/// <summary>
/// Handle user input.
/// </summary>
/// <param name="input">The helper for reading input from the user.</param>
public void HandleInput(InputState input)
{
//Let the GUI handle user input.
_GUI.HandleInput(input);
//Enable the DebugSystem to handle input.
_DebugSystem.HandleInput(input);
#region Camera
//If the CTRL button is not held down.
if (!input.IsKeyDown(Keys.LeftControl))
{
//Manage the camera movement.
if (input.IsKeyDown(Keys.W)) { MoveCamera(new Vector2(0, -1)); }
if (input.IsKeyDown(Keys.S)) { MoveCamera(new Vector2(0, 1)); }
if (input.IsKeyDown(Keys.A)) { MoveCamera(new Vector2(-1, 0)); }
if (input.IsKeyDown(Keys.D)) { MoveCamera(new Vector2(1, 0)); }
//Let the user zoom in and out.
if (input.IsKeyDown(Keys.Z)) { _Camera.Zoom(-.05f); }
if (input.IsKeyDown(Keys.X)) { _Camera.Zoom(.05f); }
}
#endregion
#region Editing
//If the CTRL button is down.
if (input.IsKeyDown(Keys.LeftControl))
{
//Manage the item movement.
if (input.IsKeyDown(Keys.W)) { MoveItem(new Vector2(0, -5)); }
if (input.IsKeyDown(Keys.S)) { MoveItem(new Vector2(0, 5)); }
if (input.IsKeyDown(Keys.A)) { MoveItem(new Vector2(-5, 0)); }
if (input.IsKeyDown(Keys.D)) { MoveItem(new Vector2(5, 0)); }
//Let the user rotate the item.
if (input.IsKeyDown(Keys.Q)) { RotateItem(-.01f); }
if (input.IsKeyDown(Keys.E)) { RotateItem(.01f); }
//Let the user scale the item.
if (input.IsKeyDown(Keys.Z)) { ScaleItem(new Vector2(-.05f, -.05f)); }
if (input.IsKeyDown(Keys.X)) { ScaleItem(new Vector2(.05f, .05f)); }
//Let the user copy the item.
if (input.IsNewKeyPress(Keys.V)) { CopyItem(Helper.GetMousePosition()); }
}
//If the GUI hasn't been clicked.
if (!_IsGUIClicked)
{
//Select an item.
if (input.IsNewLeftMouseClick()) { SelectItem(GetItemAtPosition(Helper.GetMousePosition())); }
//If the user wants to seize and move an item with the mouse.
if (input.IsNewLeftMousePress() && _SelectedItem != null)
{
//Handle the item grapple.
GrappleItem();
}
}
//If the user disengages the grapple function.
if (input.IsNewLeftMouseReleased())
{
//If the grapple joint exists.
if (_MouseGrappleJoint != null)
{
//Remove the grapple joint from the world simulation.
_Level.World.RemoveJoint(_MouseGrappleJoint);
_MouseGrappleJoint = null;
}
//Reset the grapple point.
_ItemGrapplePoint = Vector2.Zero;
}
#endregion
//Quickie.
if (input.IsKeyDown(Keys.N)) { SetUpTreeView(); }
if (input.IsNewKeyPress(Keys.M)) { ToggleGUI(); }
//Let the level handle user input.
_Level.HandleInput(input);
}
