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app: add support for system cursors

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Signed-off-by: pierre <pierre.curto@gmail.com>
This commit is contained in:
pierre
2020-12-02 16:50:56 +01:00
committed by Elias Naur
parent 951d45a2c6
commit 69cc2c795c
15 changed files with 297 additions and 18 deletions
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app/internal/window/os_darwin.go
+43
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@@ -13,6 +13,9 @@ __attribute__ ((visibility ("hidden"))) void gio_releaseDisplayLink(CFTypeRef dl
__attribute__ ((visibility ("hidden"))) int gio_startDisplayLink(CFTypeRef dl);
__attribute__ ((visibility ("hidden"))) int gio_stopDisplayLink(CFTypeRef dl);
__attribute__ ((visibility ("hidden"))) void gio_setDisplayLinkDisplay(CFTypeRef dl, uint64_t did);
__attribute__ ((visibility ("hidden"))) void gio_hideCursor();
__attribute__ ((visibility ("hidden"))) void gio_showCursor();
__attribute__ ((visibility ("hidden"))) void gio_setCursor(NSUInteger curID);
*/
import "C"
import (
@@ -22,6 +25,8 @@ import (
"time"
"unicode/utf16"
"unsafe"
"gioui.org/io/pointer"
)
// displayLink is the state for a display link (CVDisplayLinkRef on macOS,
@@ -169,3 +174,41 @@ func gio_onFrameCallback(dl C.CFTypeRef) {
}
}
}
// windowSetCursor updates the cursor from the current one to a new one
// and returns the new one.
func windowSetCursor(from, to pointer.CursorName) pointer.CursorName {
if from == to {
return to
}
var curID int
switch to {
default:
to = pointer.CursorDefault
fallthrough
case pointer.CursorDefault:
curID = 1
case pointer.CursorText:
curID = 2
case pointer.CursorPointer:
curID = 3
case pointer.CursorCrossHair:
curID = 4
case pointer.CursorColResize:
curID = 5
case pointer.CursorRowResize:
curID = 6
case pointer.CursorNone:
runOnMain(func() {
C.gio_hideCursor()
})
return to
}
runOnMain(func() {
if from == pointer.CursorNone {
C.gio_showCursor()
}
C.gio_setCursor(C.NSUInteger(curID))
})
return to
}