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 /** Scrollbar Management (Scrollbar) */
18 /** */
19 /**************************************************************************/
20
21 #define GX_SOURCE_CODE
22
23 /* Include necessary system files. */
24
25 #include "gx_api.h"
26 #include "gx_system.h"
27 #include "gx_display.h"
28 #include "gx_context.h"
29 #include "gx_widget.h"
30 #include "gx_utility.h"
31 #include "gx_scrollbar.h"
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _gx_scrollbar_size_update PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Kenneth Maxwell, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* Calculate and return the position of a GX_SCROLLBAR thumb button */
46 /* based scrollbar dimensions, current value, and visible range. */
47 /* */
48 /* */
49 /* INPUT */
50 /* */
51 /* scroll Scroll control block */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* None */
56 /* */
57 /* CALLS */
58 /* */
59 /* _gx_widget_border_width_get Obtain widget border width */
60 /* _gx_widget_resize Resize a widget */
61 /* */
62 /* CALLED BY */
63 /* */
64 /* GUIX Internal Code */
65 /* */
66 /* RELEASE HISTORY */
67 /* */
68 /* DATE NAME DESCRIPTION */
69 /* */
70 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
71 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
72 /* resulting in version 6.1 */
73 /* */
74 /**************************************************************************/
_gx_scrollbar_size_update(GX_SCROLLBAR * scroll)75 VOID _gx_scrollbar_size_update(GX_SCROLLBAR *scroll)
76 {
77 GX_WINDOW *parent;
78 GX_RECTANGLE size;
79 GX_VALUE border_width;
80 UINT style = scroll -> gx_widget_style;
81
82 parent = (GX_WINDOW *)scroll -> gx_widget_parent;
83
84 if (parent)
85 {
86 _gx_widget_border_width_get((GX_WIDGET *) parent, &border_width);
87
88 if (style & GX_SCROLLBAR_VERTICAL)
89 {
90 size.gx_rectangle_top = parent -> gx_window_client.gx_rectangle_top;
91 size.gx_rectangle_bottom = parent -> gx_window_client.gx_rectangle_bottom;
92 size.gx_rectangle_right = (GX_VALUE)(parent -> gx_widget_size.gx_rectangle_right - border_width);
93 size.gx_rectangle_left = (GX_VALUE)(size.gx_rectangle_right - scroll -> gx_scrollbar_appearance.gx_scroll_width + 1);
94 }
95 else
96 {
97 size.gx_rectangle_left = parent -> gx_window_client.gx_rectangle_left;
98 size.gx_rectangle_right = parent -> gx_window_client.gx_rectangle_right;
99 size.gx_rectangle_bottom = (GX_VALUE)(parent -> gx_widget_size.gx_rectangle_bottom - border_width);
100 size.gx_rectangle_top = (GX_VALUE)(size.gx_rectangle_bottom - scroll -> gx_scrollbar_appearance.gx_scroll_width + 1);
101 }
102 _gx_widget_resize((GX_WIDGET *)scroll, &size);
103
104 if (style & GX_SCROLLBAR_END_BUTTONS)
105 {
106 if (style & GX_SCROLLBAR_VERTICAL)
107 {
108 /* calculate size for up button */
109 size.gx_rectangle_top = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_top + 1);
110 size.gx_rectangle_right = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_right - 1);
111 size.gx_rectangle_left = (GX_VALUE)(scroll->gx_widget_size.gx_rectangle_left + 1);
112 size.gx_rectangle_bottom = (GX_VALUE)(size.gx_rectangle_top + scroll -> gx_scrollbar_appearance.gx_scroll_width - 1);
113 _gx_widget_resize((GX_WIDGET *)&scroll -> gx_scrollbar_upleft, &size);
114
115 /* calculate size for down button */
116 size.gx_rectangle_bottom = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_bottom - 1);
117 size.gx_rectangle_top = (GX_VALUE)(size.gx_rectangle_bottom - scroll -> gx_scrollbar_appearance.gx_scroll_width + 1);
118 _gx_widget_resize((GX_WIDGET *)&scroll -> gx_scrollbar_downright, &size);
119 }
120 else
121 {
122 /* calculate size for left button */
123 size.gx_rectangle_left = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_left + 1);
124 size.gx_rectangle_bottom = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_bottom - 1);
125 size.gx_rectangle_top = (GX_VALUE)(scroll->gx_widget_size.gx_rectangle_top + 1);
126 size.gx_rectangle_right = (GX_VALUE)(size.gx_rectangle_left + scroll -> gx_scrollbar_appearance.gx_scroll_width - 1);
127 _gx_widget_resize((GX_WIDGET *)&scroll -> gx_scrollbar_upleft, &size);
128
129 /* calculate size for right button */
130 size.gx_rectangle_right = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_right - 1);
131 size.gx_rectangle_left = (GX_VALUE)(size.gx_rectangle_right - scroll -> gx_scrollbar_appearance.gx_scroll_width);
132 _gx_widget_resize((GX_WIDGET *)&scroll -> gx_scrollbar_downright, &size);
133 }
134 }
135 }
136 }
137
138
