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events.go
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89 lines (72 loc) · 2.69 KB
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package darwin
import (
"unsafe"
"github.com/ebitengine/purego"
)
func EventLocationInWindow(event NSEvent) (float64, float64) {
var loc NSPoint
var locationInWindow func(receiver uintptr, selector Selector) NSPoint
purego.RegisterLibFunc(&locationInWindow, libobjc, "objc_msgSend")
loc = locationInWindow(uintptr(event.Ptr), Sel_locationInWindow)
return loc.X, loc.Y
}
func EventScrollingDeltaX(event NSEvent) float64 {
return Objc_sendMsg[float64](uintptr(event.Ptr), Sel_scrollingDeltaX)
}
func EventScrollingDeltaY(event NSEvent) float64 {
return Objc_sendMsg[float64](uintptr(event.Ptr), Sel_scrollingDeltaY)
}
func EventButtonNumber(event NSEvent) int {
return int(Objc_sendMsg[int64](uintptr(event.Ptr), Sel_buttonNumber))
}
func EventClickCount(event NSEvent) int {
return int(Objc_sendMsg[int64](uintptr(event.Ptr), Sel_clickCount))
}
func EventKeyCode(event NSEvent) int {
return int(Objc_sendMsg[uint16](uintptr(event.Ptr), Sel_keyCode))
}
func EventModifierFlags(event NSEvent) uintptr {
return Objc_sendMsg[uintptr](uintptr(event.Ptr), Sel_modifierFlags)
}
func EventCharacters(event NSEvent) string {
nsString := Objc_sendMsg[uintptr](uintptr(event.Ptr), Sel_characters)
return (NSString{Object{unsafe.Pointer(nsString)}}).String()
}
// EventFilePathsFromPasteboard extracts file paths from a pasteboard object.
func EventFilePathsFromPasteboard(pasteboard uintptr) []string {
// The pasteboard contains an array of items. For file drops, it's typically
// an array of NSURL objects represented as strings.
array := Objc_sendMsg[uintptr](pasteboard, Sel_getUid("propertyListForType:"), NSPasteboardTypeFileURL)
if array == 0 {
return nil
}
return eventFilePaths(Object{unsafe.Pointer(array)})
}
// eventFilePaths is a helper to convert an NSArray of NSStrings into a Go slice.
func eventFilePaths(array Object) []string {
count := Objc_sendMsg[uintptr](uintptr(array.Ptr), Sel_count)
if count == 0 {
return nil
}
paths := make([]string, count)
for i := uintptr(0); i < count; i++ {
path := Objc_sendMsg[uintptr](uintptr(array.Ptr), Sel_objectAtIndex, i)
paths[i] = (NSString{Object{unsafe.Pointer(path)}}).String()
}
return paths
}
func EventMagnification(event NSEvent) float64 {
return Objc_sendMsg[float64](uintptr(event.Ptr), Sel_magnification)
}
func EventRotation(event NSEvent) float64 {
return Objc_sendMsg[float64](uintptr(event.Ptr), Sel_rotation)
}
func EventPhase(event NSEvent) uintptr {
return Objc_sendMsg[uintptr](uintptr(event.Ptr), Sel_phase)
}
func EventTranslationX(event NSEvent) float64 {
return Objc_sendMsg[float64](uintptr(event.Ptr), Sel_deltaX)
}
func EventTranslationY(event NSEvent) float64 {
return Objc_sendMsg[float64](uintptr(event.Ptr), Sel_deltaY)
}