private async void WallPapersList_ItemClick(object sender, ItemClickEventArgs e)
{
foreach (var item in WallPapersList.Items)
{
(((WallPapersList.ContainerFromItem(item) as GridViewItem).ContentTemplateRoot as RelativePanel).Children[1] as Rectangle).Visibility = Visibility.Collapsed;
}
(((WallPapersList.ContainerFromItem(e.ClickedItem) as GridViewItem).ContentTemplateRoot as RelativePanel).Children[1] as Rectangle).Visibility = Visibility.Visible;
//创建墙纸
_wall_paperUI = new WallPaperUI()
{
Editing = true, Height = 100, Width = 100, Image = null, X = 150, Y = 150
};
//MyCanvas.Invalidate();
CanvasDevice device = CanvasDevice.GetSharedDevice();
var img = await CanvasBitmap.LoadAsync(device, new Uri(e.ClickedItem.ToString()));
if (img != null)
{
if (_wallpapers != null)
{
(_wall_paperUI as WallPaperUI).Width = img.Size.Width;
(_wall_paperUI as WallPaperUI).Height = img.Size.Height;
(_wall_paperUI as WallPaperUI).Image = img;
MyCanvas.Invalidate();
}
}
;
}
private async void Current_SizeChanged(object sender, Windows.UI.Core.WindowSizeChangedEventArgs e)
{
var height = ApplicationView.GetForCurrentView().VisibleBounds.Height;
var width = ApplicationView.GetForCurrentView().VisibleBounds.Width;
if (UWPPlatformTool.IsMobile)
{
border.Width = this.Width = width;
border.Height = this.Height = height;
}
else
{
border.Width = width;
border.Height = height;
this.Height = height * 0.8;
this.Width = this.Height * 1.6;
}
SetCanvas();
MyCanvas.Invalidate();
await Task.Delay(10);
SetCanvas();
MyCanvas.Invalidate();
}
/// <summary>
/// 涂鸦撤销
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SymbolIcon_Tapped(object sender, TappedRoutedEventArgs e)
{
if (_doodleUIs != null && _doodleUIs.Count > 0)
{
_doodleUIs.Pop(); //删除最近一次涂鸦 立即重绘
MyCanvas.Invalidate();
}
}
/// <summary>
/// 操作画布进行时
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MyCanvas_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
if (_current_editing_doodleUI != null)
{
_current_editing_doodleUI.Points.Add(e.Position);
MyCanvas.Invalidate();
}
}
private void SetCanvas()
{
var w = MainWorkSapce.ActualWidth - 40; //
var h = MainWorkSapce.ActualHeight - 40; //
if (w <= 0 || h <= 0)
{
return;
}
if (_size_mode == 0) //1:1
{
var l = w > h ? h : w;
MyCanvas.Width = MyCanvas.Height = l;
}
else if (_size_mode == 1) //4:3
{
if (w <= h)
{
MyCanvas.Width = w;
MyCanvas.Height = MyCanvas.Width * 3 / 4;
}
else
{
if (w / h <= (double)4 / 3)
{
MyCanvas.Width = w;
MyCanvas.Height = MyCanvas.Width * 3 / 4;
}
else
{
MyCanvas.Height = h;
MyCanvas.Width = MyCanvas.Height * 4 / 3;
}
}
}
else //3:4
{
if (h <= w)
{
MyCanvas.Height = h;
MyCanvas.Width = MyCanvas.Height * 3 / 4;
}
else
{
if (h / w <= (double)4 / 3)
{
MyCanvas.Height = h;
MyCanvas.Width = MyCanvas.Height * 3 / 4;
}
else
{
MyCanvas.Width = w;
MyCanvas.Height = MyCanvas.Width * 4 / 3;
}
}
}
MyCanvas.Invalidate();
}
/// <summary>
/// 操作画布结束
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MyCanvas_ManipulationCompleted(object sender, ManipulationCompletedRoutedEventArgs e)
