1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** GUIX Component */
17 /** */
18 /** Tree View Management (Menu) */
19 /** */
20 /**************************************************************************/
21
22 #define GX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "gx_api.h"
28 #include "gx_tree_view.h"
29
30 /**************************************************************************/
31 /* */
32 /* FUNCTION RELEASE */
33 /* */
34 /* _gx_tree_view_scroll_info_get PORTABLE C */
35 /* 6.1 */
36 /* AUTHOR */
37 /* */
38 /* Kenneth Maxwell, Microsoft Corporation */
39 /* */
40 /* DESCRIPTION */
41 /* */
42 /* This function gets the tree view scroll information. */
43 /* */
44 /* INPUT */
45 /* */
46 /* tree Pointer to tree view control */
47 /* block */
48 /* type GX_SCROLLBAR_HORIZONTAL */
49 /* or GX_SCROLLBAR_VERTICAL */
50 /* info Pointer to destination for */
51 /* scroll info */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* status Completion status */
56 /* */
57 /* CALLS */
58 /* */
59 /* _gx_tree_view_scroll Scroll tree view client area */
60 /* */
61 /* CALLED BY */
62 /* */
63 /* GUIX Internal Code */
64 /* */
65 /* RELEASE HISTORY */
66 /* */
67 /* DATE NAME DESCRIPTION */
68 /* */
69 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
70 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
71 /* resulting in version 6.1 */
72 /* */
73 /**************************************************************************/
_gx_tree_view_scroll_info_get(GX_TREE_VIEW * tree,ULONG type,GX_SCROLL_INFO * info)74 UINT _gx_tree_view_scroll_info_get(GX_TREE_VIEW *tree, ULONG type, GX_SCROLL_INFO *info)
75 {
76 GX_RECTANGLE *client;
77 INT shift;
78 INT value;
79
80 client = &tree -> gx_window_client;
81
82 if (type & GX_SCROLLBAR_VERTICAL)
83 {
84 info -> gx_scroll_minimum = client -> gx_rectangle_top;
85 info -> gx_scroll_maximum = info -> gx_scroll_minimum + tree -> gx_tree_view_tree_height - 1;
86 info -> gx_scroll_visible = (GX_VALUE)(client -> gx_rectangle_bottom - client -> gx_rectangle_top + 1);
87
88 if (tree -> gx_tree_view_tree_height < info -> gx_scroll_visible)
89 {
90 info -> gx_scroll_maximum = info -> gx_scroll_minimum + info -> gx_scroll_visible - 1;
91 }
92
93 shift = tree -> gx_tree_view_y_shift;
94 value = client -> gx_rectangle_top - shift;
95
96 if (value < info -> gx_scroll_minimum)
97 {
98 value = info -> gx_scroll_minimum;
99 }
100 else if (value > info -> gx_scroll_maximum - info -> gx_scroll_visible + 1)
101 {
102 value = info -> gx_scroll_maximum - info -> gx_scroll_visible + 1;
103 }
104
105 shift = client -> gx_rectangle_top - value;
106
107 if (shift != tree -> gx_tree_view_y_shift)
108 {
109 _gx_tree_view_scroll(tree, 0, (GX_VALUE)(shift - tree->gx_tree_view_y_shift));
110 }
111
112 info -> gx_scroll_value = value;
113 }
114 else
115 {
116 info -> gx_scroll_minimum = client -> gx_rectangle_left;
117 info -> gx_scroll_maximum = info -> gx_scroll_minimum + tree -> gx_tree_view_tree_width - 1;
118 info -> gx_scroll_visible = (GX_VALUE)(client -> gx_rectangle_right - client -> gx_rectangle_left + 1);
119
120 if (tree -> gx_tree_view_tree_width < info -> gx_scroll_visible)
121 {
122 info -> gx_scroll_maximum = info -> gx_scroll_minimum + info -> gx_scroll_visible - 1;
123 }
124
125 shift = tree -> gx_tree_view_x_shift;
126 value = client -> gx_rectangle_left - shift;
127
128 if (value < info -> gx_scroll_minimum)
129 {
130 value = info -> gx_scroll_minimum;
131 }
132 else if (value > info -> gx_scroll_maximum - info -> gx_scroll_visible + 1)
133 {
134 value = info -> gx_scroll_maximum - info -> gx_scroll_visible + 1;
135 }
136
137 shift = client -> gx_rectangle_left - value;
138 if (shift != tree -> gx_tree_view_x_shift)
139 {
140 _gx_tree_view_scroll(tree, (GX_VALUE)(shift - tree->gx_tree_view_x_shift), 0);
141 }
142 info -> gx_scroll_value = value;
143 }
144
145 info -> gx_scroll_increment = (GX_VALUE)(info -> gx_scroll_maximum - info -> gx_scroll_minimum) / 10;
146
147 return(GX_SUCCESS);
148 }
149
150
