ui/motif/range.c

Sat, 11 Nov 2017 11:59:06 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 11 Nov 2017 11:59:06 +0100
changeset 143
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parent 119
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child 157
0b33b9396851
permissions
-rw-r--r--

adds observer support for textarea and textfield (GTK)

119
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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2016 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31
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32 #include "range.h"
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33 #include "container.h"
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34 #include "../../ucx/mempool.h"
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35 #include "../common/context.h"
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36 #include "../common/object.h"
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37
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38
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39 static UIWIDGET ui_scrollbar(UiObject *obj, UiOrientation orientation, UiRange *range, ui_callback f, void *userdata) {
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40 UiContainer *ct = uic_get_current_container(obj);
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41
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42 int n = 0;
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43 Arg args[16];
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44 XtSetArg(args[n], XmNorientation, orientation == UI_HORIZONTAL ? XmHORIZONTAL : XmVERTICAL);
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45 n++;
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46 XtSetArg (args[n], XmNmaximum, 10);
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47 n++;
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48 XtSetArg (args[n], XmNsliderSize, 1);
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49 n++;
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50 Widget parent = ct->prepare(ct, args, &n, FALSE);
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51 Widget scrollbar = XmCreateScrollBar(parent, "scrollbar", args, n);
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52 XtManageChild(scrollbar);
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53 ct->add(ct, scrollbar);
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54
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55 if(range) {
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56 range->get = ui_scrollbar_get;
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57 range->set = ui_scrollbar_set;
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58 range->setrange = ui_scrollbar_setrange;
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59 range->setextent = ui_scrollbar_setextent;
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60 range->obj = scrollbar;
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61 }
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62
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63 if(f) {
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64 UiEventData *event = ucx_mempool_malloc(
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65 obj->ctx->mempool,
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66 sizeof(UiEventData));
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67 event->obj = obj;
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68 event->userdata = userdata;
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69 event->callback = f;
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70 event->value = 0;
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71 XtAddCallback(
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72 scrollbar,
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73 XmNvalueChangedCallback,
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74 (XtCallbackProc)ui_scrollbar_callback,
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75 event);
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76 }
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77
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78 return scrollbar;
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79 }
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80
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81 UIWIDGET ui_hscrollbar(UiObject *obj, UiRange *range, ui_callback f, void *userdata) {
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82 return ui_scrollbar(obj, UI_HORIZONTAL, range, f, userdata);
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83 }
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84
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85 UIWIDGET ui_vscrollbar(UiObject *obj, UiRange *range, ui_callback f, void *userdata) {
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86 return ui_scrollbar(obj, UI_VERTICAL, range, f, userdata);
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87 }
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88
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89 void ui_scrollbar_callback(Widget scrollbar, UiEventData *event, XtPointer cdata) {
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90 UiEvent e;
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91 e.obj = event->obj;
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92 e.window = event->obj->window;
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93 e.document = event->obj->ctx->document;
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94 e.intval = event->value;
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95 event->callback(&e, event->userdata);
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96 }
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97
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98 double ui_scrollbar_get(UiRange *range) {
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99 int intval;
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100 XtVaGetValues(
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101 range->obj,
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102 XmNvalue,
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103 &intval,
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104 NULL);
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105 double value = (double)intval / 10;
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106 range->value = value;
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107 return value;
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108 }
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109
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110 void ui_scrollbar_set(UiRange *range, double value) {
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111 XtVaSetValues(
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112 range->obj,
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113 XmNvalue,
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114 (int)(value * 10),
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115 NULL);
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116 range->value = value;
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117 }
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118
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119 void ui_scrollbar_setrange(UiRange *range, double min, double max) {
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120 XtVaSetValues(
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121 range->obj,
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122 XmNminimum,
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123 (int)(min * 10),
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124 XmNmaximum,
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125 (int)(max * 10),
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126 NULL);
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127 range->min = min;
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128 range->max = max;
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129 }
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130
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131 void ui_scrollbar_setextent(UiRange *range, double extent) {
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132 XtVaSetValues(
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133 range->obj,
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134 XmNsliderSize,
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135 (int)(extent * 10),
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136 NULL);
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137 range->extent = extent;
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138 }

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