1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
// 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 (
"github.com/lxn/win"
)
type Label struct {
WidgetBase
textChangedPublisher EventPublisher
textColor Color
}
func NewLabel(parent Container) (*Label, error) {
return NewLabelWithStyle(parent, 0)
}
func NewLabelWithStyle(parent Container, style uint32) (*Label, error) {
l := new(Label)
if err := InitWidget(
l,
parent,
"STATIC",
win.WS_VISIBLE|win.SS_CENTERIMAGE|style,
0); err != nil {
return nil, err
}
l.SetBackground(nullBrushSingleton)
l.MustRegisterProperty("Text", NewProperty(
func() interface{} {
return l.Text()
},
func(v interface{}) error {
return l.setText(assertStringOr(v, ""))
},
l.textChangedPublisher.Event()))
return l, nil
}
func (*Label) LayoutFlags() LayoutFlags {
return GrowableVert | GrowableHorz
}
func (l *Label) MinSizeHint() Size {
return l.calculateTextSize()
}
func (l *Label) SizeHint() Size {
return l.MinSizeHint()
}
func (l *Label) Text() string {
return l.text()
}
func (l *Label) SetText(value string) error {
if value == l.Text() {
return nil
}
if err := l.setText(value); err != nil {
return err
}
return l.updateParentLayout()
}
func (l *Label) TextColor() Color {
return l.textColor
}
func (l *Label) SetTextColor(c Color) {
l.textColor = c
l.Invalidate()
}
func (l *Label) WndProc(hwnd win.HWND, msg uint32, wParam, lParam uintptr) uintptr {
switch msg {
case win.WM_NCHITTEST:
return win.HTCLIENT
case win.WM_SETTEXT:
l.textChangedPublisher.Publish()
case win.WM_SIZE, win.WM_SIZING:
l.Invalidate()
}
return l.WidgetBase.WndProc(hwnd, msg, wParam, lParam)
}
|
