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 /** Widget Management (Widget) */ 18 /** */ 19 /**************************************************************************/ 20 21 #define GX_SOURCE_CODE 22 23 24 /* Include necessary system files. */ 25 26 #include "gx_api.h" 27 #include "gx_system.h" 28 #include "gx_canvas.h" 29 #include "gx_utility.h" 30 #include "gx_widget.h" 31 32 33 /**************************************************************************/ 34 /* */ 35 /* FUNCTION RELEASE */ 36 /* */ 37 /* _gx_widget_children_draw PORTABLE C */ 38 /* 6.1 */ 39 /* AUTHOR */ 40 /* */ 41 /* Kenneth Maxwell, Microsoft Corporation */ 42 /* */ 43 /* DESCRIPTION */ 44 /* */ 45 /* This service draws all children of widget. */ 46 /* */ 47 /* INPUT */ 48 /* */ 49 /* widget Pointer to widget */ 50 /* */ 51 /* OUTPUT */ 52 /* */ 53 /* None */ 54 /* */ 55 /* CALLS */ 56 /* */ 57 /* _gx_canvas_drawing_complete Complete drawing on canvas */ 58 /* _gx_canvas_drawing_initiate Initiate drawing on canvas */ 59 /* _gx_utility_rectangle_overlap_detect Check for overlap */ 60 /* [gx_widget_draw_function] Child widget drawing function */ 61 /* */ 62 /* CALLED BY */ 63 /* */ 64 /* Application Code */ 65 /* GUIX Internal Code */ 66 /* */ 67 /* RELEASE HISTORY */ 68 /* */ 69 /* DATE NAME DESCRIPTION */ 70 /* */ 71 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ 72 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ 73 /* resulting in version 6.1 */ 74 /* */ 75 /**************************************************************************/ _gx_widget_children_draw(GX_WIDGET * widget)76VOID _gx_widget_children_draw(GX_WIDGET *widget) 77 { 78 UINT status; 79 GX_WIDGET *child; 80 GX_CANVAS *canvas; 81 GX_DRAW_CONTEXT *context; 82 GX_RECTANGLE *dirty_area; 83 GX_RECTANGLE overlap; 84 85 /* Pickup the first child. */ 86 child = widget -> gx_widget_first_child; 87 88 if (!child) 89 { 90 return; 91 } 92 93 /* pick up the current context */ 94 context = _gx_system_current_draw_context; 95 96 /* pickup the current canvas */ 97 98 canvas = context -> gx_draw_context_canvas; 99 dirty_area = &(context -> gx_draw_context_dirty); 100 101 /* Draw all the child widgets that overlap the clipping area. */ 102 103 while (child) 104 { 105 if (child -> gx_widget_status & GX_STATUS_VISIBLE) 106 { 107 if (_gx_utility_rectangle_overlap_detect(&child -> gx_widget_clip, dirty_area, &overlap)) 108 { 109 /* Initiate drawing on this canvas. */ 110 status = _gx_canvas_drawing_initiate(canvas, child, &overlap); 111 112 if (status == GX_SUCCESS) 113 { 114 /* Yes, draw the child widget. */ 115 child -> gx_widget_draw_function(child); 116 _gx_canvas_drawing_complete(canvas, GX_FALSE); 117 } 118 else 119 { 120 if (status == GX_NO_VIEWS) 121 { 122 /* Complete drawing on this canvas. */ 123 _gx_canvas_drawing_complete(canvas, GX_FALSE); 124 } 125 } 126 } 127 } 128 129 /* Move to next child. */ 130 child = child -> gx_widget_next; 131 } 132 } 133 134
