ui/gtk/range.c

Fri, 09 Feb 2024 16:50:23 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Fri, 09 Feb 2024 16:50:23 +0100
changeset 26
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parent 0
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child 32
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implement resource deletion

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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 2017 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 "../common/context.h"
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35 #include "../common/object.h"
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36
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37
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38 static UIWIDGET ui_scrollbar(UiObject *obj, UiOrientation orientation, UiRange *range, ui_callback f, void *userdata) {
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39 #ifdef UI_GTK3
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40 GtkWidget *scrollbar = gtk_scrollbar_new(orientation == UI_HORIZONTAL ? GTK_ORIENTATION_HORIZONTAL : GTK_ORIENTATION_VERTICAL, NULL);
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41 #else
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42 GtkWidget *scrollbar;
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43 if(orientation == UI_HORIZONTAL) {
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44 scrollbar = gtk_hscrollbar_new(NULL);
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45 } else {
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46 scrollbar = gtk_hscrollbar_new(NULL);
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47 }
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48 #endif
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49
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50 if(range) {
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51 range->get = ui_scrollbar_get;
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52 range->set = ui_scrollbar_set;
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53 range->setrange = ui_scrollbar_setrange;
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54 range->setextent = ui_scrollbar_setextent;
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55 range->obj = scrollbar;
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56 }
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57
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58 if(f) {
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59 UiEventData *event = malloc(sizeof(UiEventData));
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60 event->obj = obj;
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61 event->userdata = userdata;
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62 event->callback = f;
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63 event->value = 0;
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64
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65 g_signal_connect(
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66 G_OBJECT(scrollbar),
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67 "value-changed",
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68 G_CALLBACK(ui_scrollbar_value_changed),
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69 event);
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70 g_signal_connect(
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71 scrollbar,
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72 "destroy",
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73 G_CALLBACK(ui_destroy_userdata),
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74 event);
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75 }
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76
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77 UiContainer *ct = uic_get_current_container(obj);
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78 ct->add(ct, scrollbar, FALSE);
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79
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80 return scrollbar;
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81 }
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82
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83 UIWIDGET ui_hscrollbar(UiObject *obj, UiRange *range, ui_callback f, void *userdata) {
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84 return ui_scrollbar(obj, UI_HORIZONTAL, range, f, userdata);
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85 }
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86
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87 UIWIDGET ui_vscrollbar(UiObject *obj, UiRange *range, ui_callback f, void *userdata) {
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88 return ui_scrollbar(obj, UI_VERTICAL, range, f, userdata);
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89 }
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90
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91 gboolean ui_scrollbar_value_changed(GtkRange *range, UiEventData *event) {
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92 UiEvent e;
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93 e.obj = event->obj;
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94 e.window = event->obj->window;
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95 e.document = event->obj->ctx->document;
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96 e.eventdata = NULL;
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97 e.intval = event->value;
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98 event->callback(&e, event->userdata);
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99 return TRUE;
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100 }
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101
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102 double ui_scrollbar_get(UiRange *range) {
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103 double value = gtk_range_get_value(GTK_RANGE(range->obj));
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104 range->value = value;
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105 return value;
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106 }
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107
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108 void ui_scrollbar_set(UiRange *range, double value) {
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109 gtk_range_set_value(GTK_RANGE(range->obj), value);
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110 range->value = value;
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111 }
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112
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113 void ui_scrollbar_setrange(UiRange *range, double min, double max) {
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114 gtk_range_set_range(GTK_RANGE(range->obj), min, max);
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115 range->min = min;
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116 range->max = max;
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117 }
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118
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119 void ui_scrollbar_setextent(UiRange *range, double extent) {
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120 GtkAdjustment *a = gtk_range_get_adjustment(GTK_RANGE(range->obj));
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121 #ifdef UI_GTK2LEGACY
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122 a->page_size = extent;
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123 #else
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124 gtk_adjustment_set_page_size(a, extent);
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125 #endif
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126 #if !(GTK_MAJOR_VERSION >= 3 && GTK_MINOR_VERSION >= 18)
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127 gtk_adjustment_changed(a);
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128 #endif
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129 range->extent = extent;
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130 }

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