/**
* Generates N*N new DCT component toggles with the appropriate size, and with the correct DCT images and toggle behaviors.
*/
private void UpdateGridCount(int N)
{
// ====================================== Update Grid Layout ==========================================
// Change toggles per row to N
dctToggleGrid.constraintCount = N;
// Calculate size of each toggle to fit into grid
int gridSize = toggleGridWidth / N - 3; // In-between spacing of 3.
dctToggleGrid.cellSize = new Vector2(gridSize, gridSize);
// ======================================== Toggle Creation ===========================================
Transform dctToggleContainer = dctToggleGrid.GetComponent <Transform>();
int newChildCount = N * N;
// Enable prefab for cloning
togglePrefab.gameObject.SetActive(true);
// Remove previously created toggles
foreach (Transform child in dctToggleContainer)
{
Destroy(child.gameObject);
}
// Get DCT matrix of size N for later DCT image generation.
double[,] dctMatrix = GetDCTMatrix(N);
// Create toggle and load the respective DCT component image
int row = 0;
int col = 0;
for (int i = 0; i < newChildCount; i++)
{
Transform clone = Instantiate(togglePrefab, dctToggleGrid.GetComponent <Transform>());
Image imgComp = clone.GetChild(0).GetComponent <Image>();
clone.gameObject.name = row + " " + col;
// Add listener to inform ImageRenderer that a DCT component is toggled/untoggled
clone.GetComponent <Toggle>().onValueChanged.AddListener(delegate { imageRenderer.DCTCompUpdateCheck(); });
// Add DCT component image to toggle
LoadDCTComponentSprite(row, col, N, imgComp, dctMatrix);
// Track 2D index
col++;
if (col >= N)
{
row++;
col = 0;
}
}
// Disable prefab after finishing
togglePrefab.gameObject.SetActive(false);
// Update the displayed image. Use ToggleOn to bypass child destruction delay.
ToggleOn();
}
// ====================================================================================================================
// =============================================== BUTTON BEHAVIOR ====================================================
// ====================================================================================================================
/**
* Opens a file explorer and prompts player to select a PNG or JPG file; an error
* is displayed if any other files are selected. The image is converted to grey-scale
* and loaded to ImageRenderer. Message is sent to ImageRenderer to render the custom image.
**/
private void OpenExplorer()
{
errorMessage.text = "";
string[] path = StandaloneFileBrowser.OpenFilePanel("Select a PNG or JPG File...", "", "", false);
// Check if a valid file is selected.
if (path.Length == 0)
{
return;
}
else if (path[0].Length < 5)
{
return;
}
// Check for proper extensions
if (path[0].Substring(path[0].Length - 4) == ".png" || path[0].Substring(path[0].Length - 4) == ".jpg")
{
// Retrieve image file
WWW www = new WWW("file:///" + path[0]);
Texture2D image_Texture = www.texture;
int width = image_Texture.width;
int height = image_Texture.height;
// Convert image to greyscale
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
Color rgb = image_Texture.GetPixel(i, j);
float grey = (float)(0.299 * rgb[0] + 0.587 * rgb[1] + 0.114 * rgb[2]);
image_Texture.SetPixel(i, j, new Color(grey, grey, grey));
}
}
// Commit changes
image_Texture.Apply();
// Load the grey-scale image into the image panel
imagePanel.sprite = Sprite.Create(image_Texture, new Rect(0, 0, width, height), Vector2.zero);
// Sent "message" to Image_Behavior
imageRenderer.customImageRef = image_Texture;
imageRenderer.usingCustom = true;
imageRenderer.forceRefresh = true;
imageRenderer.DCTCompUpdateCheck();
}
else
{
errorMessage.text = "PNG or JPG Only!";
}
}