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cursor.go
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// Copyright 2011 The Walk Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package walk
import . "github.com/lxn/go-winapi"
import "image"
type Cursor interface {
Dispose()
handle() HCURSOR
}
type stockCursor struct {
hCursor HCURSOR
}
func (sc stockCursor) Dispose() {
// nop
}
func (sc stockCursor) handle() HCURSOR {
return sc.hCursor
}
func CursorArrow() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_ARROW))}
}
func CursorIBeam() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_IBEAM))}
}
func CursorWait() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_WAIT))}
}
func CursorCross() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_CROSS))}
}
func CursorUpArrow() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_UPARROW))}
}
func CursorSizeNWSE() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_SIZENWSE))}
}
func CursorSizeNESW() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_SIZENESW))}
}
func CursorSizeWE() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_SIZEWE))}
}
func CursorSizeNS() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_SIZENS))}
}
func CursorSizeAll() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_SIZEALL))}
}
func CursorNo() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_NO))}
}
func CursorHand() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_HAND))}
}
func CursorAppStarting() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_APPSTARTING))}
}
func CursorHelp() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_HELP))}
}
func CursorIcon() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_ICON))}
}
func CursorSize() Cursor {
return stockCursor{LoadCursor(0, MAKEINTRESOURCE(IDC_SIZE))}
}
type customCursor struct {
hCursor HCURSOR
}
func NewCursorFromImage(im image.Image, hotspot image.Point) (Cursor, error) {
i, err := createAlphaCursorOrIconFromImage(im, hotspot, false)
if err != nil {
return nil, err
}
return customCursor{HCURSOR(i)}, nil
}
func (cc customCursor) Dispose() {
DestroyIcon(HICON(cc.hCursor))
}
func (cc customCursor) handle() HCURSOR {
return cc.hCursor
}