From 94d00c93b021aa611f32e10553a078c33360f67e Mon Sep 17 00:00:00 2001
From: Hans Baier <hansfbaier@googlemail.com>
Date: Sat, 28 Mar 2009 08:29:01 +0700
Subject: [PATCH] KnobWithDisplay: added

---
 prolooks/KnobWithDisplay      | 82 +++++++++++++++++++++++++++++++++++++++++++
 prolooks/KnobWithDisplay.vala | 37 +++++++++++++++++++
 2 files changed, 119 insertions(+)
 create mode 100644 prolooks/KnobWithDisplay
 create mode 100644 prolooks/KnobWithDisplay.vala

diff --git a/prolooks/KnobWithDisplay b/prolooks/KnobWithDisplay
new file mode 100644
index 0000000..63c06ed
--- /dev/null
+++ b/prolooks/KnobWithDisplay
@@ -0,0 +1,82 @@
+/* 
+    Copyright 2009 by Hans Baier
+    License: LGPLv2+ 
+*/
+
+using Gtk;
+
+namespace Prolooks {
+
+public class ValueDisplay : DrawingArea {
+
+    private string _text = "";
+    public string text {
+        set {
+            if (_text != value) {
+                _text = value;
+                queue_draw ();
+            }
+        }
+        get {
+            return _text;
+        }
+    }
+    
+    public bool show_matrix {get; set;}
+    
+    private int width  = 36;
+    private int height = 16;
+    
+    construct {
+        set_size_request (width, height);
+        show_matrix = true;
+    }
+
+    /* Widget is asked to draw itself */
+    public override bool expose_event (Gdk.EventExpose event) {
+        //Gdk.Color test_color = color_from_string ("#ff0000");
+
+        width  = allocation.width;
+        height = allocation.height;
+        
+        // Create a Cairo context
+        var cr = Gdk.cairo_create (this.window);
+
+        // Set clipping area in order to avoid unnecessary drawing
+        cr.rectangle (event.area.x, event.area.y,
+                      event.area.width, event.area.height);
+        cr.clip ();
+        
+        DisplayBase.outer_rim_for_display (cr, 0, 0, width, height, style.bg[Gtk.StateType.SELECTED]);
+        
+        cr.translate (3, 3);
+        
+        var inner_width  = width  - 6;
+        var inner_height = height - 6;
+        
+        if (show_matrix) {
+            DisplayBase.dot_matrix (cr, 0.5, 0.5, inner_width, inner_height, DisplayBase.matrix_dot_color ());
+        }
+        
+        DisplayBase.lcd(cr, inner_width, inner_height, 3.0);
+        
+        // draw text
+        double font_size         = inner_height;
+        
+        cr.select_font_face ("FreeSans", Cairo.FontSlant.NORMAL, Cairo.FontWeight.NORMAL);
+        cr.set_font_size (font_size);
+        Cairo.TextExtents ext = Cairo.TextExtents();
+        cr.text_extents (text, ref ext);
+        double x = (inner_width - ext.x_advance) / 2.0;
+        double y = inner_height * 0.85;
+        
+        DisplayBase.text (cr, text, x, y, font_size);
+        
+        DisplayBase.reflection(cr, inner_width, inner_height);
+        
+        return false;
+    }
+}
+
+} // namespace Prolooks
+
diff --git a/prolooks/KnobWithDisplay.vala b/prolooks/KnobWithDisplay.vala
new file mode 100644
index 0000000..4d98550
--- /dev/null
+++ b/prolooks/KnobWithDisplay.vala
@@ -0,0 +1,37 @@
+/* 
+    Copyright 2009 by Hans Baier
+    License: LGPLv2+ 
+*/
+
+using Gtk;
+
+namespace Prolooks {
+
+public class KnobWithDisplay : EventBox {
+    private VBox vbox;
+    private Knob knob;
+    private ValueDisplay display;
+
+    // delegating properties
+    public bool show_matrix       { get { return display.show_matrix;    } set { display.show_matrix = value; } }
+    public Adjustment adjustment  { get { return knob.get_adjustment (); } set { knob.set_adjustment (value); } }
+    public KnobMode knob_mode     { get { return knob.knob_mode;         } set { knob.knob_mode = value;      } }
+    
+    construct {
+        vbox = new VBox (false, 0);
+        knob = new Knob ();
+        vbox.add (knob);
+        display = new ValueDisplay ();
+        vbox.add (display);
+        knob.user_data = display;
+        knob.value_changed += (knob) => {
+            ValueDisplay disp = knob.user_data as ValueDisplay;
+            disp.text = knob.get_value ().to_string ();
+        };
+        add (vbox);
+        show_matrix = true;
+    }
+}
+
+} // namespace Prolooks
+
-- 
2.11.4.GIT