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 /** Text Input Management (Single Line Text Input) */ 18 /** */ 19 /**************************************************************************/ 20 21 #define GX_SOURCE_CODE 22 23 24 /* Include necessary system files. */ 25 26 #include "gx_api.h" 27 #include "gx_system.h" 28 #include "gx_widget.h" 29 #include "gx_single_line_text_input.h" 30 31 /**************************************************************************/ 32 /* */ 33 /* FUNCTION RELEASE */ 34 /* */ 35 /* _gx_single_line_text_input_position_update PORTABLE C */ 36 /* 6.1 */ 37 /* AUTHOR */ 38 /* */ 39 /* Kenneth Maxwell, Microsoft Corporation */ 40 /* */ 41 /* DESCRIPTION */ 42 /* */ 43 /* This function update the cursor position according to character */ 44 /* insert index. */ 45 /* */ 46 /* INPUT */ 47 /* */ 48 /* text_input Single-line text input widget */ 49 /* control block */ 50 /* */ 51 /* OUTPUT */ 52 /* */ 53 /* Complete status */ 54 /* */ 55 /* CALLS */ 56 /* */ 57 /* _gx_widget_font_get Get font by specified ID */ 58 /* _gx_widget_border_width_get Get widget border width */ 59 /* _gx_widget_client_get Get widget client rectangle */ 60 /* _gx_system_string_width_get Get the width of a string */ 61 /* */ 62 /* CALLED BY */ 63 /* */ 64 /* Application Code */ 65 /* GUIX Internal Code */ 66 /* */ 67 /* RELEASE HISTORY */ 68 /* */ 69 /* DATE NAME DESCRIPTION */ 70 /* */ 71 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ 72 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ 73 /* resulting in version 6.1 */ 74 /* */ 75 /**************************************************************************/ _gx_single_line_text_input_position_update(GX_SINGLE_LINE_TEXT_INPUT * text_input)76UINT _gx_single_line_text_input_position_update(GX_SINGLE_LINE_TEXT_INPUT *text_input) 77 { 78 GX_TEXT_INPUT_CURSOR *cursor_ptr; 79 UINT insert_pos; 80 GX_FONT *gx_font; 81 GX_RECTANGLE client; 82 GX_VALUE width; 83 GX_VALUE x_pos; 84 GX_STRING string; 85 86 cursor_ptr = &text_input -> gx_single_line_text_input_cursor_instance; 87 insert_pos = text_input -> gx_single_line_text_input_insert_pos; 88 89 _gx_widget_font_get((GX_WIDGET *)text_input, text_input -> gx_prompt_font_id, &gx_font); 90 _gx_widget_border_width_get((GX_WIDGET *)text_input, &width); 91 _gx_widget_client_get((GX_WIDGET *)text_input, width, &client); 92 93 /* Calculate distance from first character to character insert position. */ 94 string.gx_string_ptr = text_input -> gx_single_line_text_input_buffer; 95 string.gx_string_length = insert_pos; 96 _gx_system_string_width_get_ext(gx_font, &string, &width); 97 98 switch (text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK) 99 { 100 case GX_STYLE_TEXT_RIGHT: 101 x_pos = (GX_VALUE)(client.gx_rectangle_right - 1); 102 break; 103 104 case GX_STYLE_TEXT_CENTER: 105 x_pos = client.gx_rectangle_left; 106 x_pos = (GX_VALUE)(x_pos + 1 + ((client.gx_rectangle_right - client.gx_rectangle_left + 1) >> 1)); 107 break; 108 109 case GX_STYLE_TEXT_LEFT: 110 default: 111 x_pos = (GX_VALUE)(client.gx_rectangle_left + 1); 112 break; 113 } 114 115 /* Pick up draw start position. */ 116 x_pos = (GX_VALUE)(x_pos - text_input -> gx_single_line_text_input_xoffset); 117 118 /* Update cursor position. */ 119 cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(x_pos + width); 120 121 return GX_SUCCESS; 122 } 123 124
