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// Copyright 2010 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.
// +build windows
package walk
import (
"syscall"
"unsafe"
)
import (
"github.com/lxn/win"
)
type TextEdit struct {
WidgetBase
readOnlyChangedPublisher EventPublisher
textChangedPublisher EventPublisher
textColor Color
}
func NewTextEdit(parent Container) (*TextEdit, error) {
return NewTextEditWithStyle(parent, 0)
}
func NewTextEditWithStyle(parent Container, style uint32) (*TextEdit, error) {
te := new(TextEdit)
if err := InitWidget(
te,
parent,
"EDIT",
win.WS_TABSTOP|win.WS_VISIBLE|win.ES_MULTILINE|win.ES_WANTRETURN|style,
win.WS_EX_CLIENTEDGE); err != nil {
return nil, err
}
te.GraphicsEffects().Add(InteractionEffect)
te.GraphicsEffects().Add(FocusEffect)
te.MustRegisterProperty("ReadOnly", NewProperty(
func() interface{} {
return te.ReadOnly()
},
func(v interface{}) error {
return te.SetReadOnly(v.(bool))
},
te.readOnlyChangedPublisher.Event()))
te.MustRegisterProperty("Text", NewProperty(
func() interface{} {
return te.Text()
},
func(v interface{}) error {
return te.SetText(assertStringOr(v, ""))
},
te.textChangedPublisher.Event()))
return te, nil
}
func (*TextEdit) LayoutFlags() LayoutFlags {
return ShrinkableHorz | ShrinkableVert | GrowableHorz | GrowableVert | GreedyHorz | GreedyVert
}
func (te *TextEdit) MinSizeHint() Size {
return te.dialogBaseUnitsToPixels(Size{20, 12})
}
func (te *TextEdit) SizeHint() Size {
return Size{100, 100}
}
func (te *TextEdit) Text() string {
return te.text()
}
func (te *TextEdit) TextLength() int {
return int(te.SendMessage(win.WM_GETTEXTLENGTH, 0, 0))
}
func (te *TextEdit) SetText(value string) (err error) {
if value == te.Text() {
return nil
}
err = te.setText(value)
te.textChangedPublisher.Publish()
return
}
func (te *TextEdit) TextAlignment() Alignment1D {
switch win.GetWindowLong(te.hWnd, win.GWL_STYLE) & (win.ES_LEFT | win.ES_CENTER | win.ES_RIGHT) {
case win.ES_CENTER:
return AlignCenter
case win.ES_RIGHT:
return AlignFar
}
return AlignNear
}
func (te *TextEdit) SetTextAlignment(alignment Alignment1D) error {
if alignment == AlignDefault {
alignment = AlignNear
}
var bit uint32
switch alignment {
case AlignCenter:
bit = win.ES_CENTER
case AlignFar:
bit = win.ES_RIGHT
default:
bit = win.ES_LEFT
}
return te.ensureStyleBits(bit, true)
}
func (te *TextEdit) MaxLength() int {
return int(te.SendMessage(win.EM_GETLIMITTEXT, 0, 0))
}
func (te *TextEdit) SetMaxLength(value int) {
te.SendMessage(win.EM_SETLIMITTEXT, uintptr(value), 0)
}
func (te *TextEdit) ScrollToCaret() {
te.SendMessage(win.EM_SCROLLCARET, 0, 0)
}
func (te *TextEdit) TextSelection() (start, end int) {
te.SendMessage(win.EM_GETSEL, uintptr(unsafe.Pointer(&start)), uintptr(unsafe.Pointer(&end)))
return
}
func (te *TextEdit) SetTextSelection(start, end int) {
te.SendMessage(win.EM_SETSEL, uintptr(start), uintptr(end))
}
func (te *TextEdit) ReplaceSelectedText(text string, canUndo bool) {
te.SendMessage(win.EM_REPLACESEL,
uintptr(win.BoolToBOOL(canUndo)),
uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(text))))
}
func (te *TextEdit) AppendText(value string) {
s, e := te.TextSelection()
l := te.TextLength()
te.SetTextSelection(l, l)
te.ReplaceSelectedText(value, false)
te.SetTextSelection(s, e)
}
func (te *TextEdit) ReadOnly() bool {
return te.hasStyleBits(win.ES_READONLY)
}
func (te *TextEdit) SetReadOnly(readOnly bool) error {
if 0 == te.SendMessage(win.EM_SETREADONLY, uintptr(win.BoolToBOOL(readOnly)), 0) {
return newError("SendMessage(EM_SETREADONLY)")
}
te.readOnlyChangedPublisher.Publish()
return nil
}
func (te *TextEdit) TextChanged() *Event {
return te.textChangedPublisher.Event()
}
func (te *TextEdit) TextColor() Color {
return te.textColor
}
func (te *TextEdit) SetTextColor(c Color) {
te.textColor = c
te.Invalidate()
}
func (te *TextEdit) WndProc(hwnd win.HWND, msg uint32, wParam, lParam uintptr) uintptr {
switch msg {
case win.WM_COMMAND:
switch win.HIWORD(uint32(wParam)) {
case win.EN_CHANGE:
te.textChangedPublisher.Publish()
}
case win.WM_GETDLGCODE:
if wParam == win.VK_RETURN {
return win.DLGC_WANTALLKEYS
}
return win.DLGC_HASSETSEL | win.DLGC_WANTARROWS | win.DLGC_WANTCHARS
case win.WM_KEYDOWN:
if Key(wParam) == KeyA && ControlDown() {
te.SetTextSelection(0, -1)
}
}
return te.WidgetBase.WndProc(hwnd, msg, wParam, lParam)
}
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