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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_window.h" |
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#include "gx_widget.h" |
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#include "gx_scroll_wheel.h" |
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#include "gx_canvas.h" |
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#include "gx_context.h" |
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#include "gx_utility.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_draw 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 draws the generic scroll wheel widget. */ |
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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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/* status Completion status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _gx_window_background_draw Draw window background */ |
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/* _gx_context_pixelmap_get Get pixelmap by resource ID */ |
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/* _gx_window_client_height_get Get window client height */ |
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/* _gx_window_client_width_get Get window client width */ |
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/* _gx_canvas_pixelmap_tile Tile a pixelmap */ |
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/* _gx_widget_children_draw Draw children of the widget */ |
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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_next_visible_client_child_get */ |
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/* Get the next visible client */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application Code */ |
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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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/* 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_draw(GX_GENERIC_SCROLL_WHEEL *wheel) |
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{ |
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GX_PIXELMAP *map; |
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GX_RECTANGLE selected_area; |
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GX_WIDGET *child; |
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/* Draw window background. */ |
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_gx_window_background_draw((GX_WINDOW *)wheel); |
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/* Pickup selected background. */ |
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_gx_context_pixelmap_get(wheel -> gx_scroll_wheel_selected_background, &map); |
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/* Define selected area. */ |
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selected_area = wheel -> gx_window_client; |
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selected_area.gx_rectangle_top = (GX_VALUE)((selected_area.gx_rectangle_top + selected_area.gx_rectangle_bottom) >> 1); |
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selected_area.gx_rectangle_top = (GX_VALUE)(selected_area.gx_rectangle_top - (wheel -> gx_scroll_wheel_row_height >> 1)); |
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selected_area.gx_rectangle_bottom = (GX_VALUE)(selected_area.gx_rectangle_top + wheel -> gx_scroll_wheel_row_height - 1); |
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✓✓ |
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if (map) |
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{ |
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/* Draw selected background. */ |
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_gx_canvas_pixelmap_tile(&selected_area, map); |
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} |
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✓✓ |
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if (!(wheel -> gx_widget_status & GX_STATUS_TRACKING_PEN) && |
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✓✓ |
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(wheel -> gx_scroll_wheel_animation_steps == 0)) |
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{ |
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child = _gx_widget_first_visible_client_child_get((GX_WIDGET *)wheel); |
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/* The scroll wheel is stop scrolling, set GX_STYLE_DRAW_SELECTED style to the selected widget. */ |
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✓✓ |
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while (child) |
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{ |
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✓✓ |
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if (selected_area.gx_rectangle_top == child -> gx_widget_size.gx_rectangle_top) |
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{ |
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child -> gx_widget_style |= GX_STYLE_DRAW_SELECTED; |
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break; |
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} |
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child = _gx_widget_next_visible_client_child_get(child); |
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} |
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} |
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/* Draw all children of the generic scroll wheel. */ |
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_gx_widget_children_draw((GX_WIDGET *)wheel); |
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/* Draw the overlay pixelmap, if there is one. */ |
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✓✓ |
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if (wheel -> gx_scroll_wheel_gradient.gx_gradient_pixelmap.gx_pixelmap_data) |
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{ |
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_gx_canvas_pixelmap_tile(&wheel -> gx_widget_size, &wheel -> gx_scroll_wheel_gradient.gx_gradient_pixelmap); |
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} |
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} |
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