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_utility.h" 29 #include "gx_scroll_wheel.h" 30 31 /**************************************************************************/ 32 /* */ 33 /* FUNCTION RELEASE */ 34 /* */ 35 /* _gx_generic_scroll_wheel_up_wrap PORTABLE C */ 36 /* 6.1.7 */ 37 /* AUTHOR */ 38 /* */ 39 /* Ting Zhu, Microsoft Corporation */ 40 /* */ 41 /* DESCRIPTION */ 42 /* */ 43 /* This function scrolls up the generic scroll wheel. */ 44 /* */ 45 /* INPUT */ 46 /* */ 47 /* wheel Generic scroll wheel control */ 48 /* block */ 49 /* */ 50 /* OUTPUT */ 51 /* */ 52 /* None */ 53 /* */ 54 /* CALLS */ 55 /* */ 56 /* _gx_widget_first_visible_client_child_get */ 57 /* Get the first visible client */ 58 /* _gx_widget_last_visible_client_child_get */ 59 /* Get the last visible client */ 60 /* _gx_utility_rectangle_shift Move a rectangle */ 61 /* [gx_generic_scroll_wheel_callback] Callback to create row item */ 62 /* _gx_widget_resize Resize a widget */ 63 /* _gx_widget_attach Attach a widget to its parent */ 64 /* */ 65 /* CALLED BY */ 66 /* */ 67 /* _gx_generic_scroll_wheel_scroll Generic scroll wheel scroll */ 68 /* function */ 69 /* */ 70 /* RELEASE HISTORY */ 71 /* */ 72 /* DATE NAME DESCRIPTION */ 73 /* */ 74 /* 06-02-2021 Ting Zhu Initial Version 6.1.7 */ 75 /* */ 76 /**************************************************************************/ _gx_generic_scroll_wheel_up_wrap(GX_GENERIC_SCROLL_WHEEL * wheel)77VOID _gx_generic_scroll_wheel_up_wrap(GX_GENERIC_SCROLL_WHEEL *wheel) 78 { 79 GX_WIDGET *test; 80 GX_WIDGET *check; 81 GX_RECTANGLE newpos; 82 INT index; 83 84 while ((wheel -> gx_generic_scroll_wheel_top_index + wheel -> gx_generic_scroll_wheel_child_count < wheel -> gx_scroll_wheel_total_rows) || 85 (wheel -> gx_widget_style & GX_STYLE_WRAP)) 86 { 87 88 /* Scrolling up. See if my top widget is already above my client area. */ 89 90 test = _gx_widget_first_visible_client_child_get((GX_WIDGET *)wheel); 91 92 if (test && test -> gx_widget_size.gx_rectangle_bottom < wheel -> gx_widget_size.gx_rectangle_top) 93 { 94 95 /* Top widget is above my client area, move it to the bottom. */ 96 check = _gx_widget_last_visible_client_child_get((GX_WIDGET *)wheel); 97 98 if (check) 99 { 100 _gx_widget_detach(test); 101 102 newpos = test -> gx_widget_size; 103 _gx_utility_rectangle_shift(&newpos, 0, (GX_VALUE)(check -> gx_widget_size.gx_rectangle_bottom - newpos.gx_rectangle_top + 1)); 104 _gx_widget_resize(test, &newpos); 105 106 index = wheel -> gx_generic_scroll_wheel_top_index + wheel -> gx_generic_scroll_wheel_child_count; 107 108 /* Wrap index. */ 109 if (index >= wheel -> gx_scroll_wheel_total_rows) 110 { 111 index -= wheel -> gx_scroll_wheel_total_rows; 112 } 113 114 wheel -> gx_generic_scroll_wheel_callback(wheel, test, index); 115 116 _gx_widget_attach((GX_WIDGET *)wheel, test); 117 wheel -> gx_generic_scroll_wheel_top_index++; 118 119 /* Wrap page index. */ 120 if (wheel -> gx_generic_scroll_wheel_top_index >= wheel -> gx_scroll_wheel_total_rows) 121 { 122 wheel -> gx_generic_scroll_wheel_top_index -= wheel -> gx_scroll_wheel_total_rows; 123 } 124 } 125 else 126 { 127 break; 128 } 129 } 130 else 131 { 132 break; 133 } 134 } 135 } 136 137
