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 /** Widget Management (Widget) */ 19 /** */ 20 /**************************************************************************/ 21 22 #define GX_SOURCE_CODE 23 24 25 /* Include necessary system files. */ 26 27 #include "gx_api.h" 28 #include "gx_system.h" 29 #include "gx_widget.h" 30 #include "gx_utility.h" 31 32 33 /**************************************************************************/ 34 /* */ 35 /* FUNCTION RELEASE */ 36 /* */ 37 /* _gx_widget_link PORTABLE C */ 38 /* 6.1 */ 39 /* AUTHOR */ 40 /* */ 41 /* Kenneth Maxwell, Microsoft Corporation */ 42 /* */ 43 /* DESCRIPTION */ 44 /* */ 45 /* This function links a child widget to it's parent */ 46 /* */ 47 /* INPUT */ 48 /* */ 49 /* parent The parent widget */ 50 /* widget The child widget */ 51 /* */ 52 /* OUTPUT */ 53 /* */ 54 /* status Completion status */ 55 /* */ 56 /* CALLS */ 57 /* */ 58 /* _gx_widget_unlink Unlink from previous parent */ 59 /* _gx_widget_show Show the widget */ 60 /* */ 61 /* CALLED BY */ 62 /* */ 63 /* GUIX Internal Code */ 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_widget_link(GX_WIDGET * parent,GX_WIDGET * widget)74VOID _gx_widget_link(GX_WIDGET *parent, GX_WIDGET *widget) 75 { 76 GX_WIDGET *sibling; 77 78 /* if this widget already has a different parent, then first unlink it */ 79 if (widget -> gx_widget_parent) 80 { 81 if (widget -> gx_widget_parent == parent) 82 { 83 /* already linked as child of this parent, nothing to do */ 84 return; 85 } 86 _gx_widget_unlink(widget); 87 } 88 89 /* Determine if a parent widget was provided. */ 90 if (parent) 91 { 92 /* Yes, is there already a child for this parent? */ 93 if (parent -> gx_widget_first_child) 94 { 95 /* Yes, find the last child. */ 96 sibling = parent -> gx_widget_last_child; 97 98 /* Put this widget at the end of the list. */ 99 sibling -> gx_widget_next = widget; 100 widget -> gx_widget_previous = sibling; 101 widget -> gx_widget_next = NULL; 102 } 103 else 104 { 105 106 /* First child, simply add the widget. */ 107 parent -> gx_widget_first_child = widget; 108 } 109 110 /* Setup the last child pointer and remember the parent widget. */ 111 parent -> gx_widget_last_child = widget; 112 widget -> gx_widget_parent = parent; 113 114 if (parent -> gx_widget_status & GX_STATUS_VISIBLE) 115 { 116 _gx_widget_show(widget); 117 } 118 } 119 } 120 121
