Class: JLDrill::Gtk::ProblemPane

Inherits:
Gtk::ScrolledWindow
  • Object
show all
Includes:
Context::Gtk::Widget
Defined in:
lib/jldrill/views/gtk/widgets/ProblemPane.rb

Overview

This is a scrolled window that shows information from a problem. There are two kinds of problem pane: the QuestionPane and the AnswerPane. The QuestionPane shows the question for the problem and the AnswerPane shows the answer

Direct Known Subclasses

AnswerPane, QuestionPane

Constant Summary collapse

NORMAL_COLOR = 
Gdk::Color.parse("#ffffc0")
DISPLAY_ONLY_COLOR = 
Gdk::Color.parse("#e0f0ff")
PREVIEW_COLOR = 
Gdk::Color.parse("#ffe0ff")
EXPIRED_COLOR = 
Gdk::Color.parse("#f07070")

Instance Attribute Summary collapse

Attributes included from Context::Gtk::Widget

#gtkWidgetMainWindow

Instance Method Summary collapse

Methods included from Context::Gtk::Widget

#addToThisWidget, #afterWidgetIsAdded, #afterWidgetIsRemoved, #expandWidgetHeight, #expandWidgetHeight?, #expandWidgetWidth, #expandWidgetWidth?, #gtkAddWidget, #gtkRemoveWidget, #isAMainWindow, #isInTests?, #removeFromThisWidget, #setupWidget, #widgetWasAddedTo, #widgetWasRemovedFrom

Constructor Details

#initialize(display) ⇒ ProblemPane

Returns a new instance of ProblemPane.



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 22

def initialize(display)
    super()
    @display = display
    setupWidget

    self.set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC)
    self.shadow_type = Gtk::SHADOW_IN
    @contents = Gtk::TextView.new
    @contents.wrap_mode = Gtk::TextTag::WRAP_WORD
    @contents.editable = false
    @contents.cursor_visible = false
    @contents.set_pixels_above_lines(5)
    normalMode
    self.add(@contents)
    @buffer = @contents.buffer
    createTags
    @images = []
end

Instance Attribute Details

#contents ⇒ Object (readonly)

Returns the value of attribute contents.



20
21
22
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 20

def contents
  @contents
end

Instance Method Details

#addImage(filename) ⇒ Object

Adds an image to the bottom of the pane



81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 81

def addImage(filename)
    filename = @display.expandWithSavePath(filename)
    image = Gtk::Image.new(filename)
    # inserting spaces on either end of the image centers it
    @buffer.insert(@buffer.end_iter," ", "image")
    if !image.pixbuf.nil?
        @buffer.insert(@buffer.end_iter, image.pixbuf)
        # This simply makes sure the image isn't garbage collected
        # because the pixbuf in the image isn't reference counted.
        @images.push(image)
    else
        @buffer.insert(@buffer.end_iter, filename + " not found.", 
                       "image")
    end
    @buffer.insert(@buffer.end_iter," ", "image")
end

#bufferSize ⇒ Object

Returns the height of the buffer in buffer coordinates. Note: This method must be called after all drawing has taken place. The easiest way to do this is to put the calculation into an Gtk.idle_add block.



130
131
132
133
134
135
136
137
138
139
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 130

def bufferSize
    # Allow the buffer to be drawn so that we get correct
    # coordinates
    iter = @buffer.end_iter
    y, height = @contents.get_line_yrange(iter)
    size = y + height
    windowType = Gtk::TextView::WINDOW_TEXT
    winx, winy = @contents.buffer_to_window_coords(windowType, 0, size)
    return winy
end

#clear(problem) ⇒ Object 



98
99
100
101
102
103
104
105
106
107
108
109
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 98

def clear(problem)
    if !problem.nil? && problem.preview?
        previewMode
    elsif !problem.nil? && problem.displayOnly?
        displayOnlyMode
    else
        normalMode
    end

    @buffer.text = ""
    @images = []
end

#createTags ⇒ Object 



57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 57

def createTags
    @buffer.create_tag("kanji", 
                       "size" => 36 * Pango::SCALE,
                       "justification" => Gtk::JUSTIFY_CENTER,
                       "family" => "Kochi Mincho")
    @buffer.create_tag("reading", 
                       "size" => 18 * Pango::SCALE,
                       "justification" => Gtk::JUSTIFY_CENTER,
                       "family" => "Kochi Mincho",
                       "foreground" => "blue")
    @buffer.create_tag("definitions", 
                       "size" => 16 * Pango::SCALE,
                       "justification" => Gtk::JUSTIFY_CENTER,
                       "family" => "Sans")
    @buffer.create_tag("hint", 
                       "size" => 14 * Pango::SCALE,
                       "justification" => Gtk::JUSTIFY_CENTER,
                       "family" => "Sans",
                       "foreground" => "red")
    @buffer.create_tag("image",
                       "justification" => Gtk::JUSTIFY_CENTER)
end

#displayOnlyMode ⇒ Object 



49
50
51
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 49

def displayOnlyMode
    @contents.modify_base(Gtk::STATE_NORMAL, DISPLAY_ONLY_COLOR)
end

#expiredMode ⇒ Object 



53
54
55
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 53

def expiredMode
    @contents.modify_base(Gtk::STATE_NORMAL, EXPIRED_COLOR)
end

#normalMode ⇒ Object 



41
42
43
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 41

def normalMode
    @contents.modify_base(Gtk::STATE_NORMAL, NORMAL_COLOR)
end

#previewMode ⇒ Object 



45
46
47
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 45

def previewMode
    @contents.modify_base(Gtk::STATE_NORMAL, PREVIEW_COLOR)
end

#receive(type, string) ⇒ Object 



115
116
117
118
119
120
121
122
123
124
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 115

def receive(type, string)
    if !string.nil? && !string.empty?
        if (string.start_with?("image:"))
            addImage(string[6..string.size])
        else
            @buffer.insert(@buffer.end_iter, string, type)
        end
        @buffer.insert(@buffer.end_iter, "\n", type)
    end
end

#showBusy(bool) ⇒ Object 



141
142
143
144
145
146
147
148
149
150
151
152
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 141

def showBusy(bool)
    # TextViews have a hidden subwindow that houses the cursor
    subwindow = @contents.get_window(Gtk::TextView::WINDOW_TEXT)
    if bool
        self.window.set_cursor(Gdk::Cursor.new(Gdk::Cursor::WATCH))
        subwindow.set_cursor(Gdk::Cursor.new(Gdk::Cursor::WATCH))
    else
        self.window.set_cursor(nil)
        subwindow.set_cursor(nil)
    end
    Gdk::flush()
end

#text ⇒ Object 



111
112
113
 
# File 'lib/jldrill/views/gtk/widgets/ProblemPane.rb', line 111

def text
    @buffer.text
end