Run Processing programs on your touchscreen RPi2

01 /*
02  To try out different configurations try the example
03  G4P_CustomSlider_Config.
04  - for Processing V2 and V3
05  (c) 2015 Peter Lager
06
07  */
08 import g4p_controls.*;
09
10 GImageToggleButton btnToggle0;
11 GCustomSlider sdr1;
12 GLabel label1;
13
14 void setup() {
15   size(300, 200);
16
17   // Simple switch
18   btnToggle0 = new GImageToggleButton(this, 10, 10);
19   // Create description labels
20   createLabels();
21
22   //=============================================================
23   // Simple default slider,
24   // constructor is `Parent applet', the x, y position and length
25   sdr1 = new GCustomSlider(this, 20, 80, 260, 50, null);
26   sdr1.setShowDecor(false, true, true, true);
27   sdr1.setNbrTicks(5);
28   sdr1.setLimits(40, -100, 100);
29   }
30
31   // Event handler for image toggle buttons
32   int abc = 50;
33   public void handleToggleButtonEvents(GImageToggleButton button, GEvent event) {
34   println(button + "   State: " + button.getState());
35   int redstate = button.getState();
36   // console text to see that the switch works
37   if (redstate == 0) {
38     abc = 100;
39     }
40   else {
41     abc = 200;
42     }
43   println("color = " + abc);
44     // visual sign switch is working, comment for no text zombies
45     background(abc, 200, 255);
46   }
47
48   // Event handler for the slider
49   public void handleSliderEvents(GValueControl slider, GEvent event) {
50   // console text to display changing values of slider
51     println(sdr1.getValueS() + "    " + event);
52   }
53
54   // Create the labels saying what-is-what
55   public void createLabels() {
56     label1 = new GLabel(this, 60, 10, 110, 50);
57     label1.setText("Library default 2 state button");
58     label1.setTextBold();
59     label1.setOpaque(true);
60   }
61
62   void draw() {
63   // uncomment so slider numbers don't become onscreen zombies when flipping switch
64   // background(200, 200, 255);
65   }