1 /***************************************************************************
2  * Copyright (c) 2024 Microsoft Corporation
3  *
4  * This program and the accompanying materials are made available under the
5  * terms of the MIT License which is available at
6  * https://opensource.org/licenses/MIT.
7  *
8  * SPDX-License-Identifier: MIT
9  **************************************************************************/
10 
11 
12 /**************************************************************************/
13 /**************************************************************************/
14 /**                                                                       */
15 /** GUIX Component                                                        */
16 /**                                                                       */
17 /**   Horizontal List (List)                                              */
18 /**                                                                       */
19 /**************************************************************************/
20 
21 #define GX_SOURCE_CODE
22 
23 
24 /* Include necessary system files.  */
25 
26 #include "gx_api.h"
27 #include "gx_widget.h"
28 #include "gx_window.h"
29 #include "gx_system.h"
30 #include "gx_scrollbar.h"
31 
32 /**************************************************************************/
33 /*                                                                        */
34 /*  FUNCTION                                               RELEASE        */
35 /*                                                                        */
36 /*    _gx_horizontal_list_selected_visible                PORTABLE C      */
37 /*                                                           6.1          */
38 /*  AUTHOR                                                                */
39 /*                                                                        */
40 /*    Kenneth Maxwell, Microsoft Corporation                              */
41 /*                                                                        */
42 /*  DESCRIPTION                                                           */
43 /*                                                                        */
44 /*    This service sets the list entry at the current list index.         */
45 /*                                                                        */
46 /*  INPUT                                                                 */
47 /*                                                                        */
48 /*    horizontal_list                       Horizontal list widget        */
49 /*                                            control block               */
50 /*    list_entry                            Pointer to new list entry     */
51 /*                                                                        */
52 /*  OUTPUT                                                                */
53 /*                                                                        */
54 /*    status                                Completion status             */
55 /*                                                                        */
56 /*  CALLS                                                                 */
57 /*                                                                        */
58 /*    _gx_widget_event_generate             Creates a new GX_EVENT        */
59 /*    _gx_system_dirty_mark                 Mark the widget dirty         */
60 /*                                                                        */
61 /*  CALLED BY                                                             */
62 /*                                                                        */
63 /*    _gx_horizontal_list_event_process                                   */
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_horizontal_list_selected_visible(GX_HORIZONTAL_LIST * list,GX_WIDGET * child)74 VOID _gx_horizontal_list_selected_visible(GX_HORIZONTAL_LIST *list, GX_WIDGET *child)
75 {
76 GX_SCROLLBAR *pScroll;
77 GX_BOOL       update_scroll = GX_FALSE;
78 
79     if (child -> gx_widget_size.gx_rectangle_left < list -> gx_window_client.gx_rectangle_left)
80     {
81         /* need to scroll children down */
82         _gx_horizontal_list_scroll(list, list -> gx_window_client.gx_rectangle_left - child -> gx_widget_size.gx_rectangle_left);
83         update_scroll = GX_TRUE;
84     }
85     else
86     {
87         if (child -> gx_widget_size.gx_rectangle_right > list -> gx_window_client.gx_rectangle_right)
88         {
89             /* need to scroll children up */
90             _gx_horizontal_list_scroll(list, list -> gx_window_client.gx_rectangle_right - child -> gx_widget_size.gx_rectangle_right);
91             update_scroll = GX_TRUE;
92         }
93     }
94 
95     if (update_scroll)
96     {
97         _gx_window_scrollbar_find((GX_WINDOW *)list, GX_TYPE_HORIZONTAL_SCROLL, &pScroll);
98 
99         if (pScroll)
100         {
101             _gx_scrollbar_reset(pScroll, GX_NULL);
102         }
103     }
104 }
105 
106