public Preview()
{
var t = PrepareChessTexture(Theme.Colors.ZebraColor1.Transparentify(0.5f), Theme.Colors.ZebraColor2);
const float ChessCellSize = 50;
//Color4 Color1 = Core.UserPreferences.Instance.Get<UserPreferences>().BackgroundColorA;
//Color4 Color2 = Core.UserPreferences.Instance.Get<UserPreferences>().BackgroundColorB;
RootWidget = new ThemedScrollView();
RootWidget.Content.Layout = new FlowLayout {
Spacing = 5.0f,
};
RootWidget.Content.Padding = new Thickness(5.0f);
RootWidget.CompoundPresenter.Insert(1, new SyncDelegatePresenter <Widget>((w) => {
w.PrepareRendererState();
var ratio = ChessCellSize * 1.0f;
Renderer.DrawSprite(
t,
Color4.White,
Vector2.Zero,
w.Size,
-Vector2.Zero / ratio,
(w.Size - Vector2.Zero) / ratio);
}));
RootWidget.Updated += (dt) => {
if (RootWidget.IsMouseOver())
{
if (!RootWidget.Input.IsKeyPressed(Key.Control))
{
return;
}
int zoomDelta = 0;
if (RootWidget.Input.WasKeyPressed(Key.MouseWheelUp))
{
zoomDelta = 1;
}
if (RootWidget.Input.WasKeyPressed(Key.MouseWheelDown))
{
zoomDelta = -1;
}
if (zoomDelta != 0)
{
for (int i = 0; i < zoom.Count; i++)
{
var z = zoom[i];
int newZoom = Mathf.Clamp(z.Item1 + zoomDelta, 0, z.Item2);
if (newZoom != z.Item1)
{
zoom[i] = new Tuple <int, int>(newZoom, z.Item2);
}
}
ApplyZoom();
}
}
};
}
private void ProcessDragState(float dt)
{
var input = scrollView.Input;
switch (dragState)
{
case DragState.None: {
if (scrollView.IsMouseOver())
{
if (input.ConsumeKeyPress(Key.Mouse0))
{
dragEndPosition = dragStartPosition = scrollView.Content.LocalMousePosition();
dragState = DragState.WaitingForSelecting;
}
if (input.ConsumeKeyRelease(Key.Mouse1))
{
dragState = DragState.None;
selection.Clear();
SystemShellContextMenu.Instance.Show(model.CurrentPath);
}
}
break;
}
case DragState.Selecting: {
if (Window.Current.Input.WasKeyReleased(Key.Mouse0))
{
Window.Current.Input.ConsumeKey(Key.Mouse0);
scrollView.SetFocus();
dragState = DragState.None;
}
dragEndPosition = scrollView.Content.LocalMousePosition();
var scrollOffset = 0.0f;
if (scrollView.LocalMousePosition().Y < 0)
{
scrollOffset = scrollView.LocalMousePosition().Y;
}
else if (scrollView.LocalMousePosition().Y > scrollView.Size.Y)
{
scrollOffset = scrollView.LocalMousePosition().Y - scrollView.Size.Y;
}
scrollView.ScrollPosition += Math.Sign(scrollOffset) * Mathf.Sqr(scrollOffset) * 0.1f * dt;
scrollView.ScrollPosition = Mathf.Clamp(scrollView.ScrollPosition, scrollView.MinScrollPosition, scrollView.MaxScrollPosition);
Window.Current.Invalidate();
}
break;
case DragState.WaitingForDragging:
if ((dragStartPosition - Window.Current.Input.MousePosition).Length > 5.0f)
{
dragState = DragState.Dragging;
CommonWindow.Current.DragFiles(selection.ToArray());
}
if (
Window.Current.Input.WasKeyReleased(Key.Mouse0) ||
Window.Current.Input.WasKeyReleased(Key.Mouse0DoubleClick)
)
{
dragState = DragState.None;
Window.Current.Input.ConsumeKey(Key.Mouse0);
}
break;
case DragState.WaitingForSelecting:
if (input.ConsumeKeyRelease(Key.Mouse0))
{
dragState = DragState.None;
if (!input.IsKeyPressed(Key.Control) && !input.IsKeyPressed(Key.Shift))
{
selection.Clear();
}
}
else if (input.IsKeyPressed(Key.Mouse0))
{
if ((scrollView.Content.LocalMousePosition() - dragStartPosition).Length > 6.0f)
{
dragState = DragState.Selecting;
if (input.IsKeyPressed(Key.Control))
{
savedSelection = selection.Clone();
}
else
{
savedSelection = null;
}
}
}
break;
case DragState.Dragging:
if (Window.Current.Input.WasKeyReleased(Key.Mouse0))
{
Window.Current.Input.ConsumeKey(Key.Mouse0);
dragState = DragState.None;
}
break;
}
}
