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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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/** Scroll Wheel Management (Generic Scroll Wheel) */ |
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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_utility.h" |
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#include "gx_scroll_wheel.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_generic_scroll_wheel_up_wrap PORTABLE C */ |
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/* 6.1.7 */ |
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/* AUTHOR */ |
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/* */ |
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/* Ting Zhu, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function scrolls up the generic scroll wheel. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* wheel Generic scroll wheel control */ |
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/* block */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _gx_widget_first_visible_client_child_get */ |
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/* Get the first visible client */ |
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/* _gx_widget_last_visible_client_child_get */ |
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/* Get the last visible client */ |
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/* _gx_utility_rectangle_shift Move a rectangle */ |
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/* [gx_generic_scroll_wheel_callback] Callback to create row item */ |
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/* _gx_widget_resize Resize a widget */ |
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/* _gx_widget_attach Attach a widget to its parent */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* _gx_generic_scroll_wheel_scroll Generic scroll wheel scroll */ |
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/* function */ |
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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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/* 06-02-2021 Ting Zhu Initial Version 6.1.7 */ |
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/* */ |
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/**************************************************************************/ |
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VOID _gx_generic_scroll_wheel_up_wrap(GX_GENERIC_SCROLL_WHEEL *wheel) |
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{ |
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GX_WIDGET *test; |
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GX_WIDGET *check; |
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GX_RECTANGLE newpos; |
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INT index; |
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✓✓ |
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while ((wheel -> gx_generic_scroll_wheel_top_index + wheel -> gx_generic_scroll_wheel_child_count < wheel -> gx_scroll_wheel_total_rows) || |
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✓✓ |
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(wheel -> gx_widget_style & GX_STYLE_WRAP)) |
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{ |
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/* Scrolling up. See if my top widget is already above my client area. */ |
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test = _gx_widget_first_visible_client_child_get((GX_WIDGET *)wheel); |
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✓✓✓✓
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if (test && test -> gx_widget_size.gx_rectangle_bottom < wheel -> gx_widget_size.gx_rectangle_top) |
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{ |
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/* Top widget is above my client area, move it to the bottom. */ |
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check = _gx_widget_last_visible_client_child_get((GX_WIDGET *)wheel); |
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✓✓ |
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if (check) |
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{ |
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_gx_widget_detach(test); |
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newpos = test -> gx_widget_size; |
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_gx_utility_rectangle_shift(&newpos, 0, (GX_VALUE)(check -> gx_widget_size.gx_rectangle_bottom - newpos.gx_rectangle_top + 1)); |
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_gx_widget_resize(test, &newpos); |
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index = wheel -> gx_generic_scroll_wheel_top_index + wheel -> gx_generic_scroll_wheel_child_count; |
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/* Wrap index. */ |
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✓✓ |
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if (index >= wheel -> gx_scroll_wheel_total_rows) |
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{ |
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index -= wheel -> gx_scroll_wheel_total_rows; |
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} |
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wheel -> gx_generic_scroll_wheel_callback(wheel, test, index); |
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_gx_widget_attach((GX_WIDGET *)wheel, test); |
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wheel -> gx_generic_scroll_wheel_top_index++; |
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/* Wrap page index. */ |
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✓✓ |
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if (wheel -> gx_generic_scroll_wheel_top_index >= wheel -> gx_scroll_wheel_total_rows) |
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{ |
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wheel -> gx_generic_scroll_wheel_top_index -= wheel -> gx_scroll_wheel_total_rows; |
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} |
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} |
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else |
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{ |
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break; |
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} |
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} |
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else |
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{ |
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break; |
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} |
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} |
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} |
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