189 return(status);
190 }
191
192
