/// <summary>Creates a single UI element for the given HTML node and HTML view.</summary>
/// <param name="node">The node.</param>
/// <param name="htmlView">The text block.</param>
/// <returns>The UI element.</returns>
public override DependencyObject CreateControl(HtmlNode node, IHtmlView htmlView)
{
try
{
var imageUri = node.Attributes["src"];
var height = 0;
if (node.Attributes.ContainsKey("height"))
int.TryParse(node.Attributes["height"], out height);
var width = 0;
if (node.Attributes.ContainsKey("width"))
int.TryParse(node.Attributes["width"], out width);
if (height == 1 && width == 1)
return null;
var image = new Image();
image.Width = 0;
image.Height = 0;
var bitmapImage = new BitmapImage(new Uri(imageUri));
var imageBlock = new ImageBlock
{
Image = image,
UserHeight = height,
UserWidth = width,
Source = bitmapImage
};
bitmapImage.ImageOpened += delegate { imageBlock.Update(htmlView.ActualWidth); };
image.HorizontalAlignment = HorizontalAlignment.Left;
image.Source = bitmapImage;
image.Margin = new Thickness(0, htmlView.ParagraphMargin, 0, htmlView.ParagraphMargin);
if (width > 0)
image.Width = width;
if (height > 0)
image.Height = height;
htmlView.SizeDependentControls.Add(imageBlock);
return new ContentPresenter { Content = image };
}
catch
{
return null;
}
}
public override DependencyObject GenerateSingle(HtmlNode node, IHtmlTextBlock textBlock)
{
try
{
var uri = node.Attributes["src"];
var height = 0;
if (node.Attributes.ContainsKey("height"))
int.TryParse(node.Attributes["height"], out height);
var width = 0;
if (node.Attributes.ContainsKey("width"))
int.TryParse(node.Attributes["width"], out width);
if (height == 1 && width == 1)
return null;
var image = new Image();
var imgSource = new BitmapImage(new Uri(uri));
var block = new ImageBlock
{
Image = image,
UserHeight = height,
UserWidth = width,
Source = imgSource
};
imgSource.ImageOpened += delegate { block.Update(textBlock.ActualWidth); };
image.HorizontalAlignment = HorizontalAlignment.Left;
image.Source = imgSource;
image.Margin = new Thickness(0, textBlock.ParagraphMargin, 0, textBlock.ParagraphMargin);
if (width > 0)
image.Width = width;
if (height > 0)
image.Height = height;
textBlock.SizeDependentControls.Add(block);
return image;
}
catch
{
return null;
}
}
static void SetImageBlock (byte[] gifBytes, ref int byteIndex, ref GifData gifData)
{
ImageBlock ib = new ImageBlock ();
// Image Separator(1 Byte)
// 0x2c
ib.imageSeparator = gifBytes[byteIndex];
byteIndex++;
// Image Left Position(2 Bytes)
ib.imageLeftPosition = BitConverter.ToUInt16 (gifBytes, byteIndex);
byteIndex += 2;
// Image Top Position(2 Bytes)
ib.imageTopPosition = BitConverter.ToUInt16 (gifBytes, byteIndex);
byteIndex += 2;
// Image Width(2 Bytes)
ib.imageWidth = BitConverter.ToUInt16 (gifBytes, byteIndex);
byteIndex += 2;
// Image Height(2 Bytes)
ib.imageHeight = BitConverter.ToUInt16 (gifBytes, byteIndex);
byteIndex += 2;
// 1 Byte
{
// Local Color Table Flag(1 Bit)
ib.localColorTableFlag = (gifBytes[byteIndex] & 128) == 128; // 0b10000000
// Interlace Flag(1 Bit)
ib.interlaceFlag = (gifBytes[byteIndex] & 64) == 64; // 0b01000000
// Sort Flag(1 Bit)
ib.sortFlag = (gifBytes[byteIndex] & 32) == 32; // 0b00100000
// Reserved(2 Bits)
// Unused
