forked from lxn/walk
/
tooltip.go
176 lines (130 loc) · 3.28 KB
/
tooltip.go
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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
// 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.
package walk
import (
"syscall"
"unsafe"
)
import (
"github.com/lxn/win"
)
func init() {
var err error
if globalToolTip, err = NewToolTip(); err != nil {
panic(err)
}
}
type ToolTip struct {
WindowBase
}
var globalToolTip *ToolTip
func NewToolTip() (*ToolTip, error) {
tt := new(ToolTip)
if err := InitWindow(
tt,
nil,
"tooltips_class32",
win.WS_POPUP|win.TTS_ALWAYSTIP,
win.WS_EX_TOPMOST); err != nil {
return nil, err
}
succeeded := false
defer func() {
if !succeeded {
tt.Dispose()
}
}()
win.SetWindowPos(tt.hWnd, win.HWND_TOPMOST, 0, 0, 0, 0, win.SWP_NOMOVE|win.SWP_NOSIZE|win.SWP_NOACTIVATE)
succeeded = true
return tt, nil
}
func (*ToolTip) LayoutFlags() LayoutFlags {
return 0
}
func (tt *ToolTip) SizeHint() Size {
return Size{0, 0}
}
func (tt *ToolTip) Title() string {
var gt win.TTGETTITLE
buf := make([]uint16, 100)
gt.DwSize = uint32(unsafe.Sizeof(gt))
gt.Cch = uint32(len(buf))
gt.PszTitle = &buf[0]
tt.SendMessage(win.TTM_GETTITLE, 0, uintptr(unsafe.Pointer(>)))
return syscall.UTF16ToString(buf)
}
func (tt *ToolTip) SetTitle(title string) error {
return tt.setTitle(title, win.TTI_NONE)
}
func (tt *ToolTip) SetInfoTitle(title string) error {
return tt.setTitle(title, win.TTI_INFO)
}
func (tt *ToolTip) SetWarningTitle(title string) error {
return tt.setTitle(title, win.TTI_WARNING)
}
func (tt *ToolTip) SetErrorTitle(title string) error {
return tt.setTitle(title, win.TTI_ERROR)
}
func (tt *ToolTip) setTitle(title string, icon uintptr) error {
if len(title) > 99 {
title = title[:99]
}
if win.FALSE == tt.SendMessage(win.TTM_SETTITLE, icon, uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(title)))) {
return newError("TTM_SETTITLE failed")
}
return nil
}
func (tt *ToolTip) AddTool(tool Widget) error {
hwnd := tool.Handle()
var ti win.TOOLINFO
ti.CbSize = uint32(unsafe.Sizeof(ti))
ti.Hwnd = hwnd
ti.UFlags = win.TTF_IDISHWND | win.TTF_SUBCLASS
ti.UId = uintptr(hwnd)
if win.FALSE == tt.SendMessage(win.TTM_ADDTOOL, 0, uintptr(unsafe.Pointer(&ti))) {
return newError("TTM_ADDTOOL failed")
}
return nil
}
func (tt *ToolTip) RemoveTool(tool Widget) error {
hwnd := tool.Handle()
var ti win.TOOLINFO
ti.CbSize = uint32(unsafe.Sizeof(ti))
ti.Hwnd = hwnd
ti.UId = uintptr(hwnd)
tt.SendMessage(win.TTM_DELTOOL, 0, uintptr(unsafe.Pointer(&ti)))
return nil
}
func (tt *ToolTip) Text(tool Widget) string {
ti := tt.toolInfo(tool)
if ti == nil {
return ""
}
return win.UTF16PtrToString(ti.LpszText)
}
func (tt *ToolTip) SetText(tool Widget, text string) error {
ti := tt.toolInfo(tool)
if ti == nil {
return newError("unknown tool")
}
if len(text) > 79 {
text = text[:79]
}
ti.LpszText = syscall.StringToUTF16Ptr(text)
tt.SendMessage(win.TTM_SETTOOLINFO, 0, uintptr(unsafe.Pointer(ti)))
return nil
}
func (tt *ToolTip) toolInfo(tool Widget) *win.TOOLINFO {
var ti win.TOOLINFO
var buf [80]uint16
hwnd := tool.Handle()
ti.CbSize = uint32(unsafe.Sizeof(ti))
ti.Hwnd = hwnd
ti.UId = uintptr(hwnd)
ti.LpszText = &buf[0]
if win.FALSE == tt.SendMessage(win.TTM_GETTOOLINFO, 0, uintptr(unsafe.Pointer(&ti))) {
return nil
}
return &ti
}