draw2d/samples/README.md

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2015-07-10 00:11:22 +00:00
draw2d samples
==============
Various Samples to using draw2d
Using the image backend
-----------------------
The following Go code draws the android sample on a png image:
```
import (
"image"
"github.com/llgcode/draw2d"
"github.com/llgcode/draw2d/samples/android"
)
function main(){}
// Initialize the graphic context on an RGBA image
dest := image.NewRGBA(image.Rect(0, 0, 297, 210.0))
gc := draw2d.NewGraphicContext(dest)
// Draw Android logo
fn, err := android.Main(gc, "png")
if err != nil {
t.Errorf("Drawing %q failed: %v", fn, err)
return
}
// Save to png
err = draw2d.SaveToPngFile(fn, dest)
if err != nil {
t.Errorf("Saving %q failed: %v", fn, err)
}
}
```
Using the pdf backend
---------------------
The following Go code draws the android sample on a pdf document:
```
import (
"image"
"github.com/llgcode/draw2d/draw2dpdf"
"github.com/llgcode/draw2d/samples/android"
)
function main(){}
// Initialize the graphic context on a pdf document
dest := draw2dpdf.NewPdf("L", "mm", "A4")
gc := draw2dpdf.NewGraphicContext(dest)
// Draw Android logo
fn, err := android.Main(gc, "png")
if err != nil {
t.Errorf("Drawing %q failed: %v", fn, err)
return
}
// Save to pdf
err = draw2dpdf.SaveToPdfFile(fn, dest)
if err != nil {
t.Errorf("Saving %q failed: %v", fn, err)
}
}
```
Testing
-------
These samples are run as tests from the root package folder `draw2d` by:
```
go test ./...
```
Or if you want to run with test coverage:
```
go test -cover ./... | grep -v "no test"
```
The following files are responsible to run the image tests:
```
draw2d/test_test.go
draw2d/samples_test.go
```
The following files are responsible to run the pdf tests:
```
draw2d/pdf/test_test.go
draw2dpdf/samples_test.go
```