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 /**   Line Chart Management (Line Chart)                                  */
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_line_chart.h"
29 
30 
31 /**************************************************************************/
32 /*                                                                        */
33 /*  FUNCTION                                               RELEASE        */
34 /*                                                                        */
35 /*    _gx_line_chart_y_scale_calculate                    PORTABLE C      */
36 /*                                                           6.1          */
37 /*  AUTHOR                                                                */
38 /*                                                                        */
39 /*    Kenneth Maxwell, Microsoft Corporation                              */
40 /*                                                                        */
41 /*  DESCRIPTION                                                           */
42 /*                                                                        */
43 /*    This function calculates chart y axis scale value                   */
44 /*                                                                        */
45 /*  INPUT                                                                 */
46 /*                                                                        */
47 /*    chart                                 Line chart                    */
48 /*    return_value                          location to pass return value */
49 /*                                                                        */
50 /*  OUTPUT                                                                */
51 /*                                                                        */
52 /*    Completion Status                                                   */
53 /*                                                                        */
54 /*  CALLS                                                                 */
55 /*                                                                        */
56 /*    none                                                                */
57 /*                                                                        */
58 /*  CALLED BY                                                             */
59 /*                                                                        */
60 /*    Application Code                                                    */
61 /*                                                                        */
62 /*  RELEASE HISTORY                                                       */
63 /*                                                                        */
64 /*    DATE              NAME                      DESCRIPTION             */
65 /*                                                                        */
66 /*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
67 /*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
68 /*                                            resulting in version 6.1    */
69 /*                                                                        */
70 /**************************************************************************/
_gx_line_chart_y_scale_calculate(GX_LINE_CHART * chart,INT * return_value)71 UINT _gx_line_chart_y_scale_calculate(GX_LINE_CHART *chart, INT *return_value)
72 {
73 INT y_scale;
74 GX_LINE_CHART_INFO *chart_info;
75 
76     chart_info = &chart -> gx_line_chart_info;
77 
78     y_scale = chart -> gx_widget_size.gx_rectangle_bottom - chart -> gx_widget_size.gx_rectangle_top + 1;
79     y_scale -= chart_info -> gx_line_chart_top_margin + chart_info -> gx_line_chart_bottom_margin;
80     y_scale -= chart_info -> gx_line_chart_axis_line_width;
81 
82     y_scale = GX_FIXED_VAL_MAKE(y_scale);
83 
84     if (chart_info -> gx_line_chart_max_val != chart_info -> gx_line_chart_min_val)
85     {
86         y_scale /= (chart_info -> gx_line_chart_max_val - chart_info -> gx_line_chart_min_val);
87     }
88     *return_value = y_scale;
89     return GX_SUCCESS;
90 }
91 
92 
93 
94 
95 
96