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sample_code:draw_smiley

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sample_code:draw_smiley [2015/09/16 07:18] (current)
stevegarman created
Line 1: Line 1:
 +====== Draw a Smiley ======
 +This demo was written by Sankarshan Dudhate.
  
 +<code JavaScript smiley.js>​
 +//​Called when application is started.
 +function OnStart()
 +{
 +    //​Create a layout with objects vertically centered.
 +    lay = app.CreateLayout( "​linear",​ "​VCenter,​FillXY"​ );​    
 +    //​Get size for a square imsge
 +    var siz=square(1);​
 +    //​Create an empty image to act as our drawing canvas of full width and height.
 +    img = app.CreateImage(null,​siz.w,​siz.h);​
 +    //​img=app.CreateImage(null,​1,​1);​
 +    lay.AddChild(img);​ //​Add it to layout.
 +
 +    img.SetColor("#​ffffffff"​);​ //​Set colour of our canvas to white.
 +    img.SetPaintColor("#​ff000000"​);​ //​Set colour objects darwn on canvas to '​Black'​.
 +                                    
 +    img.SetPaintStyle("​Line"​);​ //​Set style of objects drawn on canvas to '​Line.'​
 +    img.SetLineWidth(3);​ //​Set LineWidth of obiects drawn to 3 pixels. 
 +    img.DrawCircle(0.5,​0.2,​0.18);​ //​Draw a circle with center at (0.5,​0.2) and radius 0.18 of device'​s width. 
 +
 +    img.SetPaintStyle("​Fill"​);​ //​Set style of objects drawn to '​Fill'​.
 +
 +    img.SetPaintColor("#​ff444444"​);​ //​Set colour of objects drawn to '​Gray'​.
 +    img.DrawCircle(0.42,​0.16,​0.04);​ //​Draw circle with center at (0.42,​0.16) and radius 0.04
 +    img.DrawCircle(0.57,​0.16,​0.04);​ //​Center at (0.57,​0.16) and radius 0.04.
 +
 +    img.SetPaintColor("#​ff0000"​);​ //​Set colour of objects drawn to '​Red'​.
 +
 +    //​Draw an arc.
 +    //​Pattern :​ (x1,​y1,​x2,​y2,​StartAngle,​EndAngle).
 +    img.DrawArc(0.43,​0.22,​0.57,​0.28,​0,​180);​
 +
 +    //​Add layout to app. App will be empty if no layout is added.
 +    app.AddLayout( lay );​
 +}
 +
 +function square(size)
 +{
 +    var ratio = app.GetDisplayWidth() /​
 +        app.GetDisplayHeight();​
 +    var ret={};​
 +    if (ratio >​= 1) //​ landscape
 +    {
 +        ret.w = size /​ ratio;​
 +        ret.h = size;​
 +    }
 +    else
 +    {
 +        ret.w = size;​
 +        ret.h = size * ratio;​
 +    }
 +    return ret;​
 +}
 +
 +</​code>​
sample_code/draw_smiley.txt · Last modified: 2015/09/16 07:18 by stevegarman