// Size of Local Color Table(3 Bits)
int val = (gifBytes[byteIndex] & 7) + 1;
ib.sizeOfLocalColorTable = (int) Math.Pow (2, val);
byteIndex++;
}
if (ib.localColorTableFlag) {
// Local Color Table(0～255×3 Bytes)
ib.localColorTable = new List<byte[]> ();
for (int i = byteIndex; i < byteIndex + (ib.sizeOfLocalColorTable * 3); i += 3) {
ib.localColorTable.Add (new byte[] { gifBytes[i], gifBytes[i + 1], gifBytes[i + 2] });
}
byteIndex = byteIndex + (ib.sizeOfLocalColorTable * 3);
}
// LZW Minimum Code Size(1 Byte)
ib.LzwMinimumCodeSize = gifBytes[byteIndex];
byteIndex++;
// Block Size & Image Data List
while (true) {
// Block Size(1 Byte)
byte blockSize = gifBytes[byteIndex];
byteIndex++;
if (blockSize == 0x00) {
// Block Terminator(1 Byte)
break;
}
var imageDataBlock = new ImageBlock.ImageDataBlock ();
imageDataBlock.blockSize = blockSize;
// Image Data(? Bytes)
imageDataBlock.imageData = new byte[imageDataBlock.blockSize];
for (int i = 0; i < imageDataBlock.imageData.Length; i++) {
imageDataBlock.imageData[i] = gifBytes[byteIndex];
byteIndex++;
}
if (ib.imageDataList == null) {
ib.imageDataList = new List<ImageBlock.ImageDataBlock> ();
}
ib.imageDataList.Add (imageDataBlock);
}
if (gifData.imageBlockList == null) {
gifData.imageBlockList = new List<ImageBlock> ();
}
gifData.imageBlockList.Add (ib);
}
public ImageListViewItem(ImageBlock ib)
: base()
{
this.ImageBlock = ib;
}
/// <summary>
/// Set texture pixel row
/// </summary>
static void SetTexturePixelRow (Texture2D tex, int y, ImageBlock imgBlock, byte[] decodedData, ref int dataIndex, List<byte[]> colorTable, Color32? bgColor, int transparentIndex, bool useBeforeTex)
{
// Row no (0~)
int row = tex.height - 1 - y;
for (int x = 0; x < tex.width; x++) {
// Line no (0~)
int line = x;
// Out of image blocks
if (row < imgBlock.imageTopPosition ||
row >= imgBlock.imageTopPosition + imgBlock.imageHeight ||
line < imgBlock.imageLeftPosition ||
line >= imgBlock.imageLeftPosition + imgBlock.imageWidth) {
if (useBeforeTex == false && bgColor != null) {
tex.SetPixel (x, y, bgColor.Value);
}
continue;
}
// Out of decoded data
if (dataIndex >= decodedData.Length) {
tex.SetPixel (x, y, Color.black);
// Debug.LogError ("dataIndex exceeded the size of decodedData. dataIndex:" + dataIndex + " decodedData.Length:" + decodedData.Length + " y:" + y + " x:" + x);
dataIndex++;
continue;
}
// Get pixel color from color table
byte colorIndex = decodedData[dataIndex];
if (colorTable == null || colorTable.Count <= colorIndex) {
Debug.LogError ("colorIndex exceeded the size of colorTable. colorTable.Count:" + colorTable.Count + " colorIndex:" + colorIndex);
dataIndex++;
continue;
}
byte[] rgb = colorTable[colorIndex];
// Set alpha
byte alpha = transparentIndex >= 0 && transparentIndex == colorIndex ? (byte) 0 : (byte) 255;
if (alpha != 0 || useBeforeTex == false) {
Color32 col = new Color32 (rgb[0], rgb[1], rgb[2], alpha);
tex.SetPixel (x, y, col);
}
dataIndex++;
}
}
/// <summary>
/// Get color table (local or global)
/// </summary>
static List<byte[]> GetColorTable (GifData gifData, ImageBlock imgBlock, ref Color32? bgColor)
{
var colorTable = imgBlock.localColorTableFlag ? imgBlock.localColorTable : gifData.globalColorTable;
if (imgBlock.localColorTableFlag) {
