soundtab.ui.slidercontroller source code

1 module soundtab.ui.slidercontroller;
2 
3 import dlangui.widgets.widget;
4 import dlangui.widgets.layouts;
5 import dlangui.widgets.controls;
6 import dlangui.widgets.scrollbar;
7 import dlangui.widgets.groupbox;
8 import dlangui.core.signals;
9 import std.conv : to;
10 
11 import soundtab.audio.instruments;
12 
13 interface SliderControllerHandler {
14     void onController(SliderController source, int value);
15 }
16 
17 //version = SLIDER_CONTROLLER_GROUPBOX;
18 version = SLIDER_CONTROLLER_VERTICAL_LAYOUT;
19 version (SLIDER_CONTROLLER_GROUPBOX) {
20     alias SliderControllerBase = GroupBox;
21 } else {
22     alias SliderControllerBase = VerticalLayout;
23 }
24 
25 class SliderController : SliderControllerBase {
26     Signal!SliderControllerHandler onChange;
27     private SliderWidget _slider;
28     private ControllerId _controllerId;
29     version(SLIDER_CONTROLLER_VERTICAL_LAYOUT) {
30         TextWidget _label;
31     }
32 
33     @property ControllerId controllerId() { return _controllerId; }
34 
35     this(ControllerId ID, dstring label, int minValue, int maxValue, int value) {
36         version(SLIDER_CONTROLLER_VERTICAL_LAYOUT) {
37             super(to!string(ID));
38             _label = new TextWidget(null, label);
39             addChild(_label);
40             margins = Rect(5, 0, 5, 0).pointsToPixels;
41             padding = Rect(5, 0, 5, 0).pointsToPixels;
42         } else {
43             super(to!string(ID), label);
44         }
45         minWidth = 100.pointsToPixels;
46         _controllerId = ID;
47         _slider = new SliderWidget(null, Orientation.Horizontal);
48         _slider.setRange(minValue, maxValue);
49         _slider.position = value;
50         _slider.scrollEvent = &onScrollEvent;
51         addChild(_slider);
52     }
53 
54     @property int value() { return _slider.position; }
55     @property SliderController value(int newValue) { _slider.position = newValue; return this; }
56 
57     protected bool onScrollEvent(AbstractSlider source, ScrollEvent event) {
58         if (onChange.assigned)
59             onChange(this, event.position);
60         return true;
61     }
62 }