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 /**   Scroll Wheel Management (Scroll Wheel)                              */
19 /**                                                                       */
20 /**************************************************************************/
21 
22 #define GX_SOURCE_CODE
23 
24 
25 /* Include necessary system files.  */
26 
27 #include "gx_api.h"
28 #include "gx_scroll_wheel.h"
29 #include "gx_system.h"
30 #include "gx_utility.h"
31 
32 /**************************************************************************/
33 /*                                                                        */
34 /*  FUNCTION                                               RELEASE        */
35 /*                                                                        */
36 /*    _gx_scroll_wheel_gradient_alpha_set                 PORTABLE C      */
37 /*                                                           6.1          */
38 /*  AUTHOR                                                                */
39 /*                                                                        */
40 /*    Kenneth Maxwell, Microsoft Corporation                              */
41 /*                                                                        */
42 /*  DESCRIPTION                                                           */
43 /*                                                                        */
44 /*    This function sets the start and end alpha of gradient pixelmap that*/
45 /*    used to cover the top and bottom of a text scroll wheel widget.     */
46 /*                                                                        */
47 /*  INPUT                                                                 */
48 /*                                                                        */
49 /*    wheel                                 Scroll wheel control block    */
50 /*    start_alpha                           Start alpha                   */
51 /*    end_alpha                             End alpha                     */
52 /*                                                                        */
53 /*  OUTPUT                                                                */
54 /*                                                                        */
55 /*    status                                Completion status             */
56 /*                                                                        */
57 /*  CALLS                                                                 */
58 /*                                                                        */
59 /*    _gx_scroll_wheel_gradient_create      Create a gradient pixelmap    */
60 /*    _gx_system_dirty_mark                 Mark a widget as dirty        */
61 /*                                                                        */
62 /*  CALLED BY                                                             */
63 /*                                                                        */
64 /*    Application 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_scroll_wheel_gradient_alpha_set(GX_SCROLL_WHEEL * wheel,GX_UBYTE start_alpha,GX_UBYTE end_alpha)75 UINT _gx_scroll_wheel_gradient_alpha_set(GX_SCROLL_WHEEL *wheel, GX_UBYTE start_alpha, GX_UBYTE end_alpha)
76 {
77     wheel -> gx_scroll_wheel_gradient.gx_gradient_alpha_start = start_alpha;
78     wheel -> gx_scroll_wheel_gradient.gx_gradient_alpha_end = end_alpha;
79 
80     if (wheel -> gx_widget_status & GX_STATUS_VISIBLE)
81     {
82         _gx_scroll_wheel_gradient_create(wheel);
83         _gx_system_dirty_mark((GX_WIDGET *)wheel);
84     }
85 
86     return GX_SUCCESS;
87 }
88 
89