Skip to content

Add image placement tool to AvalonDraw #348

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
wieslawsoltes merged 1 commit into from
Jul 18, 2025
Merged

Add image placement tool to AvalonDraw #348

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions samples/AvalonDraw/MainWindow.axaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,7 @@
<MenuItem Header="Open..." Click="OpenMenuItem_Click" InputGesture="Ctrl+O"/>
<MenuItem Header="Save..." Click="SaveMenuItem_Click" InputGesture="Ctrl+S"/>
<MenuItem Header="Export Element..." Click="ExportElementMenuItem_Click" InputGesture="Ctrl+E"/>
<MenuItem Header="Place Image..." Click="PlaceImageMenuItem_Click"/>
<MenuItem Header="Preview" Click="PreviewMenuItem_Click" InputGesture="F5"/>
<MenuItem Header="Edit Text" Click="EditTextMenuItem_Click" InputGesture="Ctrl+T"/>
</MenuItem>
Expand Down
35 changes: 34 additions & 1 deletion samples/AvalonDraw/MainWindow.axaml.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -421,6 +421,39 @@ private async void ExportElementMenuItem_Click(object? sender, RoutedEventArgs e
SK.SKColorType.Rgba8888, SK.SKAlphaType.Premul, SvgView.SkSvg.Settings.Srgb);
}

private async void PlaceImageMenuItem_Click(object? sender, RoutedEventArgs e)
{
if (_document is null)
return;
var dialog = new OpenFileDialog
{
Filters = new()
{
new FileDialogFilter { Name = "Images", Extensions = { "png", "jpg", "jpeg", "bmp" } },
new FileDialogFilter { Name = "All", Extensions = { "*" } }
}
};
var result = await dialog.ShowAsync(this);
var file = result?.FirstOrDefault();
if (string.IsNullOrEmpty(file))
return;
byte[] data;
try
{
data = await File.ReadAllBytesAsync(file);
}
catch
{
return;
}
var ext = Path.GetExtension(file).Trim('.').ToLowerInvariant();
if (ext == "jpg")
ext = "jpeg";
var href = $"data:image/{ext};base64,{Convert.ToBase64String(data)}";
_toolService.ImageHref = href;
_toolService.SetTool(Tool.Image);
}

private void Window_OnDragOver(object? sender, DragEventArgs e)
{
if (e.Data.Contains(DataFormats.FileNames))
Expand Down Expand Up @@ -557,7 +590,7 @@ private async void SvgView_OnPointerPressed(object? sender, PointerPressedEventA

if ((_toolService.CurrentTool == Tool.Line || _toolService.CurrentTool == Tool.Rect || _toolService.CurrentTool == Tool.Circle || _toolService.CurrentTool == Tool.Ellipse ||
_toolService.CurrentTool == Tool.Text || _toolService.CurrentTool == Tool.TextPath || _toolService.CurrentTool == Tool.TextArea ||
_toolService.CurrentTool == Tool.Symbol ||
_toolService.CurrentTool == Tool.Symbol || _toolService.CurrentTool == Tool.Image ||
_toolService.CurrentTool == Tool.PathLine || _toolService.CurrentTool == Tool.PathCubic || _toolService.CurrentTool == Tool.PathQuadratic || _toolService.CurrentTool == Tool.PathArc || _toolService.CurrentTool == Tool.PathMove) &&
e.GetCurrentPoint(SvgView).Properties.IsLeftButtonPressed)
{
Expand Down
43 changes: 39 additions & 4 deletions samples/AvalonDraw/Services/ToolService.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,8 @@ public enum Tool
PathQuadratic,
PathArc,
PathMove,
Symbol
Symbol,
Image
}

public Tool CurrentTool { get; private set; } = Tool.Select;
Expand All @@ -46,6 +47,7 @@ public void SetTool(Tool tool)

public string? SymbolId { get; set; }
public string? ReferenceId { get; set; }
public string? ImageHref { get; set; }

public SvgVisualElement? CreateElement(Tool tool, SvgElement parent, ShimSkiaSharp.SKPoint start)
{
Expand Down Expand Up @@ -130,6 +132,14 @@ public void SetTool(Tool tool)
X = new SvgUnit(SvgUnitType.User, start.X),
Y = new SvgUnit(SvgUnitType.User, start.Y)
},
Tool.Image when !string.IsNullOrEmpty(ImageHref) => new SvgImage
{
X = new SvgUnit(SvgUnitType.User, start.X),
Y = new SvgUnit(SvgUnitType.User, start.Y),
Width = new SvgUnit(SvgUnitType.User, 0),
Height = new SvgUnit(SvgUnitType.User, 0),
Href = ImageHref
},
_ => null!
};
}
Expand Down Expand Up @@ -179,20 +189,42 @@ public void UpdateElement(SvgVisualElement element, Tool tool, ShimSkiaSharp.SKP
var h = Math.Abs(current.Y - start.Y);
if (snapToGrid)
{
x = snap(x); y = snap(y); w = snap(w); h = snap(h);
x = snap(x);
y = snap(y);
w = snap(w);
h = snap(h);
}
r.X = new SvgUnit(r.X.Type, x);
r.Y = new SvgUnit(r.Y.Type, y);
r.Width = new SvgUnit(r.Width.Type, w);
r.Height = new SvgUnit(r.Height.Type, h);
break;
case Tool.Image when element is SvgImage img:
var ix = Math.Min(start.X, current.X);
var iy = Math.Min(start.Y, current.Y);
var iw = Math.Abs(current.X - start.X);
var ih = Math.Abs(current.Y - start.Y);
if (snapToGrid)
{
ix = snap(ix);
iy = snap(iy);
iw = snap(iw);
ih = snap(ih);
}
img.X = new SvgUnit(img.X.Type, ix);
img.Y = new SvgUnit(img.Y.Type, iy);
img.Width = new SvgUnit(img.Width.Type, iw);
img.Height = new SvgUnit(img.Height.Type, ih);
break;
case Tool.Circle when element is SvgCircle c:
var cx = (start.X + current.X) / 2f;
var cy = (start.Y + current.Y) / 2f;
var rv = Math.Max(Math.Abs(current.X - start.X), Math.Abs(current.Y - start.Y)) / 2f;
if (snapToGrid)
{
cx = snap(cx); cy = snap(cy); rv = snap(rv);
cx = snap(cx);
cy = snap(cy);
rv = snap(rv);
}
c.CenterX = new SvgUnit(c.CenterX.Type, cx);
c.CenterY = new SvgUnit(c.CenterY.Type, cy);
Expand All @@ -205,7 +237,10 @@ public void UpdateElement(SvgVisualElement element, Tool tool, ShimSkiaSharp.SKP
var ry = Math.Abs(current.Y - start.Y) / 2f;
if (snapToGrid)
{
ecx = snap(ecx); ecy = snap(ecy); rx = snap(rx); ry = snap(ry);
ecx = snap(ecx);
ecy = snap(ecy);
rx = snap(rx);
ry = snap(ry);
}
el.CenterX = new SvgUnit(el.CenterX.Type, ecx);
el.CenterY = new SvgUnit(el.CenterY.Type, ecy);
Expand Down
Loading