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 /** Scroll Wheel Management (Generic Scroll Wheel) */ 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_utility.h" 31 #include "gx_scrollbar.h" 32 #include "gx_scroll_wheel.h" 33 34 /**************************************************************************/ 35 /* */ 36 /* FUNCTION RELEASE */ 37 /* */ 38 /* _gx_generic_scroll_wheel_total_rows_set PORTABLE C */ 39 /* 6.1.7 */ 40 /* AUTHOR */ 41 /* */ 42 /* Ting Zhu, Microsoft Corporation */ 43 /* */ 44 /* DESCRIPTION */ 45 /* */ 46 /* This function assigns total number of the generic scroll wheel. */ 47 /* */ 48 /* INPUT */ 49 /* */ 50 /* wheel Scroll Wheel control block */ 51 /* count Number of rows */ 52 /* */ 53 /* OUTPUT */ 54 /* */ 55 /* status Completion status */ 56 /* */ 57 /* CALLS */ 58 /* */ 59 /* _gx_widget_hide Hide a widget */ 60 /* _gx_widget_first_visible_client_child_get */ 61 /* Get the first visible client */ 62 /* _gx_widget_next_visible_client_child_get */ 63 /* Get the next visible client */ 64 /* _gx_generic_scroll_wheel_children_position */ 65 /* Position the children of the */ 66 /* generic scroll wheel */ 67 /* _gx_system_dirty_mark Mark the widget dirty */ 68 /* */ 69 /* CALLED BY */ 70 /* */ 71 /* GUIX Internal Code */ 72 /* */ 73 /* RELEASE HISTORY */ 74 /* */ 75 /* DATE NAME DESCRIPTION */ 76 /* */ 77 /* 06-02-2021 Ting Zhu Initial Version 6.1.7 */ 78 /* */ 79 /**************************************************************************/ _gx_generic_scroll_wheel_total_rows_set(GX_GENERIC_SCROLL_WHEEL * wheel,INT count)80UINT _gx_generic_scroll_wheel_total_rows_set(GX_GENERIC_SCROLL_WHEEL *wheel, INT count) 81 { 82 INT row; 83 GX_WIDGET *test; 84 85 /* Update total count of rows. */ 86 wheel -> gx_scroll_wheel_total_rows = count; 87 88 /* Update selected row. */ 89 if (count == 0) 90 { 91 wheel -> gx_scroll_wheel_selected_row = 0; 92 } 93 else if (wheel -> gx_scroll_wheel_selected_row >= count) 94 { 95 wheel -> gx_scroll_wheel_selected_row = count - 1; 96 } 97 98 /* Rreset child count and make all children visible. */ 99 wheel -> gx_generic_scroll_wheel_child_count = 0; 100 101 test = _gx_widget_first_client_child_get((GX_WIDGET *)wheel); 102 103 while (test) 104 { 105 if (!(test->gx_widget_status & GX_STATUS_VISIBLE)) 106 { 107 _gx_widget_show(test); 108 } 109 110 wheel->gx_generic_scroll_wheel_child_count++; 111 112 test = _gx_widget_next_client_child_get(test); 113 } 114 115 test = wheel -> gx_widget_last_child; 116 117 /* Check whether list child count is larger than count. */ 118 while (test && (wheel -> gx_generic_scroll_wheel_child_count > count)) 119 { 120 if (!(test -> gx_widget_status & GX_STATUS_NONCLIENT)) 121 { 122 _gx_widget_hide(test); 123 wheel -> gx_generic_scroll_wheel_child_count--; 124 } 125 126 test = test -> gx_widget_previous; 127 } 128 129 wheel -> gx_generic_scroll_wheel_top_index = 0; 130 131 if (wheel -> gx_generic_scroll_wheel_callback) 132 { 133 134 /* Re-populate list child. */ 135 row = 0; 136 137 test = _gx_widget_first_visible_client_child_get((GX_WIDGET *)wheel); 138 139 while (test) 140 { 141 /* Reset child id. */ 142 test -> gx_widget_style &= ~GX_STYLE_DRAW_SELECTED; 143 wheel -> gx_generic_scroll_wheel_callback(wheel, test, row++); 144 145 test = _gx_widget_next_visible_client_child_get(test); 146 } 147 } 148 149 _gx_generic_scroll_wheel_children_position(wheel); 150 151 /* Refresh screen. */ 152 if (wheel -> gx_widget_status & GX_STATUS_VISIBLE) 153 { 154 _gx_system_dirty_mark((GX_WIDGET *)wheel); 155 } 156 return GX_SUCCESS; 157 } 158 159
