1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2016 Olaf Wintermann. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <stdio.h>
30 #include <stdlib.h>
31
32 #include "range.h"
33 #include "container.h"
34 #include <ucx/mempool.h>
35 #include "../common/context.h"
36 #include "../common/object.h"
37
38
39 static UIWIDGET ui_scrollbar(UiObject *obj, UiOrientation orientation, UiRange *range, ui_callback f, void *userdata) {
40 UiContainer *ct = uic_get_current_container(obj);
41
42 int n = 0;
43 Arg args[16];
44 XtSetArg(args[n], XmNorientation, orientation == UI_HORIZONTAL ? XmHORIZONTAL : XmVERTICAL);
45 n++;
46 XtSetArg (args[n], XmNmaximum, 10);
47 n++;
48 XtSetArg (args[n], XmNsliderSize, 1);
49 n++;
50 Widget parent = ct->prepare(ct, args, &n, FALSE);
51 Widget scrollbar = XmCreateScrollBar(parent, "scrollbar", args, n);
52 XtManageChild(scrollbar);
53 ct->add(ct, scrollbar);
54
55 if(range) {
56 range->get = ui_scrollbar_get;
57 range->set = ui_scrollbar_set;
58 range->setrange = ui_scrollbar_setrange;
59 range->setextent = ui_scrollbar_setextent;
60 range->obj = scrollbar;
61 }
62
63 if(f) {
64 UiEventData *event = ucx_mempool_malloc(
65 obj->ctx->mempool,
66 sizeof(UiEventData));
67 event->obj = obj;
68 event->userdata = userdata;
69 event->callback = f;
70 event->value = 0;
71 XtAddCallback(
72 scrollbar,
73 XmNvalueChangedCallback,
74 (XtCallbackProc)ui_scrollbar_callback,
75 event);
76 }
77
78 return scrollbar;
79 }
80
81 UIWIDGET ui_hscrollbar(UiObject *obj, UiRange *range, ui_callback f, void *userdata) {
82 return ui_scrollbar(obj, UI_HORIZONTAL, range, f, userdata);
83 }
84
85 UIWIDGET ui_vscrollbar(UiObject *obj, UiRange *range, ui_callback f, void *userdata) {
86 return ui_scrollbar(obj, UI_VERTICAL, range, f, userdata);
87 }
88
89 void ui_scrollbar_callback(Widget scrollbar, UiEventData *event, XtPointer cdata) {
90 UiEvent e;
91 e.obj = event->obj;
92 e.window = event->obj->window;
93 e.document = event->obj->ctx->document;
94 e.intval = event->value;
95 event->callback(&e, event->userdata);
96 }
97
98 double ui_scrollbar_get(UiRange *range) {
99 int intval;
100 XtVaGetValues(
101 range->obj,
102 XmNvalue,
103 &intval,
104 NULL);
105 double value = (double)intval / 10;
106 range->value = value;
107 return value;
108 }
109
110 void ui_scrollbar_set(UiRange *range, double value) {
111 XtVaSetValues(
112 range->obj,
113 XmNvalue,
114 (int)(value * 10),
115 NULL);
116 range->value = value;
117 }
118
119 void ui_scrollbar_setrange(UiRange *range, double min, double max) {
120 XtVaSetValues(
121 range->obj,
122 XmNminimum,
123 (int)(min * 10),
124 XmNmaximum,
125 (int)(max * 10),
126 NULL);
127 range->min = min;
128 range->max = max;
129 }
130
131 void ui_scrollbar_setextent(UiRange *range, double extent) {
132 XtVaSetValues(
133 range->obj,
134 XmNsliderSize,
135 (int)(extent * 10),
136 NULL);
137 range->extent = extent;
138 }
139