NatTable/src/org/eclipse/nebula/widgets/nattable/renderer/javafx/graphics/JavaFXGraphicsContext.xtend

package org.eclipse.nebula.widgets.nattable.renderer.javafx.graphics

import com.sun.javafx.tk.Toolkit
import org.eclipse.nebula.widgets.nattable.core.graphics.Color
import org.eclipse.nebula.widgets.nattable.core.graphics.GraphicsContext

class JavaFXGraphicsContext implements GraphicsContext {
	
	val javafx.scene.canvas.GraphicsContext gc
	
	new(javafx.scene.canvas.GraphicsContext gc) {
		this.gc = gc
	}
	
	override pushState() {
		gc.save
	}
	
	override popState() {
		gc.restore
	}
	
	override setForegroundColor(Color foregroundColor) {
		gc.stroke = new javafx.scene.paint.Color(
			foregroundColor.red as double / 255,
			foregroundColor.green as double / 255,
			foregroundColor.blue as double / 255,
			foregroundColor.alpha as double / 255
		)
	}
	
	override drawLine(int x1, int y1, int x2, int y2) {
		gc.strokeLine(x1, y1, x2, y2)
	}
	
	override drawText(String text, int x, int y) {
		gc.strokeText(text, x, y)
	}
	
	override calculateTextWidth(String text) {
		val fontMetrics = Toolkit::toolkit.fontLoader.getFontMetrics(gc.font)
		fontMetrics.computeStringWidth(text)
	}
	
}