71 lines
1.4 KiB
Go
71 lines
1.4 KiB
Go
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// +build windows
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package drop
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import (
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"errors"
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"unsafe"
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"golang.org/x/text/encoding/unicode"
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"opslag.de/schobers/geom"
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)
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/*
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#include <Windows.h>
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#include <stdint.h>
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void SetDragAndDropHook(void* window);
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*/
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import "C"
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var handler Dropper = nil
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var drops map[uint32]droppedFiles = map[uint32]droppedFiles{}
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type droppedFiles struct {
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X, Y int
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Files []string
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}
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//export droppedFilesPosition
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func droppedFilesPosition(id C.uint32_t, x, y C.INT) {
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files := drops[uint32(id)]
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files.X = int(x)
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files.Y = int(y)
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drops[uint32(id)] = files
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}
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//export droppedFilesFile
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func droppedFilesFile(id C.uint32_t, filePath *C.wchar_t, filePathLength C.UINT) {
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files := drops[uint32(id)]
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pathBytes := C.GoBytes(unsafe.Pointer(filePath), C.int(filePathLength)*C.sizeof_wchar_t)
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decoder := unicode.UTF16(unicode.LittleEndian, unicode.UseBOM).NewDecoder()
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path, err := decoder.Bytes(pathBytes)
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if err != nil {
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return
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}
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files.Files = append(files.Files, string(path))
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drops[uint32(id)] = files
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}
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//export droppedFilesDrop
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func droppedFilesDrop(id C.uint32_t) {
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h := handler
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if h == nil {
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return
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}
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drop, ok := drops[uint32(id)]
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if !ok {
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return
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}
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h.FilesDropped(geom.Pt(drop.X, drop.Y).ToF32(), drop.Files)
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}
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func Register(dropper Dropper) error {
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if handler != nil {
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return errors.New(`can only register single dropper`)
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}
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handler = dropper
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C.SetDragAndDropHook(unsafe.Pointer(dropper.WindowHandle()))
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return nil
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}
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