1 /*************************************************************************** 2 * Copyright (c) 2024 Microsoft Corporation 3 * 4 * This program and the accompanying materials are made available under the 5 * terms of the MIT License which is available at 6 * https://opensource.org/licenses/MIT. 7 * 8 * SPDX-License-Identifier: MIT 9 **************************************************************************/ 10 11 12 /**************************************************************************/ 13 /**************************************************************************/ 14 /** */ 15 /** GUIX Component */ 16 /** */ 17 /** Scroll Wheel Management (Generic Scroll Wheel) */ 18 /** */ 19 /**************************************************************************/ 20 21 #define GX_SOURCE_CODE 22 23 24 /* Include necessary system files. */ 25 26 #include "gx_api.h" 27 #include "gx_window.h" 28 #include "gx_widget.h" 29 #include "gx_scroll_wheel.h" 30 #include "gx_canvas.h" 31 #include "gx_context.h" 32 #include "gx_utility.h" 33 34 /**************************************************************************/ 35 /* */ 36 /* FUNCTION RELEASE */ 37 /* */ 38 /* _gx_generic_scroll_wheel_draw PORTABLE C */ 39 /* 6.1.7 */ 40 /* AUTHOR */ 41 /* */ 42 /* Ting Zhu, Microsoft Corporation */ 43 /* */ 44 /* DESCRIPTION */ 45 /* */ 46 /* This function draws the generic scroll wheel widget. */ 47 /* */ 48 /* INPUT */ 49 /* */ 50 /* wheel Generic scroll wheel control */ 51 /* block */ 52 /* */ 53 /* OUTPUT */ 54 /* */ 55 /* status Completion status */ 56 /* */ 57 /* CALLS */ 58 /* */ 59 /* _gx_window_background_draw Draw window background */ 60 /* _gx_context_pixelmap_get Get pixelmap by resource ID */ 61 /* _gx_window_client_height_get Get window client height */ 62 /* _gx_window_client_width_get Get window client width */ 63 /* _gx_canvas_pixelmap_tile Tile a pixelmap */ 64 /* _gx_widget_children_draw Draw children of the widget */ 65 /* _gx_widget_first_visible_client_child_get */ 66 /* Get the first visible client */ 67 /* _gx_widget_next_visible_client_child_get */ 68 /* Get the next visible client */ 69 /* */ 70 /* CALLED BY */ 71 /* */ 72 /* Application Code */ 73 /* GUIX Internal Code */ 74 /* */ 75 /* RELEASE HISTORY */ 76 /* */ 77 /* DATE NAME DESCRIPTION */ 78 /* */ 79 /* 06-02-2021 Ting Zhu Initial Version 6.1.7 */ 80 /* */ 81 /**************************************************************************/ _gx_generic_scroll_wheel_draw(GX_GENERIC_SCROLL_WHEEL * wheel)82VOID _gx_generic_scroll_wheel_draw(GX_GENERIC_SCROLL_WHEEL *wheel) 83 { 84 GX_PIXELMAP *map; 85 GX_RECTANGLE selected_area; 86 GX_WIDGET *child; 87 88 /* Draw window background. */ 89 _gx_window_background_draw((GX_WINDOW *)wheel); 90 91 /* Pickup selected background. */ 92 _gx_context_pixelmap_get(wheel -> gx_scroll_wheel_selected_background, &map); 93 94 /* Define selected area. */ 95 selected_area = wheel -> gx_window_client; 96 selected_area.gx_rectangle_top = (GX_VALUE)((selected_area.gx_rectangle_top + selected_area.gx_rectangle_bottom) >> 1); 97 selected_area.gx_rectangle_top = (GX_VALUE)(selected_area.gx_rectangle_top - (wheel -> gx_scroll_wheel_row_height >> 1)); 98 selected_area.gx_rectangle_bottom = (GX_VALUE)(selected_area.gx_rectangle_top + wheel -> gx_scroll_wheel_row_height - 1); 99 100 if (map) 101 { 102 /* Draw selected background. */ 103 _gx_canvas_pixelmap_tile(&selected_area, map); 104 } 105 106 107 if (!(wheel -> gx_widget_status & GX_STATUS_TRACKING_PEN) && 108 (wheel -> gx_scroll_wheel_animation_steps == 0)) 109 { 110 child = _gx_widget_first_visible_client_child_get((GX_WIDGET *)wheel); 111 112 /* The scroll wheel is stop scrolling, set GX_STYLE_DRAW_SELECTED style to the selected widget. */ 113 while (child) 114 { 115 if (selected_area.gx_rectangle_top == child -> gx_widget_size.gx_rectangle_top) 116 { 117 child -> gx_widget_style |= GX_STYLE_DRAW_SELECTED; 118 break; 119 } 120 121 child = _gx_widget_next_visible_client_child_get(child); 122 } 123 } 124 125 /* Draw all children of the generic scroll wheel. */ 126 _gx_widget_children_draw((GX_WIDGET *)wheel); 127 128 /* Draw the overlay pixelmap, if there is one. */ 129 if (wheel -> gx_scroll_wheel_gradient.gx_gradient_pixelmap.gx_pixelmap_data) 130 { 131 _gx_canvas_pixelmap_tile(&wheel -> gx_widget_size, &wheel -> gx_scroll_wheel_gradient.gx_gradient_pixelmap); 132 } 133 } 134 135
