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_context.h" 28 #include "gx_system.h" 29 #include "gx_widget.h" 30 #include "gx_single_line_text_input.h" 31 32 33 /**************************************************************************/ 34 /* */ 35 /* FUNCTION RELEASE */ 36 /* */ 37 /* _gx_single_line_text_input_buffer_clear PORTABLE C */ 38 /* 6.1 */ 39 /* AUTHOR */ 40 /* */ 41 /* Kenneth Maxwell, Microsoft Corporation */ 42 /* */ 43 /* DESCRIPTION */ 44 /* */ 45 /* This service deletes all characters from the text input buffer. */ 46 /* */ 47 /* INPUT */ 48 /* */ 49 /* text_input Single-line text input widget */ 50 /* control block */ 51 /* */ 52 /* OUTPUT */ 53 /* */ 54 /* status Completion status */ 55 /* */ 56 /* CALLS */ 57 /* */ 58 /* _gx_widget_border_width_get Get the widget border width */ 59 /* _gx_widget_client_get Get the client rectangle */ 60 /* _gx_system_dirty_mark Mark the widget area as dirty */ 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_buffer_clear(GX_SINGLE_LINE_TEXT_INPUT * text_input)76UINT _gx_single_line_text_input_buffer_clear(GX_SINGLE_LINE_TEXT_INPUT *text_input) 77 { 78 GX_TEXT_INPUT_CURSOR *cursor_ptr; 79 GX_RECTANGLE client; 80 GX_VALUE client_width; 81 GX_VALUE border_width; 82 83 cursor_ptr = &text_input -> gx_single_line_text_input_cursor_instance; 84 85 /* Calculate the widget width for showing text. */ 86 _gx_widget_border_width_get((GX_WIDGET *)text_input, &border_width); 87 _gx_widget_client_get((GX_WIDGET *)text_input, border_width, &client); 88 89 client_width = (GX_VALUE)(client.gx_rectangle_right - client.gx_rectangle_left + 1); 90 91 /* Update the value of cursor position and xoffset. */ 92 switch (text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK) 93 { 94 case GX_STYLE_TEXT_RIGHT: 95 text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(3 - client_width); 96 cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(client.gx_rectangle_right - 1); 97 break; 98 99 case GX_STYLE_TEXT_CENTER: 100 text_input -> gx_single_line_text_input_xoffset = (client_width >> 1); 101 cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(client.gx_rectangle_left + (client_width >> 1) + 1); 102 break; 103 104 case GX_STYLE_TEXT_LEFT: 105 default: 106 text_input -> gx_single_line_text_input_xoffset = 0; 107 cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(client.gx_rectangle_left + 1); 108 break; 109 } 110 111 /* Reset the value of cursor position. */ 112 text_input -> gx_single_line_text_input_buffer[0] = '\0'; 113 text_input -> gx_single_line_text_input_string_size = 0; 114 text_input -> gx_single_line_text_input_insert_pos = 0; 115 116 /* Mark the widget area dirty. */ 117 _gx_system_dirty_mark((GX_WIDGET *)text_input); 118 119 return GX_SUCCESS; 120 } 121 122
