1 files changed, 161 insertions, 0 deletions
diff --git a/qtruby/rubylib/examples/qt-examples/chart/element.rb b/qtruby/rubylib/examples/qt-examples/chart/element.rb
new file mode 100644
index 00000000..ba135632
--- /dev/null
+++ b/qtruby/rubylib/examples/qt-examples/chart/element.rb
@@ -0,0 +1,161 @@
+class Element
+
+    FIELD_SEP = ':'
+    PROPOINT_SEP = ';'
+    XY_SEP = ','
+    
+    EPSILON = 0.0000001
+    
+    INVALID = -1
+    NO_PROPORTION = -1
+    MAX_PROPOINTS = 3  # One proportional point per chart type
+    
+    attr_accessor :value, :valueColor, :valuePattern, :label, :labelColor
+
+    def initialize( value = INVALID, valueColor = Qt::gray,
+            valuePattern = Qt::SolidPattern,
+            label = nil,
+            labelColor = Qt::black )
+        init( value, valueColor, valuePattern, label, labelColor )
+        @propoints = []
+        for i in 0...MAX_PROPOINTS * 2
+            @propoints[i] = NO_PROPORTION
+        end
+    end
+    
+    def isValid() return @value > EPSILON end
+    
+        
+    def init( value, valueColor, valuePattern,
+                        label, labelColor )
+        @value = value
+        @valueColor = valueColor
+        if  Qt::SolidPattern >= valuePattern || Qt::DiagCrossPattern <= valuePattern
+            valuePattern = Qt::SolidPattern
+        end
+        @valuePattern = valuePattern
+        @label = label
+        @labelColor = labelColor
+    end
+    
+    def set( value = INVALID, valueColor = Qt::gray,
+            valuePattern = Qt::SolidPattern,
+            label = nil,
+            labelColor = Qt::black )
+        init( value, valueColor, valuePattern, label, labelColor )
+    end
+    
+    def setValuePattern( valuePattern )
+        if  valuePattern < Qt::SolidPattern.to_i || valuePattern > Qt::DiagCrossPattern.to_i
+            valuePattern = Qt::SolidPattern
+        end
+        @valuePattern = valuePattern
+    end
+    
+    
+    def proX( index )
+        return @propoints[2 * index]
+    end
+    
+    
+    def proY( index )
+        return @propoints[(2 * index) + 1]
+    end
+    
+    
+    def setProX( index, value )
+        @propoints[2 * index] = value
+    end
+    
+    
+    def setProY( index, value )
+        @propoints[(2 * index) + 1] = value
+    end
+    
+end
+
+class Qt::TextStream
+
+    alias op_write <<
+	
+    def <<( item )
+		if !item.kind_of? Element
+			return op_write(item)
+		end
+		element = item
+        self << element.value() << Element::FIELD_SEP <<
+        element.valueColor().name() << Element::FIELD_SEP << 
+        element.valuePattern().to_i << Element::FIELD_SEP <<
+        element.labelColor().name() << Element::FIELD_SEP
+    
+        for i in 0...Element::MAX_PROPOINTS
+            self << element.proX( i ) << Element::XY_SEP << element.proY( i )
+            self << ( i == Element::MAX_PROPOINTS - 1 ? Element::FIELD_SEP : Element::PROPOINT_SEP )
+        end
+    
+        self << element.label() << "\n"
+    
+        return self
+    end
+    
+    alias op_read >>
+    
+	def >>( item )
+		if !item.kind_of? Element
+			return op_read(item)
+		end
+		
+		element = item
+        data = readLine()
+        element.value = Element::INVALID
+    
+        errors = 0
+    
+        fields = data.split( Element::FIELD_SEP )
+        if  fields.length() >= 4 
+            value = fields[0].to_f
+            if  value.nil?
+                errors += 1
+            end
+            valueColor = Qt::Color.new( fields[1] )
+            if  !valueColor.isValid()
+                errors += 1
+            end
+            valuePattern = fields[2].to_i
+            if  valuePattern.nil?
+                errors += 1
+            end
+            labelColor = Qt::Color.new( fields[3] )
+            if  !labelColor.isValid()
+                errors += 1
+            end
+            propoints = fields[4].split( Element::PROPOINT_SEP )
+            label = data.split(Element::FIELD_SEP)[5]
+            if errors == 0
+                element.set( value, valueColor, valuePattern, label, labelColor )
+                i = 0
+                propoints.each do |point|
+                errors = 0
+                    xy = point.split( Element::XY_SEP )
+                    x = xy[0].to_f
+                    if  x.nil? || x <= 0.0 || x >= 1.0
+                        errors += 1
+                    end
+                    y = xy[1].to_f
+                    if  y.nil? || y <= 0.0 || y >= 1.0
+                        errors += 1
+                    end
+                    if  errors > 0
+                        x = y = Element::NO_PROPORTION
+                    end
+                    element.setProX( i, x )
+                    element.setProY( i, y )
+                    i += 1
+                end
+            end
+        end
+    
+        return self
+    end
+
+end