// Set background color from local color table
byte[] bgRgb = imgBlock.localColorTable[gifData.bgColorIndex];
bgColor = new Color32 (bgRgb[0], bgRgb[1], bgRgb[2], 255);
}
return colorTable;
}
/// <summary>
/// Get decoded image data from ImageBlock
/// </summary>
static byte[] GetDecodedData (ImageBlock imgBlock)
{
// Combine LZW compressed data
List<byte> lzwData = new List<byte> ();
foreach (var imageData in imgBlock.imageDataList) {
foreach (var data in imageData.imageData) {
lzwData.Add (data);
}
}
// LZW decode
int needDataSize = imgBlock.imageHeight * imgBlock.imageWidth;
byte[] decodedData = DecodeGifLZW (lzwData, imgBlock.LzwMinimumCodeSize, needDataSize);
// Sort interlace GIF
if (imgBlock.interlaceFlag) {
decodedData = SortInterlaceGifData (decodedData, imgBlock.imageWidth);
}
return decodedData;
}
//User section for bussines logic
//Your code should be inserted here
protected async Task UserSection()
{
_screenView = Screen.CreateElement("Design.ScreenView");
_screenList = Screen.CreateElement("Design.ScreenList");
_screenInfo = Screen.CreateElement("Design.ScreenInfo");
_state = AppState.List;
#region init
// load Screen List controls
screenList_List = _screenList.GetChildByName("MainList") as ListBox;
screenList_List.Clickable = true;
screenList_List.Clicked += screenList_List_Clicked;
screenList_BtAdd = _screenList.GetChildByName("BtAdd") as SelectableArea;
screenList_BtAdd.Clicked += screenList_BtAdd_Clicked;
// load screen info controls
_screenInfo_Caption = _screenInfo.GetChildByName("tbCaption") as TextBlock;
_screenInfo_MainText = _screenInfo.GetChildByName("tbMainText") as TextBlock;
_screenInfo_BtBack = _screenInfo.GetChildByName("BtBack") as SelectableArea;
_screenInfo_BtBack.Clicked += BackToSCreenList;
// load screen view controls
_screenView_Image = _screenView.GetChildByName("MainImage") as ImageBlock;
_screenView_CameraName = _screenView.GetChildByName("TlName") as TextBlock;
_screenView_BtBack = _screenView.GetChildByName("BtBack") as SelectableArea;
_screenView_BtBack.Clicked += BackToSCreenList;
// qrcode reader
_barcodeReader = new BarcodeReader(this);
_barcodeReader.BarcodeReady += (s, be) =>
{
if (_barcodeReader.RC == FunctionRC.OK)
{
AddCamera(_barcodeReader.MainData);
}
else
{
// todo error reporting
//barcodeState = TPositioningState.ErrorReceived;
}
};
#endregion
_cameras = new List<string>();
_state = AppState.List;
AddCamera("100-066e23cd012e8f79afc37722e07bf694");
AddCamera("100-f0a176294a5c51a822ee6f4c0ae89a2c");
AddCamera("100-2033519638a3a4abb9b41d3a04bdb666");
#if false
// можно включить
AddCamera("100-2fbb74c566c49f4cfb6e2ea2ce1c9b4d");
AddCamera("100-40580f419398b68e0a18fa0fc319101b");
AddCamera("100-1bb9cf88076de6341a294182a49c6cf5");
#endif
for (; ; )
{
switch (_state)
{
case AppState.List:
Screen.Content = _screenList;
break;
case AppState.StartingView:
// start timer
Schedule(1000, GetPicture);
_screenInfo_Caption.Text = "Подключение";
_screenInfo_MainText.Text = "Пожалуйста, подождите. Идет подключение...";
Screen.Content = _screenInfo;
break;
case AppState.View:
_screenView_Image.Image = _lastImage;
_screenView_CameraName.Text = _cameras[_activeCamera];
Screen.Content = _screenView;
break;
case AppState.Error:
Screen.Content = _screenInfo;
break;
}
await Wait();
}
}
