From a12232f527666695c57a6014401c1a34c2fb6611 Mon Sep 17 00:00:00 2001
From: Kevin Chabowski <kevin@kch42.de>
Date: Sat, 17 Aug 2013 14:57:40 +0200
Subject: GUI is now locked on slow operations (e.g. Filling).

---
 main.go      | 17 +++++++++++++++--
 mapwidget.go | 31 ++++++++++++++++++++++++++++---
 tools.go     |  3 +++
 3 files changed, 46 insertions(+), 5 deletions(-)

diff --git a/main.go b/main.go
index 2e81dd6..3520de5 100644
--- a/main.go
+++ b/main.go
@@ -15,6 +15,7 @@ type GUI struct {
 	showbiomes *gtk.CheckButton
 
 	statusContext uint
+	lastStatus    string
 
 	mapw *MapWidget
 }
@@ -201,7 +202,7 @@ func (g *GUI) Init() {
 
 	hbox := gtk.NewHBox(false, 0)
 
-	g.mapw = NewMapWidget(g.reportError, g.updateInfo)
+	g.mapw = NewMapWidget(g.reportError, g.updateInfo, g.setBusy)
 	hbox.PackStart(g.mapw.DArea(), true, true, 3)
 
 	sidebar := g.mkSidebar()
@@ -221,6 +222,17 @@ func (g *GUI) Init() {
 	g.setTool(NewFillTool())
 }
 
+func (g *GUI) setBusy(b bool) {
+	g.window.SetSensitive(!b)
+	g.statusbar.Pop(g.statusContext)
+	if b {
+		g.statusbar.Push(g.statusContext, "!!! PLEASE WAIT !!!")
+
+	} else {
+		g.statusbar.Push(g.statusContext, g.lastStatus)
+	}
+}
+
 func (g *GUI) reportError(msg string) {
 	dlg := gtk.NewMessageDialog(g.window, gtk.DIALOG_MODAL|gtk.DIALOG_DESTROY_WITH_PARENT, gtk.MESSAGE_ERROR, gtk.BUTTONS_OK, msg)
 	dlg.Run()
@@ -229,8 +241,9 @@ func (g *GUI) reportError(msg string) {
 }
 
 func (g *GUI) updateInfo(x, z int, bio mcmap.Biome) {
+	g.lastStatus = fmt.Sprintf("X:%d, Z:%d, Biome:%s", x, z, bio)
 	g.statusbar.Pop(g.statusContext)
-	g.statusbar.Push(g.statusContext, fmt.Sprintf("X:%d, Z:%d, Biome:%s", x, z, bio))
+	g.statusbar.Push(g.statusContext, g.lastStatus)
 }
 
 func (g *GUI) mkUpdateToolFx(rb *gtk.RadioButton, t Tool) func() {
diff --git a/mapwidget.go b/mapwidget.go
index 29c5e0d..37a05d0 100644
--- a/mapwidget.go
+++ b/mapwidget.go
@@ -68,6 +68,9 @@ type MapWidget struct {
 
 	reportFail func(msg string)
 	updateInfo func(x, z int, bio mcmap.Biome)
+	setBusy    func(bool)
+
+	toolsEnabled bool
 
 	isInit bool
 
@@ -286,7 +289,27 @@ func (mw *MapWidget) compose() {
 }
 
 func (mw *MapWidget) useTool(x, z int) {
-	mw.tool.Do(mw.bio, mw, x, z)
+	gdk.ThreadsLeave()
+	defer gdk.ThreadsEnter()
+
+	if !mw.toolsEnabled {
+		return
+	}
+
+	if mw.tool.IsSlow() {
+		mw.toolsEnabled = false
+		mw.setBusy(true)
+
+		go func() {
+			mw.tool.Do(mw.bio, mw, x, z)
+			mw.setBusy(false)
+			mw.toolsEnabled = true
+
+			mw.redraw <- true
+		}()
+	} else {
+		mw.tool.Do(mw.bio, mw, x, z)
+	}
 }
 
 func (mw *MapWidget) movement(ctx *glib.CallbackContext) {
@@ -475,15 +498,17 @@ func (mw *MapWidget) SetBiomeAt(x, z int, bio mcmap.Biome) {
 
 	// Update tile
 	if tile, ok := mw.biotiles[pos]; ok {
+		gdk.ThreadsEnter()
 		drawable := tile.GetDrawable()
 		gc := gdk.NewGC(drawable)
 		gc.SetRgbFgColor(bioColors[bio])
 		drawable.DrawRectangle(gc, true, bx*zoom, bz*zoom, zoom, zoom)
+		gdk.ThreadsLeave()
 	}
 }
 
-func NewMapWidget(reportFail func(msg string), updateInfo func(x, z int, bio mcmap.Biome)) *MapWidget {
-	mw := &MapWidget{reportFail: reportFail, updateInfo: updateInfo}
+func NewMapWidget(reportFail func(msg string), updateInfo func(x, z int, bio mcmap.Biome), setBusy func(bool)) *MapWidget {
+	mw := &MapWidget{reportFail: reportFail, updateInfo: updateInfo, setBusy: setBusy, toolsEnabled: true}
 	mw.init()
 	return mw
 }
diff --git a/tools.go b/tools.go
index 6397223..e4fd34a 100644
--- a/tools.go
+++ b/tools.go
@@ -15,6 +15,7 @@ type XZPos struct {
 
 type Tool interface {
 	SingleClick() bool // Whether only one click should be performed (true) or the action should be repeated, if the mouse is dragged
+	IsSlow() bool
 	Do(bio mcmap.Biome, biogs BiomeGetSetter, x, z int)
 }
 
@@ -23,6 +24,7 @@ type drawTool struct {
 }
 
 func (d *drawTool) SingleClick() bool { return false }
+func (d *drawTool) IsSlow() bool      { return false }
 
 func (d *drawTool) Do(bio mcmap.Biome, biogs BiomeGetSetter, x, z int) {
 	rad := d.radGetter()
@@ -44,6 +46,7 @@ func NewDrawTool(radGetter func() int) *drawTool {
 type fillTool struct{}
 
 func (f *fillTool) SingleClick() bool { return true }
+func (f *fillTool) IsSlow() bool      { return true }
 
 func chkBounds(x, z, xStart, zStart, xEnd, zEnd int) bool {
 	return (x >= xStart) && (z >= zStart) && (x < xEnd) && (z < zEnd)
-- 
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