From e8e1f6b51b1ecafff7f6f348d240161d20ab0db6 Mon Sep 17 00:00:00 2001
From: Kevin Chabowski <kevin@kch42.de>
Date: Wed, 14 Aug 2013 16:46:45 +0200
Subject: Added Tools

* tool is now Tool and is defined as an interface
* toolFill and toolDraw implemented
* Updated toolbar
---
 main.go  | 19 ++++++---------
 tools.go | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 88 insertions(+), 12 deletions(-)
 create mode 100644 tools.go

diff --git a/main.go b/main.go
index b300034..9d432db 100644
--- a/main.go
+++ b/main.go
@@ -7,17 +7,12 @@ import (
 	"github.com/mattn/go-gtk/gtk"
 )
 
-type tool int
-
-const (
-	ToolDraw tool = iota
-	ToolFill
-)
-
 type GUI struct {
 	window     *gtk.Window
 	statusbar  *gtk.Statusbar
 	showbiomes *gtk.CheckButton
+
+	tool Tool
 }
 
 func (g *GUI) openWorldDlg() {
@@ -145,7 +140,7 @@ func (g *GUI) mkToolbox() *gtk.ScrolledWindow {
 
 	fill := gtk.NewRadioButtonWithLabel(nil, "Fill")
 	fill.SetActive(true)
-	fill.Connect("toggled", g.mkUpdateToolFx(fill, ToolFill))
+	fill.Connect("toggled", g.mkUpdateToolFx(fill, NewFillTool()))
 
 	draw := gtk.NewRadioButtonWithLabel(fill.GetGroup(), "Draw")
 	drawRadius := gtk.NewSpinButtonWithRange(1, 20, 1)
@@ -153,7 +148,7 @@ func (g *GUI) mkToolbox() *gtk.ScrolledWindow {
 	drawHBox.PackStart(draw, true, true, 3)
 	drawHBox.PackStart(gtk.NewLabel("Radius:"), false, false, 3)
 	drawHBox.PackEnd(drawRadius, false, false, 3)
-	draw.Connect("toggled", g.mkUpdateToolFx(draw, ToolDraw))
+	draw.Connect("toggled", g.mkUpdateToolFx(draw, NewDrawTool(func() int { return int(drawRadius.GetValue()) })))
 
 	vbox.PackStart(fill, false, false, 3)
 	vbox.PackStart(drawHBox, false, false, 3)
@@ -206,7 +201,7 @@ func (g *GUI) Init() {
 	g.window.Connect("destroy", g.exitApp)
 }
 
-func (g *GUI) mkUpdateToolFx(rb *gtk.RadioButton, t tool) func() {
+func (g *GUI) mkUpdateToolFx(rb *gtk.RadioButton, t Tool) func() {
 	return func() {
 		if rb.GetActive() {
 			g.setTool(t)
@@ -222,8 +217,8 @@ func (g *GUI) mkUpdateBiomeFx(rb *gtk.RadioButton, bio mcmap.Biome) func() {
 	}
 }
 
-func (g *GUI) setTool(t tool) {
-	fmt.Printf("Tool %d\n", t)
+func (g *GUI) setTool(t Tool) {
+	g.tool = t
 }
 
 func (g *GUI) setBiome(bio mcmap.Biome) {
diff --git a/tools.go b/tools.go
new file mode 100644
index 0000000..ffb763a
--- /dev/null
+++ b/tools.go
@@ -0,0 +1,81 @@
+package main
+
+import (
+	"github.com/kch42/gomcmap/mcmap"
+)
+
+type BiomeGetter interface {
+	GetBiome(x, z int) (mcmap.Biome, bool)
+}
+
+type XZPos struct {
+	X, Z int
+}
+
+type Change map[XZPos]mcmap.Biome
+
+type Tool interface {
+	SingleClick() bool // Whether only one click should be performed (true) or the action should be repeated, if the mouse is dragged
+	Do(bio mcmap.Biome, bioget BiomeGetter, x, z int) Change
+}
+
+type drawTool struct {
+	radGetter func() int
+}
+
+func (d *drawTool) SingleClick() bool { return false }
+
+func (d *drawTool) Do(bio mcmap.Biome, bioget BiomeGetter, x, z int) Change {
+	rad := d.radGetter()
+	if rad <= 0 {
+		return nil
+	}
+
+	change := make(Change)
+	for xp := x - (rad - 1); xp < x+rad; xp++ {
+		for zp := z - (rad - 1); zp < z+rad; zp++ {
+			change[XZPos{xp, zp}] = bio
+		}
+	}
+
+	return change
+}
+
+func NewDrawTool(radGetter func() int) *drawTool {
+	return &drawTool{radGetter}
+}
+
+type fillTool struct{}
+
+func (f *fillTool) SingleClick() bool { return true }
+
+func (f *fillTool) Do(bio mcmap.Biome, bioget BiomeGetter, x, z int) Change {
+	oldbio, ok := bioget.GetBiome(x, z)
+	if !ok {
+		return nil
+	}
+
+	change := make(Change)
+	floodfill(oldbio, bio, bioget, x, z, change)
+	return change
+}
+
+func floodfill(oldbio, newbio mcmap.Biome, bioget BiomeGetter, x, z int, change Change) {
+	pos := XZPos{x, z}
+	if _, ok := change[pos]; ok {
+		return
+	}
+
+	if bio, ok := bioget.GetBiome(x, z); ok && (bio == oldbio) {
+		change[pos] = newbio
+
+		floodfill(oldbio, newbio, bioget, x-1, z, change)
+		floodfill(oldbio, newbio, bioget, x+1, z, change)
+		floodfill(oldbio, newbio, bioget, x, z-1, change)
+		floodfill(oldbio, newbio, bioget, x, z+1, change)
+	}
+}
+
+func NewFillTool() *fillTool {
+	return new(fillTool)
+}
-- 
cgit v1.2.3-54-g00ecf