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 /**   System Management (System)                                          */
19 /**                                                                       */
20 /**************************************************************************/
21 
22 #define GX_SOURCE_CODE
23 
24 
25 /* Include necessary system files.  */
26 
27 #include "gx_api.h"
28 #include "gx_utility.h"
29 #include "gx_system.h"
30 #include "gx_widget.h"
31 
32 
33 /**************************************************************************/
34 /*                                                                        */
35 /*  FUNCTION                                               RELEASE        */
36 /*                                                                        */
37 /*    _gx_system_top_widget_find                          PORTABLE C      */
38 /*                                                           6.1          */
39 /*  AUTHOR                                                                */
40 /*                                                                        */
41 /*    Kenneth Maxwell, Microsoft Corporation                              */
42 /*                                                                        */
43 /*  DESCRIPTION                                                           */
44 /*                                                                        */
45 /*    This function finds the top widget that contains the test point.    */
46 /*                                                                        */
47 /*  INPUT                                                                 */
48 /*                                                                        */
49 /*    root                                  Widget pointer                */
50 /*    test_point                            Point to search for           */
51 /*    status                                Widget status to match        */
52 /*                                                                        */
53 /*  OUTPUT                                                                */
54 /*                                                                        */
55 /*    GX_WIDGET                             Pointer to found widget       */
56 /*                                                                        */
57 /*  CALLS                                                                 */
58 /*                                                                        */
59 /*    _gx_utility_rectangle_point_detect    Detect point in rectangle     */
60 /*                                                                        */
61 /*  CALLED BY                                                             */
62 /*                                                                        */
63 /*    _gx_system_event_dispatch             Dispatch GUIX events          */
64 /*                                                                        */
65 /*  RELEASE HISTORY                                                       */
66 /*                                                                        */
67 /*    DATE              NAME                      DESCRIPTION             */
68 /*                                                                        */
69 /*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
70 /*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
71 /*                                            resulting in version 6.1    */
72 /*                                                                        */
73 /**************************************************************************/
_gx_system_top_widget_find(GX_WIDGET * root,GX_POINT test_point,ULONG status)74 GX_WIDGET  *_gx_system_top_widget_find(GX_WIDGET *root, GX_POINT test_point, ULONG status)
75 {
76 
77 GX_WIDGET *test;
78 GX_WIDGET *winner = GX_NULL;
79 
80     /* Setup test widget pointer to the last child.  */
81     test =  root -> gx_widget_last_child;
82 
83     /* Loop through the widgets in reverse order.  */
84     while (test)
85     {
86         if (test -> gx_widget_status & GX_STATUS_VISIBLE)
87         {
88             /* Is the point in this widget?  */
89             if (_gx_utility_rectangle_point_detect(&test -> gx_widget_clip, test_point))
90             {
91                 /* Yes, pickup the last child of this widget.  */
92                 root =  test;
93                 test =  root -> gx_widget_last_child;
94 
95                 if (status)
96                 {
97                     if (root -> gx_widget_status & status)
98                     {
99                         winner = root;
100                     }
101                 }
102                 else
103                 {
104                     winner = root;
105                 }
106                 continue;
107             }
108         }
109 
110         /* Move to the previous widget.  */
111         test = test -> gx_widget_previous;
112     }
113 
114     /* Return the root widget.  */
115     return(winner);
116 }
117 
118