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 #define GX_SNAP_TIMER 1000 33 #define GX_FLICK_TIMER 1001 34 35 /**************************************************************************/ 36 /* */ 37 /* FUNCTION RELEASE */ 38 /* */ 39 /* _gx_horizontal_list_slide_back_check PORTABLE C */ 40 /* 6.1 */ 41 /* AUTHOR */ 42 /* */ 43 /* Kenneth Maxwell, Microsoft Corporation */ 44 /* */ 45 /* DESCRIPTION */ 46 /* */ 47 /* This function checks the sliding back of the scrollbar. */ 48 /* */ 49 /* INPUT */ 50 /* */ 51 /* list Horizontal list widget */ 52 /* control block */ 53 /* */ 54 /* OUTPUT */ 55 /* */ 56 /* None */ 57 /* */ 58 /* CALLS */ 59 /* */ 60 /* _gx_first_client_child_get Get the first client child */ 61 /* _gx_system_timer_start Allocate a free timer and */ 62 /* activates it */ 63 /* _gx_last_client_child_get Get the last client child */ 64 /* */ 65 /* CALLED BY */ 66 /* */ 67 /* _gx_horizontal_list_event_process */ 68 /* sw_horizontal_list_event_process */ 69 /* */ 70 /* RELEASE HISTORY */ 71 /* */ 72 /* DATE NAME DESCRIPTION */ 73 /* */ 74 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ 75 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ 76 /* resulting in version 6.1 */ 77 /* */ 78 /**************************************************************************/ _gx_horizontal_list_slide_back_check(GX_HORIZONTAL_LIST * list)79VOID _gx_horizontal_list_slide_back_check(GX_HORIZONTAL_LIST *list) 80 { 81 GX_WIDGET *child; 82 INT page_index; 83 84 if (list -> gx_horizontal_list_child_count <= 0) 85 { 86 return; 87 } 88 89 /* Calculate page index. */ 90 page_index = list -> gx_horizontal_list_top_index; 91 92 child = _gx_widget_first_client_child_get((GX_WIDGET *)list); 93 94 while (child && (child -> gx_widget_size.gx_rectangle_left <= list -> gx_widget_size.gx_rectangle_left)) 95 { 96 page_index++; 97 child = _gx_widget_next_client_child_get(child); 98 } 99 100 list -> gx_horizontal_list_snap_back_distance = 0; 101 102 if (page_index == 0) 103 { 104 child = _gx_widget_first_client_child_get((GX_WIDGET *)list); 105 if (child && (child -> gx_widget_size.gx_rectangle_left > list -> gx_window_client.gx_rectangle_left)) 106 { 107 list -> gx_horizontal_list_snap_back_distance = (GX_VALUE)(list -> gx_window_client.gx_rectangle_left - 108 child -> gx_widget_size.gx_rectangle_left); 109 _gx_system_timer_start((GX_WIDGET *)list, GX_SNAP_TIMER, 1, 1); 110 } 111 } 112 else 113 { 114 if (list -> gx_horizontal_list_top_index + list -> gx_horizontal_list_child_count >= list -> gx_horizontal_list_total_columns - 1) 115 { 116 child = _gx_widget_last_client_child_get((GX_WIDGET *)list); 117 if (child && (child -> gx_widget_size.gx_rectangle_right < list -> gx_window_client.gx_rectangle_right)) 118 { 119 list -> gx_horizontal_list_snap_back_distance = (GX_VALUE)(list -> gx_window_client.gx_rectangle_right - 120 child -> gx_widget_size.gx_rectangle_right); 121 _gx_system_timer_start((GX_WIDGET *)list, GX_SNAP_TIMER, 1, 1); 122 } 123 } 124 } 125 } 126 127
