chfei/HandyControl
1
0 Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

merge pr

Browse Source
This commit is contained in:
NaBian committed 2019-07-20 19:42:40 +08:00
1 parent 0ae2576c60
commit a13e41bdc3
2 files changed
+35 -24
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

src/Shared/HandyControl_Shared/Controls/Image/ImageBlock.cs
+28 -17
View File
@@ -11,12 +11,18 @@ namespace HandyControl.Controls
{
private readonly DispatcherTimer _dispatcherTimer;
private BitmapSource _source;
private int _indexMax;
private int _indexMin;
private int _currentIndex;
private int _blockWidth;
private int _blockHeight;
public ImageBlock()
{
_dispatcherTimer = new DispatcherTimer
@@ -26,17 +32,20 @@ namespace HandyControl.Controls
_dispatcherTimer.Tick += DispatcherTimer_Tick;
}
private void OnPositionsChanged()
private void UpdateDatas()
{
if (_source == null) return;
_indexMin = StartRow * Columns + StartColumn;
_indexMax = EndRow * Columns + EndColumn;
_currentIndex = _indexMin;
_blockWidth = _source.PixelWidth / Columns;
_blockHeight = _source.PixelHeight / Rows;
}
private static void OnPositionsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var ctl = (ImageBlock)d;
ctl.OnPositionsChanged();
ctl.UpdateDatas();
}
private void DispatcherTimer_Tick(object sender, EventArgs e) => InvalidateVisual();
@@ -106,7 +115,7 @@ namespace HandyControl.Controls
public static readonly DependencyProperty ColumnsProperty = DependencyProperty.Register(
"Columns", typeof(int), typeof(ImageBlock), new FrameworkPropertyMetadata(ValueBoxes.Int1Box,
FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender), obj => (int)obj >= 1);
FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender, OnPositionsChanged), obj => (int)obj >= 1);
public int Columns
{
@@ -116,7 +125,7 @@ namespace HandyControl.Controls
public static readonly DependencyProperty RowsProperty = DependencyProperty.Register(
"Rows", typeof(int), typeof(ImageBlock), new FrameworkPropertyMetadata(ValueBoxes.Int1Box,
FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender), obj => (int)obj >= 1);
FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender, OnPositionsChanged), obj => (int)obj >= 1);
public int Rows
{
@@ -141,7 +150,14 @@ namespace HandyControl.Controls
public static readonly DependencyProperty SourceProperty = DependencyProperty.Register(
"Source", typeof(ImageSource), typeof(ImageBlock), new FrameworkPropertyMetadata(default(ImageSource),
FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender));
FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender, OnSourceChanged));
private static void OnSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var ctl = (ImageBlock)d;
ctl._source = e.NewValue as BitmapSource;
ctl.UpdateDatas();
}
public ImageSource Source
{
@@ -151,27 +167,22 @@ namespace HandyControl.Controls
protected override void OnRender(DrawingContext dc)
{
if (Source != null && Source is BitmapSource source)
{
// ReSharper disable once AssignNullToNotNullAttribute
var croppedBitmap = new CroppedBitmap(source,
CalDisplayRect(source.PixelWidth / Columns, source.PixelHeight / Rows));
dc.DrawImage(croppedBitmap, new Rect(0, 0, RenderSize.Width, RenderSize.Height));
}
if (_source == null) return;
var croppedBitmap = new CroppedBitmap(_source, CalDisplayRect());
dc.DrawImage(croppedBitmap, new Rect(0, 0, RenderSize.Width, RenderSize.Height));
}
private Int32Rect CalDisplayRect(int width, int height)
private Int32Rect CalDisplayRect()
{
if (_currentIndex > _indexMax)
{
_currentIndex = _indexMin;
}
var x = _currentIndex % Columns * width;
// ReSharper disable once PossibleLossOfFraction
var y = _currentIndex / Columns * height;
var x = _currentIndex % Columns * _blockWidth;
var y = _currentIndex / Columns * _blockHeight;
var rect = new Int32Rect(x, y, width, height);
var rect = new Int32Rect(x, y, _blockWidth, _blockHeight);
_currentIndex++;
return rect;
}