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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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/** 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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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_window_scroll_info_get 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 gets the window scroll information. */ |
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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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/* type GX_SCROLLBAR_HORIZONTAL */ |
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/* or GX_SCROLLBAR_VERTICAL */ |
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/* return_scroll_info Pointer to destination for */ |
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/* scroll info */ |
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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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/* 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_window_scroll_info_get(GX_WINDOW *window, ULONG type, GX_SCROLL_INFO *return_scroll_info) |
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{ |
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GX_WIDGET *child; |
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/* default scroll information is to gather the limits of my child |
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widgets, so that they can all be scrolled into view |
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*/ |
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return_scroll_info -> gx_scroll_increment = 1; |
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✓✓ |
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if (type & GX_SCROLLBAR_VERTICAL) |
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{ |
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return_scroll_info -> gx_scroll_maximum = window -> gx_window_client.gx_rectangle_bottom; |
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return_scroll_info -> gx_scroll_minimum = window -> gx_window_client.gx_rectangle_top; |
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return_scroll_info -> gx_scroll_visible = (GX_VALUE)(return_scroll_info -> gx_scroll_maximum - return_scroll_info -> gx_scroll_minimum + 1); |
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return_scroll_info -> gx_scroll_value = window -> gx_window_client.gx_rectangle_top; |
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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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✓✓ |
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if (child -> gx_widget_size.gx_rectangle_top < return_scroll_info -> gx_scroll_minimum) |
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{ |
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return_scroll_info -> gx_scroll_minimum = child -> gx_widget_size.gx_rectangle_top; |
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} |
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✓✓ |
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if (child -> gx_widget_size.gx_rectangle_bottom > return_scroll_info -> gx_scroll_maximum) |
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{ |
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return_scroll_info -> gx_scroll_maximum = child -> gx_widget_size.gx_rectangle_bottom; |
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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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} |
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else |
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{ |
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return_scroll_info -> gx_scroll_maximum = window -> gx_window_client.gx_rectangle_right; |
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return_scroll_info -> gx_scroll_minimum = window -> gx_window_client.gx_rectangle_left; |
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return_scroll_info -> gx_scroll_visible = (GX_VALUE)(return_scroll_info -> gx_scroll_maximum - return_scroll_info -> gx_scroll_minimum + 1); |
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return_scroll_info -> gx_scroll_value = window -> gx_window_client.gx_rectangle_left; |
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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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✓✓ |
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if (child -> gx_widget_size.gx_rectangle_left < return_scroll_info -> gx_scroll_minimum) |
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{ |
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return_scroll_info -> gx_scroll_minimum = child -> gx_widget_size.gx_rectangle_left; |
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} |
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✓✓ |
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if (child -> gx_widget_size.gx_rectangle_right > return_scroll_info -> gx_scroll_maximum) |
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{ |
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return_scroll_info -> gx_scroll_maximum = child -> gx_widget_size.gx_rectangle_right; |
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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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} |
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return_scroll_info -> gx_scroll_increment = (GX_VALUE)(return_scroll_info -> gx_scroll_maximum - return_scroll_info -> gx_scroll_minimum) / 10; |
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return(GX_SUCCESS); |
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} |
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