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 
31 
32 /**************************************************************************/
33 /*                                                                        */
34 /*  FUNCTION                                               RELEASE        */
35 /*                                                                        */
36 /*    _gx_system_top_root_find                            PORTABLE C      */
37 /*                                                           6.1          */
38 /*  AUTHOR                                                                */
39 /*                                                                        */
40 /*    Kenneth Maxwell, Microsoft Corporation                              */
41 /*                                                                        */
42 /*  DESCRIPTION                                                           */
43 /*                                                                        */
44 /*    This function finds the top root window for a given incoming event. */
45 /*                                                                        */
46 /*  INPUT                                                                 */
47 /*                                                                        */
48 /*    in_event                              Pointer to event              */
49 /*                                                                        */
50 /*  OUTPUT                                                                */
51 /*                                                                        */
52 /*    GX_WINDOW_ROOT                        Pointer to found root window  */
53 /*                                                                        */
54 /*  CALLS                                                                 */
55 /*                                                                        */
56 /*    _gx_utility_rectangle_shift           Shift a rectangle             */
57 /*    _gx_utility_rectangle_point_detect    Detect point in rectangle     */
58 /*                                                                        */
59 /*  CALLED BY                                                             */
60 /*                                                                        */
61 /*    _gx_system_event_dispatch             Dispatch GUIX event           */
62 /*                                                                        */
63 /*  RELEASE HISTORY                                                       */
64 /*                                                                        */
65 /*    DATE              NAME                      DESCRIPTION             */
66 /*                                                                        */
67 /*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
68 /*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
69 /*                                            resulting in version 6.1    */
70 /*                                                                        */
71 /**************************************************************************/
_gx_system_top_root_find(GX_EVENT * in_event)72 GX_WINDOW_ROOT  *_gx_system_top_root_find(GX_EVENT *in_event)
73 {
74 GX_WINDOW_ROOT *root = _gx_system_root_window_created_list;
75 GX_RECTANGLE    testsize;
76 
77     /* Loop through the widgets in reverse order.  */
78     while (root)
79     {
80         if (root -> gx_widget_status & GX_STATUS_VISIBLE)
81         {
82             if (in_event -> gx_event_display_handle == (ULONG)(root -> gx_window_root_canvas -> gx_canvas_display -> gx_display_driver_data))
83             {
84                 /* get the root window size */
85                 testsize = root -> gx_widget_size;
86 
87                 /* offset the size by the canvas offset */
88                 _gx_utility_rectangle_shift(&testsize,
89                                             root -> gx_window_root_canvas -> gx_canvas_display_offset_x,
90                                             root -> gx_window_root_canvas -> gx_canvas_display_offset_y);
91 
92                 /* Is the point in this widget?  */
93                 if (_gx_utility_rectangle_point_detect(&testsize, in_event -> gx_event_payload.gx_event_pointdata))
94                 {
95                     break;
96                 }
97             }
98         }
99 
100         /* Move to the next root window.  */
101         root = (GX_WINDOW_ROOT *)root -> gx_widget_next;
102     }
103 
104     /* Return the root widget.  */
105     return(root);
106 }
107 
108