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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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/** Screen Stack Management (Screen Stack) */ |
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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_widget.h" |
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#include "gx_screen_stack.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_screen_stack_push 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 detaches screen from its parent, and pushes the */ |
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/* old screen pointer and the parent pointer onto the screen stack. */ |
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/* The new screen pointer is then attached to the parent. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* control Pointer of stack entry */ |
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/* screen Screen pointer to push */ |
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/* new_screen Pointer of new screen */ |
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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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/* None */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application 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_screen_stack_push(GX_SCREEN_STACK_CONTROL *control, GX_WIDGET *screen, GX_WIDGET *new_screen) |
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{ |
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INT top; |
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control -> gx_screen_stack_control_top++; |
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top = control -> gx_screen_stack_control_top; |
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✓✓ |
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if (top <= control -> gx_screen_stack_control_max - 1) |
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{ |
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top <<= 1; |
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/* Push the screen and its parent to screen stack. */ |
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control -> gx_screen_stack_control_memory[top] = screen; |
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control -> gx_screen_stack_control_memory[top + 1] = screen -> gx_widget_parent; |
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/* Attach the new screen to the parent. */ |
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_gx_widget_attach(screen -> gx_widget_parent, new_screen); |
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/* Dettached the old screen from its parent. */ |
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_gx_widget_detach(screen); |
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return(GX_SUCCESS); |
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} |
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else |
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{ |
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control -> gx_screen_stack_control_top--; |
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return(GX_FAILURE); |
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} |
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} |
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