{
if (_current_editing_doodleUI != null)
{
_doodleUIs.Push(_current_editing_doodleUI);
_current_editing_doodleUI = null;
MyCanvas.Invalidate();
}
}
public async void Show(Uri uri)
{
try
{
Show();
//WaitLoading.IsActive = true;
CanvasDevice cd = CanvasDevice.GetSharedDevice();
_image = await CanvasBitmap.LoadAsync(cd, uri, 96);
//WaitLoading.IsActive = false;
MyCanvas.Invalidate();
}
catch
{
}
}
public async void Show(StorageFile image)
{
try
{
Show();
CanvasDevice cd = CanvasDevice.GetSharedDevice();
var stream = await image.OpenAsync(FileAccessMode.Read);
_image = await CanvasBitmap.LoadAsync(cd, stream);
MyCanvas.Invalidate();
}
catch
{
}
}
/* private void MainCanvas_ManipulationStarted(object sender, ManipulationStartedRoutedEventArgs e)
* {
* if (MainCommandPanel.SelectedIndex == 4) //涂鸦状态
* {
* if (_current_editing_doodleUI == null)
* {
* _current_editing_doodleUI = new DoodleUI() { DrawingColor = _pen_color, DrawingSize = _pen_size };
* _current_editing_doodleUI.InitImageBrush(); //可能是图片图片画刷 需要提前初始化
* }
* return;
* }
* if (_tagsUIs != null)
* {
* foreach (var tag in _tagsUIs)
* {
* if ((tag as TagUI).Region.Contains(e.Position))
* {
* _current_tag = tag;
* _pre_manipulation_position = e.Position;
* _manipulation_type = 2;
* break;
* }
* }
* }
* if (MainCommandPanel.SelectedIndex == 0) //可能是剪切状态
* {
* if (_cropUI != null) //确实是剪切状态
* {
* if ((_cropUI as CropUI).Region.Contains(e.Position)) //移动剪切对象
* {
* _manipulation_type = 0;
* _pre_manipulation_position = e.Position;
* }
* if ((_cropUI as CropUI).RightBottomRegion.Contains(e.Position)) //缩放剪切区域
* {
* _manipulation_type = 1;
* _pre_manipulation_position = e.Position;
* }
*
* }
* return;
* }*/
/// <summary>
/// 操作画布开始
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MyCanvas_ManipulationStarted(object sender, ManipulationStartedRoutedEventArgs e)
{
if (_wall_paperUI != null)
{
if ((_wall_paperUI as WallPaperUI).Region.Contains(e.Position)) //移动墙纸
{
_manipulation_type = 3;
_pre_manipulation_position = e.Position;
(_wall_paperUI as WallPaperUI).Editing = true;
}
if ((_wall_paperUI as WallPaperUI).RightBottomRegion.Contains(e.Position) && (_wall_paperUI as WallPaperUI).Editing) //缩放墙纸
{
_manipulation_type = 4;
_pre_manipulation_position = e.Position;
}
MyCanvas.Invalidate();
}
return;
}
/// <summary>
/// 操作画布进行时
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MyCanvas_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
if (_wall_paperUI != null && _pre_manipulation_position != null)
{
var deltaX = e.Position.X - _pre_manipulation_position.Value.X;
var deltaY = e.Position.Y - _pre_manipulation_position.Value.Y;
if (_manipulation_type == 3) //移动
{
(_wall_paperUI as WallPaperUI).X += deltaX;
(_wall_paperUI as WallPaperUI).Y += deltaY;
}
else if (_manipulation_type == 4) //缩放
{
(_wall_paperUI as WallPaperUI).Width += deltaX * 2;
(_wall_paperUI as WallPaperUI).SyncWH(); //只需要设置宽度 高度自动同步
}
_pre_manipulation_position = e.Position;
MyCanvas.Invalidate();
}
}
