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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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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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/** Window Management (Window) */ |
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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_window.h" |
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#include "gx_system.h" |
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#include "gx_display.h" |
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#include "gx_canvas.h" |
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#include "gx_utility.h" |
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#include "gx_scrollbar.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_window_scroll 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 service scrolls the window client area by the specified amount */ |
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/* */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* window Pointer to window */ |
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/* x_scroll Amount to scroll on x-axis */ |
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/* y_scroll Amount to scroll on y-axis */ |
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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_widget_scroll_shift Widget scroll shift */ |
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/* _gx_widget_block_move Widget block move */ |
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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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/**************************************************************************/ |
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UINT _gx_window_scroll(GX_WINDOW *window, GX_VALUE x_scroll, GX_VALUE y_scroll) |
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{ |
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GX_WIDGET *child = window -> gx_widget_first_child; |
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GX_BOOL has_transparent_nonclient_children = GX_FALSE; |
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/* if this window is not visible than nothing to do */ |
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✓✓ |
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if (!(window -> gx_widget_status & GX_STATUS_VISIBLE)) |
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{ |
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return(GX_SUCCESS); |
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} |
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/* test to determine if transparent non-client children exist */ |
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✓✓ |
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while (child) |
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{ |
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✓✓ |
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if (child -> gx_widget_status & GX_STATUS_NONCLIENT) |
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{ |
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✓✓ |
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if (child -> gx_widget_style & GX_STYLE_TRANSPARENT) |
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{ |
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has_transparent_nonclient_children = GX_TRUE; |
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break; |
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} |
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} |
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child = child -> gx_widget_next; |
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} |
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/* reset to first child */ |
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child = window -> gx_widget_first_child; |
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✓✓ |
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while (child) |
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{ |
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✓✓ |
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if (!(child -> gx_widget_status & GX_STATUS_NONCLIENT)) |
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{ |
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_gx_widget_scroll_shift(child, x_scroll, y_scroll, GX_TRUE); |
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} |
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child = child -> gx_widget_next; |
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} |
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✓✓ |
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if (has_transparent_nonclient_children) |
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{ |
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/* In this case we cannot use block-move. Just shift all child widgets */ |
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_gx_system_dirty_partial_add((GX_WIDGET *)window, &window -> gx_window_client); |
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} |
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else |
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{ |
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/* here if we can do faster scrolling using block-move function */ |
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_gx_widget_block_move((GX_WIDGET *)window, &window -> gx_window_client, x_scroll, y_scroll); |
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} |
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return(GX_SUCCESS); |
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} |
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