Class: Tk::RbWidget::BalloonHelp

Inherits:
TkLabel
  • Object
show all
Defined in:
sample/tkballoonhelp.rb,
sample/tkballoonhelp.rb

Constant Summary collapse

DEFAULT_FOREGROUND =
'black'
DEFAULT_BACKGROUND =
'white'
DEFAULT_INTERVAL =
750

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent = nil, keys = {}) ⇒ BalloonHelp

Returns a new instance of BalloonHelp.


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
# File 'sample/tkballoonhelp.rb', line 47

def initialize(parent=nil, keys={})
  @parent = parent || Tk.root

  @frame = TkToplevel.new(@parent)
  @frame.withdraw
  @frame.overrideredirect(true)
  @frame.transient(TkWinfo.toplevel(@parent))
  @epath = @frame.path

  if keys
    keys = _symbolkey2str(keys)
  else
    keys = {}
  end

  @command = keys.delete('command')

  @interval = keys.delete('interval'){DEFAULT_INTERVAL}
  _balloon_binding(@interval)

  # @label = TkLabel.new(@frame, 'background'=>'bisque').pack
  @label = TkLabel.new(@frame,
                       'foreground'=>DEFAULT_FOREGROUND,
                       'background'=>DEFAULT_BACKGROUND).pack
  @label.configure(_symbolkey2str(keys)) unless keys.empty?
  @path = @label
end

Class Method Details

.interval(val) ⇒ Object


28
29
30
# File 'sample/tkballoonhelp.rb', line 28

def @timer.interval(val)
  @sleep_time = val
end

Instance Method Details

#command(cmd = Proc.new) ⇒ Object


87
88
89
90
# File 'sample/tkballoonhelp.rb', line 87

def command(cmd = Proc.new)
  @command = cmd
  self
end

#destroyObject


136
137
138
# File 'sample/tkballoonhelp.rb', line 136

def destroy
  @frame.destroy
end

#epathObject


75
76
77
# File 'sample/tkballoonhelp.rb', line 75

def epath
  @epath
end

#eraseObject


127
128
129
130
131
132
133
134
# File 'sample/tkballoonhelp.rb', line 127

def erase
  begin
    @parent.configure('cursor', @org_cursor)
  rescue
    @parent.cursor(@org_cursor)
  end
  @frame.withdraw
end

#interval(val) ⇒ Object


79
80
81
82
83
84
85
# File 'sample/tkballoonhelp.rb', line 79

def interval(val)
  if val
    @timer.interval(val)
  else
    @interval
  end
end

#showObject


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
# File 'sample/tkballoonhelp.rb', line 92

def show
  x = TkWinfo.pointerx(@parent)
  y = TkWinfo.pointery(@parent)
  @frame.geometry("+#{x+1}+#{y+1}")

  if @command
    case @command.arity
    when 0
      @command.call
    when 2
      @command.call(x - TkWinfo.rootx(@parent), y - TkWinfo.rooty(@parent))
    when 3
      @command.call(x - TkWinfo.rootx(@parent), y - TkWinfo.rooty(@parent),
                    self)
    else
      @command.call(x - TkWinfo.rootx(@parent), y - TkWinfo.rooty(@parent),
                    self, @parent)
    end
  end

  @frame.deiconify
  @frame.raise

  begin
    @org_cursor = @parent.cget('cursor')
  rescue
    @org_cursor = @parent['cursor']
  end
  begin
    @parent.configure('cursor', 'crosshair')
  rescue
    @parent.cursor('crosshair')
  end
end