private async void StartLoadingSubreddit()
{
try
{
var reddit = new RedditService();
var subreddit = await reddit.GetSubredditAsync("Terraria");
_resourceManager = new ResourceManager("Cache");
_resourceManager.Start();
_postsLeftToLoad = 20;
var postEnumerator = subreddit.EnumeratePosts(10000, 25).GetEnumerator();
int c = 0;
while (_processPosts)
{
while (_postsLeftToLoad > 0 && postEnumerator.MoveNext() && _processPosts)
{
var post = postEnumerator.Current;
_postsLeftToLoad--;
c++;
//if (!post.HasThumbnail) continue;
var graphic = new PostGraphicsObject(post, GraphicsDevice, _resourceManager);
lock (_postGraphics)
_postGraphics.Add(graphic);
DoObjectLayout();
}
Thread.Sleep(10);
}
Console.WriteLine("Posts iterated: " + c);
}
catch (Exception exc)
{
Console.WriteLine("Loading subreddit failed: " + exc);
}
}
protected override void Update(GameTime time)
{
Input.Update(time);
if (Input.IsKeyPressed(Keys.Escape))
{
if (OpenPost != null)
{
OpenPost = null;
_fullPostOffset = Vector2.Zero;
}
else
{
Exit();
}
}
Viewport view = GraphicsDevice.Viewport;
UpdateScroll(view, time);
if (OpenPost == null)
{
UpdateObjectVisibility(view, out _firstVisibleGraphic, out _lastVisibleGraphic);
if (_firstVisibleGraphic != -1 && _lastVisibleGraphic != -1)
{
RenderObjectGraphics(view, _firstVisibleGraphic, _lastVisibleGraphic);
ProcessMouse(_firstVisibleGraphic, _lastVisibleGraphic);
LoadThumbnails(_firstVisibleGraphic, _lastVisibleGraphic, 6);
if (_postsLeftToLoad == 0 && _lastVisibleGraphic + 15 > _postGraphics.Count)
{
_postsLeftToLoad += 5;
}
}
}
base.Update(time);
}
private void ProcessMouse(int firstVisible, int lastVisible)
{
var mousePos = Vector2.Transform(Input.MousePosition.ToVector2(), Matrix.Invert(_graphicsMatrix));
HoveredPost = null;
for (int i = firstVisible; i < lastVisible + 1; i++)
{
var graphic = _postGraphics[i];
if (graphic.Boundaries.Contains(mousePos))
{
if (Input.IsMousePressed(MouseButton.Left))
{
OpenPost = graphic;
}
else
{
HoveredPost = graphic;
}
break;
}
}
}
private void DrawFullPost(GameTime time, Viewport view, PostGraphicsObject post)
{
var builder = StringBuilderPool.Rent(post.Data.Title.Length + 5);
float maxCharsInLine = Math.Max(1, GetMaxCharsInView(_font40, view.Width * 1.1f));
PostGraphicsObject.DivideTextIntoLines(post.Data.Title, builder, (int)maxCharsInLine);
_spriteBatch.Begin(samplerState: SamplerState.LinearClamp);
_spriteBatch.DrawString(_font40, builder, new Vector2(8, 4), Color.White);
if (post.PreviewResponse != null && post.PreviewResponse.ContentLength > 0)
{
float p = (float)(post.PreviewResponse.BytesDownloaded / (decimal)post.PreviewResponse.ContentLength);
if (p >= 0 && p <= 1)
{
var pos = new Vector2(view.Width / 2f, view.Height / 2f);
_postLoadingBar.Draw(_spriteBatch, pos, 60, Color.White, 8, p);
}
}
_spriteBatch.End();
post.UploadPostTexture();
var postTex = post.PostTexture;
if (postTex != null)
{
SizeF titleSize = _font40.MeasureString(builder);
float marginX = 5;
var textureDst = new RectangleF(
marginX, titleSize.Height + 15, postTex.Width - marginX * 2, postTex.Height);
float maxWidth = view.Width - marginX * 2;
float zoom = maxWidth / textureDst.Width;
if (zoom < 1f)
{
textureDst.Width *= zoom;
textureDst.Height *= zoom;
}
const float scrollUpThreshold = 0;
float scrollDownThreshold = Math.Min(0, -(textureDst.Height + textureDst.Y + 5 - view.Height));
if (_fullPostOffset.Y > scrollUpThreshold)
{
_fullPostOffset.Y = MathHelper.Lerp(_fullPostOffset.Y, scrollUpThreshold, time.Delta * 30f);
}
else if (_fullPostOffset.Y < scrollDownThreshold)
{
_fullPostOffset.Y = MathHelper.Lerp(_fullPostOffset.Y, scrollDownThreshold, time.Delta * 30f);
}
_fullPostOffset.Y += MathHelper.Clamp(_smoothScroll * 10f * time.Delta, -350, 350);
textureDst.Position += _fullPostOffset;
_spriteBatch.Begin(samplerState: zoom < 1f ? SamplerState.LinearClamp : SamplerState.PointClamp);
_spriteBatch.DrawRectangle(textureDst + new RectangleF(-1, -1, 2, 2), Color.BlueViolet, 2f);
_spriteBatch.Draw(postTex, textureDst, Color.White);
_spriteBatch.End();
}
StringBuilderPool.Return(builder);
}
