draw2d/samples/helloworld/helloworld.go

57 lines
1.5 KiB
Go

// Copyright 2010 The draw2d Authors. All rights reserved.
// created: 21/11/2010 by Laurent Le Goff, Stani Michiels
// Package helloworld displays multiple "Hello World" (one rotated)
// in a rounded rectangle.
package helloworld
import (
"fmt"
"image"
"image/color"
"math"
"github.com/llgcode/draw2d"
"github.com/llgcode/draw2d/samples"
)
// Main draws "Hello World" and returns the filename. This should only be
// used during testing.
func Main(gc draw2d.GraphicContext, ext string) (string, error) {
// Draw hello world
Draw(gc, fmt.Sprintf("Hello World %d dpi", gc.GetDPI()))
// Return the output filename
return samples.Output("helloworld", ext), nil
}
// Draw "Hello World"
func Draw(gc draw2d.GraphicContext, text string) {
// Draw a rounded rectangle using default colors
draw2d.RoundRect(gc, 5, 5, 292, 205, 10, 10)
gc.FillStroke()
// Set the font luximbi.ttf
gc.SetFontData(draw2d.FontData{
Name: "luxi",
Family: draw2d.FontFamilyMono,
Style: draw2d.FontStyleBold | draw2d.FontStyleItalic})
// Set the fill text color to black
gc.SetFillColor(image.Black)
gc.SetDPI(72)
gc.SetFontSize(14)
// Display Hello World
gc.FillString(text)
gc.FillStringAt(text, 8, 52)
gc.Save()
gc.SetFillColor(color.NRGBA{0xFF, 0x33, 0x33, 0xFF})
gc.SetStrokeColor(color.NRGBA{0xFF, 0x33, 0x33, 0xFF})
gc.Translate(145, 85)
gc.StrokeStringAt(text, -50, 0)
gc.Rotate(math.Pi / 4)
gc.SetFillColor(color.NRGBA{0x33, 0x33, 0xFF, 0xFF})
gc.SetStrokeColor(color.NRGBA{0x33, 0x33, 0xFF, 0xFF})
gc.StrokeString(text)
gc.Restore()
}