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Support custom cursors in the web backend #203

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Merged
treeform merged 1 commit into from
Oct 28, 2026
Merged

Support custom cursors in the web backend #203

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21 changes: 18 additions & 3 deletions src/windy/platforms/emscripten/platform.nim
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
import
std/[tables, strutils, unicode, times],
std/[base64, tables, strutils, unicode, times],
../../common, ../../internal, vmath, pixie

# include for EMSCRIPTEN_KEEPALIVE
Expand Down Expand Up @@ -395,6 +395,7 @@ proc cursor*(window: Window): Cursor =
window.state.cursor

proc `cursor=`*(window: Window, cursor: Cursor) =
## Sets the cursor displayed over the canvas.
window.state.cursor = cursor
case cursor.kind:
of ArrowCursor:
Expand Down Expand Up @@ -426,8 +427,22 @@ proc `cursor=`*(window: Window, cursor: Cursor) =
of WaitCursor:
set_cursor("wait")
of CustomCursor:
# TODO base64 encode Image?
set_cursor("auto")
if cursor.image == nil:
set_cursor("auto")
else:
let
data =
try:
base64.encode(cursor.image.encodeImage(PngFormat))
except PixieError as error:
raise newException(
WindyError,
"Unable to encode cursor image: " & error.msg,
error
)
value = "url(\"data:image/png;base64," & data & "\") " &
$cursor.hotspot.x & " " & $cursor.hotspot.y & ", crosshair"
set_cursor(value.cstring)

# Style functions
proc style*(window: Window): WindowStyle =
Expand Down
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