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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** GUIX Component */ |
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/** */ |
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/** Widget Management (Widget) */ |
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/** */ |
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/**************************************************************************/ |
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#define GX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "gx_api.h" |
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#include "gx_system.h" |
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#include "gx_utility.h" |
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#include "gx_widget.h" |
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#include "gx_window.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_widget_front_move PORTABLE C */ |
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/* 6.1 */ |
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/* AUTHOR */ |
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/* */ |
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/* Kenneth Maxwell, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function moves the widget to the front. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* widget Pointer to widget to move */ |
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/* return_moved Pointer to destination for */ |
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/* indication widget was moved */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* status Completion status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _gx_system_dirty_partial_add Add dirty area */ |
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/* _gx_utility_rectangle_combine Combine rectangles */ |
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/* _gx_utility_rectangle_define Define rectangle */ |
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/* _gx_utility_rectangle_overlap_detect Check for overlap */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application Code */ |
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/* GUIX Internal Code */ |
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/* */ |
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/* RELEASE HISTORY */ |
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/* */ |
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/* DATE NAME DESCRIPTION */ |
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/* */ |
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/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ |
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/* 09-30-2020 Kenneth Maxwell Modified comment(s), */ |
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/* resulting in version 6.1 */ |
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/* */ |
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/**************************************************************************/ |
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UINT _gx_widget_front_move(GX_WIDGET *widget, GX_BOOL *return_moved) |
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{ |
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GX_WIDGET *parent; |
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GX_WIDGET *sibling; |
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GX_RECTANGLE dirty_area; |
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GX_RECTANGLE overlap; |
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/* Pickup parent widget. */ |
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parent = widget -> gx_widget_parent; |
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/* Is parent valid? */ |
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✓✓ |
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if (!parent) |
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{ |
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/* Return error. */ |
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return(GX_PTR_ERROR); |
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} |
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/* First check to see if the widget is already in front. */ |
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✓✓ |
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if (parent -> gx_widget_last_child == widget) |
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{ |
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/* Yes, widget is already in front, so nothing to do. */ |
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/* Return no change. */ |
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return(GX_NO_CHANGE); |
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} |
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/* Relink widget to the end |
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1) Determine what to dirty, all or partial |
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2) unlink and stitch linked list |
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3) relink to the end |
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4) call dirty so that I will get redraw |
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*/ |
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_gx_utility_rectangle_define(&dirty_area, GX_VALUE_MAX, GX_VALUE_MAX, -1, -1); |
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/* Pickup sibling widget. */ |
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sibling = widget -> gx_widget_next; |
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/* Traverse the sibling list. */ |
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✓✓ |
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while (sibling) |
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{ |
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/* Check for an overlap of siblings. */ |
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✓✓ |
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if (_gx_utility_rectangle_overlap_detect(&widget -> gx_widget_size, &sibling -> gx_widget_size, &overlap)) |
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{ |
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/* Yes, calculate the dirty area. */ |
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✓✓ |
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if (dirty_area.gx_rectangle_left > dirty_area.gx_rectangle_right) |
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{ |
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dirty_area = overlap; |
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} |
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else |
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{ |
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_gx_utility_rectangle_combine(&dirty_area, &overlap); |
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} |
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} |
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/* Move to next sibling. */ |
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sibling = sibling -> gx_widget_next; |
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} |
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✓✓ |
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if (dirty_area.gx_rectangle_left <= dirty_area.gx_rectangle_right) |
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{ |
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/* Add dirty area. */ |
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_gx_system_dirty_partial_add(widget, &dirty_area); |
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} |
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/* Is widget the first child of it's parent? */ |
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✓✓ |
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if (parent -> gx_widget_first_child == widget) |
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{ |
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/* Yes, the first child, easy remove the first child. */ |
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parent -> gx_widget_first_child = widget -> gx_widget_next; |
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widget -> gx_widget_next -> gx_widget_previous = NULL; |
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} |
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else |
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{ |
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/* No, not the first child. Remove from the middle. */ |
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widget -> gx_widget_previous -> gx_widget_next = widget -> gx_widget_next; |
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widget -> gx_widget_next -> gx_widget_previous = widget -> gx_widget_previous; |
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} |
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/* Link the widget to the end of the list. */ |
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sibling = parent -> gx_widget_last_child; |
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sibling -> gx_widget_next = widget; |
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widget -> gx_widget_previous = sibling; |
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widget -> gx_widget_next = NULL; |
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parent -> gx_widget_last_child = widget; |
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✓✓ |
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if (widget -> gx_widget_type >= GX_TYPE_WINDOW) |
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{ |
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/* if parent is root window, then viewports need to be updated */ |
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_gx_window_view_update_detect((GX_WINDOW *)widget); |
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/* if window accepts focus and parent has focus, focus should be moved */ |
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✓✓ |
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if (parent -> gx_widget_status & GX_STATUS_HAS_FOCUS && |
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✓✓ |
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(widget -> gx_widget_status & GX_STATUS_ACCEPTS_FOCUS) && |
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✓✓ |
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!(widget -> gx_widget_status & GX_STATUS_HAS_FOCUS)) |
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{ |
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_gx_system_focus_claim(widget); |
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} |
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} |
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/* Indicate the widget was moved. */ |
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✓✓ |
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if (return_moved) |
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{ |
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*return_moved = GX_TRUE; |
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} |
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/* Return successful completion. */ |
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return(GX_SUCCESS); |
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} |
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