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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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/** Tree View Management (Menu) */ |
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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_tree_view.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_tree_view_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 function gets the tree view scroll information. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* tree Pointer to tree view control */ |
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/* block */ |
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/* type GX_SCROLLBAR_HORIZONTAL */ |
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/* or GX_SCROLLBAR_VERTICAL */ |
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/* 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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/* _gx_tree_view_scroll Scroll tree view client area */ |
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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_tree_view_scroll_info_get(GX_TREE_VIEW *tree, ULONG type, GX_SCROLL_INFO *info) |
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{ |
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GX_RECTANGLE *client; |
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INT shift; |
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INT value; |
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client = &tree -> gx_window_client; |
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✓✓ |
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if (type & GX_SCROLLBAR_VERTICAL) |
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{ |
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info -> gx_scroll_minimum = client -> gx_rectangle_top; |
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info -> gx_scroll_maximum = info -> gx_scroll_minimum + tree -> gx_tree_view_tree_height - 1; |
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info -> gx_scroll_visible = (GX_VALUE)(client -> gx_rectangle_bottom - client -> gx_rectangle_top + 1); |
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✓✓ |
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if (tree -> gx_tree_view_tree_height < info -> gx_scroll_visible) |
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{ |
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info -> gx_scroll_maximum = info -> gx_scroll_minimum + info -> gx_scroll_visible - 1; |
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} |
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shift = tree -> gx_tree_view_y_shift; |
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value = client -> gx_rectangle_top - shift; |
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✓✓ |
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if (value < info -> gx_scroll_minimum) |
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{ |
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value = info -> gx_scroll_minimum; |
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} |
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✓✓ |
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else if (value > info -> gx_scroll_maximum - info -> gx_scroll_visible + 1) |
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{ |
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value = info -> gx_scroll_maximum - info -> gx_scroll_visible + 1; |
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} |
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shift = client -> gx_rectangle_top - value; |
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✓✓ |
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if (shift != tree -> gx_tree_view_y_shift) |
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{ |
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_gx_tree_view_scroll(tree, 0, (GX_VALUE)(shift - tree->gx_tree_view_y_shift)); |
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} |
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info -> gx_scroll_value = value; |
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} |
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else |
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{ |
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info -> gx_scroll_minimum = client -> gx_rectangle_left; |
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info -> gx_scroll_maximum = info -> gx_scroll_minimum + tree -> gx_tree_view_tree_width - 1; |
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info -> gx_scroll_visible = (GX_VALUE)(client -> gx_rectangle_right - client -> gx_rectangle_left + 1); |
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✓✓ |
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if (tree -> gx_tree_view_tree_width < info -> gx_scroll_visible) |
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{ |
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info -> gx_scroll_maximum = info -> gx_scroll_minimum + info -> gx_scroll_visible - 1; |
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} |
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shift = tree -> gx_tree_view_x_shift; |
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value = client -> gx_rectangle_left - shift; |
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✓✓ |
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if (value < info -> gx_scroll_minimum) |
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{ |
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value = info -> gx_scroll_minimum; |
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} |
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✓✓ |
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else if (value > info -> gx_scroll_maximum - info -> gx_scroll_visible + 1) |
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{ |
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value = info -> gx_scroll_maximum - info -> gx_scroll_visible + 1; |
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} |
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shift = client -> gx_rectangle_left - value; |
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✓✓ |
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if (shift != tree -> gx_tree_view_x_shift) |
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{ |
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_gx_tree_view_scroll(tree, (GX_VALUE)(shift - tree->gx_tree_view_x_shift), 0); |
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} |
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info -> gx_scroll_value = value; |
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} |
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info -> gx_scroll_increment = (GX_VALUE)(info -> gx_scroll_maximum - info -> gx_scroll_minimum) / 10; |
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return(GX_SUCCESS); |
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} |
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