mirror of
https://github.com/wailsapp/wails.git
synced 2025-05-04 08:31:47 +08:00
135 lines
3.3 KiB
Go
135 lines
3.3 KiB
Go
//go:build windows
|
|
|
|
package w32
|
|
|
|
import (
|
|
"github.com/wailsapp/go-webview2/pkg/combridge"
|
|
"golang.org/x/sys/windows"
|
|
)
|
|
|
|
var (
|
|
DROPEFFECT_NONE DWORD = 0
|
|
DROPEFFECT_COPY DWORD = 1
|
|
DROPEFFECT_MOVE DWORD = 2
|
|
DROPEFFECT_LINK DWORD = 4
|
|
)
|
|
|
|
const (
|
|
DRAGDROP_E_ALREADYREGISTERED = 0x80040101
|
|
DRAGDROP_E_INVALIDHWND = 0x80040102
|
|
)
|
|
|
|
func _NOP(_ uintptr) uintptr {
|
|
return uintptr(windows.S_FALSE)
|
|
}
|
|
|
|
func init() {
|
|
combridge.RegisterVTable[combridge.IUnknown, iDropTarget](
|
|
"{00000122-0000-0000-C000-000000000046}",
|
|
_iDropTargetDragEnter,
|
|
_iDropTargetDragOver,
|
|
_iDropTargetDragLeave,
|
|
_iDropTargetDrop,
|
|
)
|
|
}
|
|
|
|
func _iDropTargetDragEnter(this uintptr, dataObject *IDataObject, grfKeyState DWORD, point POINT, pdfEffect *DWORD) uintptr {
|
|
return combridge.Resolve[iDropTarget](this).DragEnter(dataObject, grfKeyState, point, pdfEffect)
|
|
}
|
|
|
|
func _iDropTargetDragOver(this uintptr, grfKeyState DWORD, point POINT, pdfEffect *DWORD) uintptr {
|
|
return combridge.Resolve[iDropTarget](this).DragOver(grfKeyState, point, pdfEffect)
|
|
}
|
|
|
|
func _iDropTargetDragLeave(this uintptr) uintptr {
|
|
return combridge.Resolve[iDropTarget](this).DragLeave()
|
|
}
|
|
|
|
func _iDropTargetDrop(this uintptr, dataObject *IDataObject, grfKeyState DWORD, point POINT, pdfEffect *DWORD) uintptr {
|
|
return combridge.Resolve[iDropTarget](this).Drop(dataObject, grfKeyState, point, pdfEffect)
|
|
}
|
|
|
|
type iDropTarget interface {
|
|
combridge.IUnknown
|
|
|
|
DragEnter(dataObject *IDataObject, grfKeyState DWORD, point POINT, pdfEffect *DWORD) uintptr
|
|
DragOver(grfKeyState DWORD, point POINT, pdfEffect *DWORD) uintptr
|
|
DragLeave() uintptr
|
|
Drop(dataObject *IDataObject, grfKeyState DWORD, point POINT, pdfEffect *DWORD) uintptr
|
|
}
|
|
|
|
var _ iDropTarget = &DropTarget{}
|
|
|
|
type DropTarget struct {
|
|
combridge.IUnknownImpl
|
|
OnEnterEffect DWORD
|
|
OnOverEffect DWORD
|
|
OnEnter func()
|
|
OnLeave func()
|
|
OnOver func()
|
|
OnDrop func(filenames []string)
|
|
}
|
|
|
|
func NewDropTarget() *DropTarget {
|
|
result := &DropTarget{
|
|
OnEnterEffect: DROPEFFECT_COPY,
|
|
OnOverEffect: DROPEFFECT_COPY,
|
|
}
|
|
return result
|
|
}
|
|
|
|
func (d *DropTarget) DragEnter(dataObject *IDataObject, grfKeyState DWORD, point POINT, pdfEffect *DWORD) uintptr {
|
|
*pdfEffect = d.OnEnterEffect
|
|
if d.OnEnter != nil {
|
|
d.OnEnter()
|
|
}
|
|
return uintptr(windows.S_OK)
|
|
}
|
|
|
|
func (d *DropTarget) DragOver(grfKeyState DWORD, point POINT, pdfEffect *DWORD) uintptr {
|
|
*pdfEffect = d.OnOverEffect
|
|
if d.OnOver != nil {
|
|
d.OnOver()
|
|
}
|
|
return uintptr(windows.S_OK)
|
|
}
|
|
|
|
func (d *DropTarget) DragLeave() uintptr {
|
|
if d.OnLeave != nil {
|
|
d.OnLeave()
|
|
}
|
|
return uintptr(windows.S_OK)
|
|
}
|
|
|
|
func (d *DropTarget) Drop(dataObject *IDataObject, grfKeyState DWORD, point POINT, pdfEffect *DWORD) uintptr {
|
|
|
|
if d.OnDrop == nil {
|
|
return uintptr(windows.S_OK)
|
|
}
|
|
|
|
// Extract filenames from dataObject
|
|
var filenames []string
|
|
var formatETC = FORMATETC{
|
|
CfFormat: CF_HDROP,
|
|
Tymed: TYMED_HGLOBAL,
|
|
}
|
|
|
|
var stgMedium STGMEDIUM
|
|
|
|
err := dataObject.GetData(&formatETC, &stgMedium)
|
|
if err != nil && err != windows.ERROR_SUCCESS {
|
|
return uintptr(windows.S_FALSE)
|
|
}
|
|
defer stgMedium.Release()
|
|
hDrop := stgMedium.Union
|
|
_, numFiles := DragQueryFile(hDrop, 0xFFFFFFFF)
|
|
for i := uint(0); i < numFiles; i++ {
|
|
filename, _ := DragQueryFile(hDrop, i)
|
|
filenames = append(filenames, filename)
|
|
}
|
|
|
|
d.OnDrop(filenames)
|
|
|
|
return uintptr(windows.S_OK)
|
|
}
|