Moving camera

src/main/resources/ocelot/desktop/spritesheet.txt

@@ -1,11 +1,12 @@
-BorderB 3 25 2 8
-BorderT 0 25 2 10
-Circle 0 0 24 24
-Computer 50 0 16 16
-CornerBL 102 0 8 8
-CornerBR 111 0 8 8
-CornerTL 84 0 8 10
-CornerTR 93 0 8 10
-DefaultNode 25 0 24 24
-Empty 6 25 1 1
-Screen 67 0 16 16
+BackgroundPattern 0 0 304 304
+BorderB 308 25 2 8
+BorderT 305 25 2 10
+Circle 305 0 24 24
+Computer 355 0 16 16
+CornerBL 407 0 8 8
+CornerBR 416 0 8 8
+CornerTL 389 0 8 10
+CornerTR 398 0 8 10
+DefaultNode 330 0 24 24
+Empty 311 25 1 1
+Screen 372 0 16 16

src/main/scala/ocelot/desktop/ui/widget/WorkspaceView.scala

@@ -12,9 +12,9 @@ import scala.collection.mutable.ArrayBuffer
 
 class WorkspaceView extends Widget {
   private val nodes = ArrayBuffer[Node](new ComputerNode, new ScreenNode)
-  private var selection: Option[Node] = None
-  private var startMousePos = Vector2D(0, 0)
-  private var startNodePos = Vector2D(0, 0)
+  private var movingNode: Option[Node] = None
+  private var movingCamera = false
+  private var oldMousePos = Vector2D(0, 0)
   private var offset = Vector2D(0, 0)
 
   override val layout = new NoLayout(this)
@@ -23,33 +23,51 @@ class WorkspaceView extends Widget {
 
   eventHandlers += {
     case event: MouseEvent =>
-      if (event.state == MouseEvent.State.Press && event.button == MouseEvent.Button.Left)
-        selectNode(event)
-      else {
-        selection.foreach(_.clearHighlight())
-        selection = None
+      if (event.state == MouseEvent.State.Press) {
+        event.button match {
+          case MouseEvent.Button.Left => startMovingNode(event)
+          case MouseEvent.Button.Middle => startMovingCamera()
+          case _ =>
+        }
+      } else {
+        movingNode.foreach(_.clearHighlight())
+        movingNode = None
+        movingCamera = false
       }
   }
 
-  private def selectNode(event: MouseEvent): Unit = {
+  private def startMovingNode(event: MouseEvent): Unit = {
     val mousePos = UiHandler.mousePosition
     val gridPos = mousePos - offset
-    selection = nodes.find(_.bounds.contains(gridPos))
+    movingNode = nodes.find(_.bounds.contains(gridPos))
 
-    for (node <- selection) {
-      startMousePos = mousePos
-      startNodePos = node.position
+    for (node <- movingNode) {
+      oldMousePos = mousePos
       node.highlightMoving()
     }
   }
 
+  private def startMovingCamera(): Unit = {
+    val mousePos = UiHandler.mousePosition
+    oldMousePos = mousePos
+    movingCamera = true
+  }
+
   override def update(): Unit = {
     super.update()
 
-    for (node <- selection) {
+    if (movingCamera) {
       val mousePos = UiHandler.mousePosition
-      val translation = mousePos - startMousePos
-      node.position = startNodePos + translation
+      val translation = mousePos - oldMousePos
+      oldMousePos = mousePos
+      offset += translation
+    }
+
+    for (node <- movingNode) {
+      val mousePos = UiHandler.mousePosition
+      val translation = mousePos - oldMousePos
+      oldMousePos = mousePos
+      node.position += translation
 
       for (obstacle <- nodes) {
         if (obstacle != node)
@@ -69,9 +87,22 @@ class WorkspaceView extends Widget {
   }
 
   override def draw(g: Graphics): Unit = {
-    g.foreground = RGBAColor(20, 20, 20)
-    g.sprite = "Empty"
-    g.rect(position.x, position.y, size.width, size.height)
+    g.save()
+
+    val backgroundOffsetX = if (offset.x > 0) 304f - offset.x % 304f else -offset.x % 304f
+    val backgroundOffsetY = if (offset.y > 0) 304f - offset.y % 304f else -offset.y % 304f
+    val numRepeatsX = math.ceil((size.width + backgroundOffsetX) / 304f).asInstanceOf[Int]
+    val numRepeatsY = math.ceil((size.height + backgroundOffsetY) / 304f).asInstanceOf[Int]
+
+    g.translate(-backgroundOffsetX, -backgroundOffsetY)
+
+    for (x <- 0 to numRepeatsX) {
+      for (y <- 0 to numRepeatsY) {
+        g.sprite("BackgroundPattern", x * 304f, y * 304f, 304f, 304f)
+      }
+    }
+
+    g.restore()
 
     g.translate(offset.x + position.x, offset.y + position.y)
     nodes.foreach(_.draw(g))