Class: TrackGraphicsPathItem

Inherits:
Qt::GraphicsPathItem
  • Object
show all
Defined in:
lib/main-dlg-impl.rb

Constant Summary collapse

@@nodeinfo_array = 
Array.new

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent) ⇒ TrackGraphicsPathItem

Returns a new instance of TrackGraphicsPathItem.



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# File 'lib/main-dlg-impl.rb', line 1045

def initialize(parent)
  super()
  @parent=parent
  @addToScene = true

  # needs to be embedded in other graphics element to circumvent a bug if the position of
  # the ProxyWidget is above, below 2**15 - 1, bug in QT
  @nodeinfo = Qt::GraphicsRectItem.new(0,0,100,100)
  @nodeinfo.setPen(Qt::Pen.new(Qt::NoPen))

  @nodeinfow = Qt::GraphicsProxyWidget.new(@nodeinfo)
  @nodeinfo_widget = NodeinfoWidget.new(@nodeinfo)
  @nodeinfo_widget.setAttribute(Qt::WA_Hover)
  @nodeinfow.setWidget(@nodeinfo_widget)
  @nodeinfo.setZValue(Z_VALUE_HUD)
  @nodeinfo.setAcceptHoverEvents(true)
  @nodeinfo.setVisible(false)
  setAcceptHoverEvents(true)
  setHandlesChildEvents(true)

  # store these elements in permanent array
  # otherwise GC will remove them and then causes core-dumps in QT
  @@nodeinfo_array << [@nodeinfow, @nodeinfo_widget]
end

Instance Attribute Details

#nodeinfo ⇒ Object (readonly)

Returns the value of attribute nodeinfo.



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# File 'lib/main-dlg-impl.rb', line 1041

def nodeinfo
  @nodeinfo
end

#nodeinfo_widget ⇒ Object (readonly)

Returns the value of attribute nodeinfo_widget.



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# File 'lib/main-dlg-impl.rb', line 1041

def nodeinfo_widget
  @nodeinfo_widget
end

Instance Method Details

#colorize(data, dlg) ⇒ Object 



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# File 'lib/main-dlg-impl.rb', line 1070

def colorize(data, dlg)
  scene=dlg.scene
  prev_x = path.elementAt(0).x
  prev_y = path.elementAt(0).y
  group = Qt::GraphicsItemGroup.new
  x = y = 0
  pen=Qt::Pen.new
  pen.setWidth(5)
  line=nil
  d=data.dup
  d.delete_if{|e| e<=0.0 }
  if d.length==0 then
    Qt::MessageBox::warning(nil, "Warning", "No elevation/speed data found in track.")
    return
  end
  max=d.max
  min=d.min
  delta=max-min
  color=nil
  1.upto(path.elementCount-2){|i|
    color=Qt::Color.new
    if data[i]>0.0 then
      color.setHsv((data[i]-min)/delta * COLORRANGE_DEG + COLOROFFSET_DEG,255,255)
    else
      color.setRgb(100,100,100)
    end
    pen.setColor(color)
    x = path.elementAt(i).x
    y = path.elementAt(i).y
    line = Qt::GraphicsLineItem.new(prev_x, prev_y, x, y)
    line.setPen(pen)
    line.setZValue(Z_VALUE_TRACK_COLORED)
    group.addToGroup(line)
    prev_x = x
    prev_y = y
  }
    group.setZValue(Z_VALUE_TRACK_COLORED)
    scene.addItem(group)
  
end

#contextMenuEvent(contextEvent) ⇒ Object 



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# File 'lib/main-dlg-impl.rb', line 1111

def contextMenuEvent(contextEvent)
  dlg=contextEvent.widget.parent.parent
  entries=["Colorize Altitude", "Colorize Speed"]
  menu=Qt::Menu.new
  entries.each{|e|
    if e=="-" then
      menu.addSeparator
    else
      menu.addAction(e)
    end
  }
  sel=menu.exec(contextEvent.screenPos)
  sel=sel.text if !sel.nil?
  data=[]
  case sel
    when entries[0]
      @parent.nodes.each{|n|
        data << n.elevation
      }
      colorize(data, dlg)
      
    when entries[1]
      @parent.nodes.each{|n|
        data << n.speed
      }
      colorize(data, dlg)
      
  end # case
end

#hoverLeaveEvent(hoverEvent) ⇒ Object 



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# File 'lib/main-dlg-impl.rb', line 1193

def hoverLeaveEvent(hoverEvent)
#   ap "hoverleave in"
  if @nodeinfo_widget.hover_on then
    @nodeinfo_widget.hovertimer.start(HOVER_TIMER)
  end
#   ap "hoverleave out"
end

#hoverMoveEvent(hoverEvent) ⇒ Object 



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# File 'lib/main-dlg-impl.rb', line 1141

def hoverMoveEvent(hoverEvent)
#   ap "hovermove in"
  dlg=hoverEvent.widget.parent.parent

  if @addToScene then
    dlg.scene.addItem(@nodeinfo)
    @addToScene = false
  end
  
  if !@nodeinfo_widget.hover_on then
    @nodeinfo.setVisible(true)
    @nodeinfo_widget.hover_on = true
  end
  x=hoverEvent.pos.x
  y=hoverEvent.pos.y
  e=nil
  hit=nil
  1.upto(self.path.elementCount-1){|i|
    e=self.path.elementAt(i)
    if ((e.x - x).abs < 3) and ((e.y - y).abs < 3)then
      hit=i
      break
    end
  }
  
  if !hit.nil? and !@parent.nil? then
    n=@parent.nodes[hit]
    @nodeinfo_widget.w.lBlon.text="%.3f°" % n.lon
    @nodeinfo_widget.w.lBlat.text="%.3f°" % n.lat
    @nodeinfo_widget.w.lBalt.text="%.1fm" % n.elevation
    @nodeinfo_widget.w.lBspeed.text="%.1fkm/h" % n.speed
    @nodeinfo_widget.w.lBdist.text="%.2fkm" % (@parent.distance(n) / 1000)
    @nodeinfo_widget.w.lBtime.text=@parent.duration_str
    pos = mapToScene(hoverEvent.pos)
    if !@nodeinfo.isVisible or @nodeinfo_widget.hover_widget_pos.nil? or (!@nodeinfo_widget.hover_widget_pos.nil? \
          and Qt::LineF.new(@nodeinfo_widget.hover_widget_pos, pos).length > 30) then
      dlg.scene.items.each {|item|
        if item.kind_of? Qt::GraphicsRectItem then
          if item != @nodeinfo then
        #   item.setVisible(false)
          end
        end
      }
      @nodeinfo.setVisible(true)
      @nodeinfo_widget.hover_widget_pos=pos
      @nodeinfo.setPos(pos)
      @nodeinfo_widget.hovertimer.stop
    end
  end
#   ap "hovermove out"
end