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_canvas.h" 30 #include "gx_utility.h" 31 #include "gx_widget.h" 32 33 34 /**************************************************************************/ 35 /* */ 36 /* FUNCTION RELEASE */ 37 /* */ 38 /* _gx_widget_children_draw PORTABLE C */ 39 /* 6.1 */ 40 /* AUTHOR */ 41 /* */ 42 /* Kenneth Maxwell, Microsoft Corporation */ 43 /* */ 44 /* DESCRIPTION */ 45 /* */ 46 /* This service draws all children of widget. */ 47 /* */ 48 /* INPUT */ 49 /* */ 50 /* widget Pointer to widget */ 51 /* */ 52 /* OUTPUT */ 53 /* */ 54 /* None */ 55 /* */ 56 /* CALLS */ 57 /* */ 58 /* _gx_canvas_drawing_complete Complete drawing on canvas */ 59 /* _gx_canvas_drawing_initiate Initiate drawing on canvas */ 60 /* _gx_utility_rectangle_overlap_detect Check for overlap */ 61 /* [gx_widget_draw_function] Child widget drawing function */ 62 /* */ 63 /* CALLED BY */ 64 /* */ 65 /* Application Code */ 66 /* GUIX Internal Code */ 67 /* */ 68 /* RELEASE HISTORY */ 69 /* */ 70 /* DATE NAME DESCRIPTION */ 71 /* */ 72 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ 73 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ 74 /* resulting in version 6.1 */ 75 /* */ 76 /**************************************************************************/ _gx_widget_children_draw(GX_WIDGET * widget)77VOID _gx_widget_children_draw(GX_WIDGET *widget) 78 { 79 UINT status; 80 GX_WIDGET *child; 81 GX_CANVAS *canvas; 82 GX_DRAW_CONTEXT *context; 83 GX_RECTANGLE *dirty_area; 84 GX_RECTANGLE overlap; 85 86 /* Pickup the first child. */ 87 child = widget -> gx_widget_first_child; 88 89 if (!child) 90 { 91 return; 92 } 93 94 /* pick up the current context */ 95 context = _gx_system_current_draw_context; 96 97 /* pickup the current canvas */ 98 99 canvas = context -> gx_draw_context_canvas; 100 dirty_area = &(context -> gx_draw_context_dirty); 101 102 /* Draw all the child widgets that overlap the clipping area. */ 103 104 while (child) 105 { 106 if (child -> gx_widget_status & GX_STATUS_VISIBLE) 107 { 108 if (_gx_utility_rectangle_overlap_detect(&child -> gx_widget_clip, dirty_area, &overlap)) 109 { 110 /* Initiate drawing on this canvas. */ 111 status = _gx_canvas_drawing_initiate(canvas, child, &overlap); 112 113 if (status == GX_SUCCESS) 114 { 115 /* Yes, draw the child widget. */ 116 child -> gx_widget_draw_function(child); 117 _gx_canvas_drawing_complete(canvas, GX_FALSE); 118 } 119 else 120 { 121 if (status == GX_NO_VIEWS) 122 { 123 /* Complete drawing on this canvas. */ 124 _gx_canvas_drawing_complete(canvas, GX_FALSE); 125 } 126 } 127 } 128 } 129 130 /* Move to next child. */ 131 child = child -> gx_widget_next; 132 } 133 } 134 135
