private void handleFrameChange()
{
if (!IsInitialized || ViewModel.CurrentObject == null)
{
overworldPic.Source = null;
return;
}
EventObject.Frame currentFrame = ViewModel.CurrentFrame;
// If the frame is invalid, copy the previous frames and raise an event.
if (currentFrame == null)
{
copyPreviousFrames();
ViewModel.RaisePropertyChanged("AnimTableIndex");
ViewModel.RaisePropertyChanged("CurrentFrame");
return;
}
indexCount.Content = "of " + (ViewModel.CurrentObject.Frames.Count - 1);
BitmapImage fileBitmap = FileUtils.loadBitmapImage(currentFrame.Pic.FullPath);
// Make sure the object width/height is appropriate for the actual image.
EventObject currentObject = ViewModel.CurrentObject;
currentObject.Width = Math.Min(currentObject.Width, fileBitmap.PixelWidth);
currentObject.Height = Math.Min(currentObject.Height, fileBitmap.PixelHeight);
// Set max for framecount.
spriteFrame.Maximum = ((fileBitmap.PixelWidth / 8) / (spriteWidth.Value / 8)) - 1;
currentFrame.Index = Math.Min(currentFrame.Index, (int)spriteFrame.Maximum);
// Check to see if the width/height of the object is the same as the image.
if (currentObject.Width == fileBitmap.PixelWidth &&
currentObject.Height == fileBitmap.PixelHeight)
{
overworldPic.Source = fileBitmap;
spriteFrame.IsEnabled = false;
return;
}
// Otherwise, slice the image to get the specific frame.
overworldPic.Source = new CroppedBitmap(fileBitmap, new Int32Rect(
currentObject.Width * currentFrame.Index, /*y=*/ 0, currentObject.Width,
currentObject.Height));
spriteFrame.IsEnabled = true;
}
private void copyPreviousFrames()
{
int curIndex = ViewModel.AnimTableIndex;
ObservableCollection <EventObject.Frame> frames = ViewModel.CurrentObject.Frames;
int neededFrames = (curIndex - frames.Count) + 1;
if (neededFrames <= 0)
{
return;
}
EventObject.Frame lastValidFrame = frames[Math.Min(curIndex - 1, frames.Count - 1)];
int maxFrame = FileUtils.getImageWidth(lastValidFrame.Pic.FullPath);
maxFrame /= ViewModel.CurrentObject.Width;
for (int i = 0, e = neededFrames; i < e; ++i)
{
frames.Add(new EventObject.Frame()
{
Pic = lastValidFrame.Pic,
Index = Math.Min(maxFrame - 1, lastValidFrame.Index + i + 1)
});
}
}