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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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/** Tree View Management (Tree View) */ |
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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_tree_view.h" |
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#include "gx_system.h" |
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#include "gx_window.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_tree_view_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 tree 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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/* tree Pointer to tree view */ |
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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 Change position of a widget */ |
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/* _gx_widget_block_move Move a block of widget area */ |
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/* _gx_window_scrollbar_find Find scrollbar for a widget */ |
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/* _gx_scrollbar_reset Reset scrollbar information */ |
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/* _gx_system_dirty_partial_add Mark partial area of a widget */ |
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/* as dirty */ |
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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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/**************************************************************************/ |
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UINT _gx_tree_view_scroll(GX_TREE_VIEW *tree, GX_VALUE x_scroll, GX_VALUE y_scroll) |
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{ |
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GX_RECTANGLE block; |
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GX_WIDGET *child; |
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GX_SCROLLBAR *scroll; |
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block = tree -> gx_window_client; |
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✓✓ |
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if (!(tree -> gx_widget_style & GX_STYLE_TRANSPARENT) && |
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✓✓ |
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(tree -> gx_widget_style & GX_STYLE_BORDER_THIN)) |
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{ |
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/* Widget with think border have a round corner, which have some effects to block move. */ |
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block.gx_rectangle_right = (GX_VALUE)(block.gx_rectangle_left + 1); |
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_gx_system_dirty_partial_add((GX_WIDGET *)tree, &block); |
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block = tree -> gx_window_client; |
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block.gx_rectangle_bottom = (GX_VALUE)(block.gx_rectangle_top + 1); |
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_gx_system_dirty_partial_add((GX_WIDGET *)tree, &block); |
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block = tree -> gx_window_client; |
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block.gx_rectangle_left = (GX_VALUE)(block.gx_rectangle_left + 2); |
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block.gx_rectangle_top = (GX_VALUE)(block.gx_rectangle_top + 2); |
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} |
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/* Calculate shift values. */ |
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tree -> gx_tree_view_x_shift = (GX_VALUE)(tree -> gx_tree_view_x_shift + x_scroll); |
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tree -> gx_tree_view_y_shift = (GX_VALUE)(tree -> gx_tree_view_y_shift + y_scroll); |
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child = tree -> 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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_gx_widget_block_move((GX_WIDGET *)tree, &block, x_scroll, y_scroll); |
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/* if we have a scrollbar, we need to tell it to re-calculate the thumb position */ |
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scroll = GX_NULL; |
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✓✓ |
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if (x_scroll) |
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{ |
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_gx_window_scrollbar_find((GX_WINDOW *)tree, (USHORT)GX_TYPE_HORIZONTAL_SCROLL, &scroll); |
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} |
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else |
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{ |
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_gx_window_scrollbar_find((GX_WINDOW *)tree, GX_TYPE_VERTICAL_SCROLL, &scroll); |
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} |
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✓✓ |
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if (scroll) |
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{ |
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_gx_scrollbar_reset(scroll, GX_NULL); |
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} |
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return(GX_SUCCESS); |
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} |
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