Class: PiecesModel

Inherits:
Qt::AbstractListModel
  • Object
show all
Defined in:
ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb

Overview

** ** Copyright © 2004-2005 Trolltech AS. All rights reserved. ** ** This file is part of the example classes of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of ** this file. Please review the following information to ensure GNU ** General Public Licensing requirements will be met: ** www.trolltech.com/products/qt/opensource.html ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** www.trolltech.com/products/qt/licensing.html or contact the ** sales department at [email protected]. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. **

** Translated to QtRuby by Richard Dale

Constant Summary collapse

RAND_MAX = 
2147483647

Instance Method Summary collapse

Constructor Details

#initialize(parent) ⇒ PiecesModel

Returns a new instance of PiecesModel.



30
31
32
33
34
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 30

def initialize(parent)
    super(parent)
	@locations = []
	@pixmaps = []
end

Instance Method Details

#addPiece(pixmap, location) ⇒ Object 



53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 53

def addPiece(pixmap, location)
	if (2.0*rand(RAND_MAX)/(RAND_MAX+1.0)).to_i == 1
        row = 0
    else
        row = @pixmaps.size
	end

    beginInsertRows(Qt::ModelIndex.new, row, row)
    @pixmaps[row] = pixmap
    @locations[row] = location
    endInsertRows()
end

#data(index, role) ⇒ Object 



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 36

def data(index, role)
    if !index.valid?
        return Qt::Variant.new
	end

    if role == Qt::DecorationRole
        return qVariantFromValue(Qt::Icon.new(@pixmaps[index.row].scaled(60, 60,
                         Qt::KeepAspectRatio, Qt::SmoothTransformation)))
    elsif role == Qt::UserRole
        return qVariantFromValue(@pixmaps[index.row])
    elsif role == Qt::UserRole + 1
        return qVariantFromValue(@locations[index.row])
	end

    return Qt::Variant.new
end

#dropMimeData(data, action, row, column, parent) ⇒ Object 



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
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 123

def dropMimeData(data, action, row, column, parent)
    if !data.hasFormat("image/x-puzzle-piece")
        return false
	end

    if action == Qt::IgnoreAction
        return true
	end

    if column > 0
        return false
	end

    if !parent.valid? && row < 0
        endRow = @pixmaps.size
    elsif !parent.valid?
        endRow = [row, pixmaps.size()].min
    else
        endRow = parent.row
	end

    encodedData = data.data("image/x-puzzle-piece")
    stream = Qt::DataStream.new(encodedData, Qt::IODevice::ReadOnly)

    while !stream.atEnd
        pixmap = Qt::Pixmap.new
        location = Qt::Point.new
        stream >> pixmap >> location

        beginInsertRows(Qt::ModelIndex.new, endRow, endRow)
        @pixmaps.insert(endRow, pixmap)
        @locations.insert(endRow, location)
        endInsertRows()

        endRow += 1
    end

    return true
end

#flags(index) ⇒ Object 



66
67
68
69
70
71
72
73
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 66

def flags(index)
    if index.valid?
        return (Qt::ItemIsEnabled | Qt::ItemIsSelectable |
                Qt::ItemIsDragEnabled | Qt::ItemIsSelectable | Qt::ItemIsDropEnabled)
    end

    return Qt::ItemIsEnabled | Qt::ItemIsDropEnabled
end

#mimeData(indexes) ⇒ Object 



105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 105

def mimeData(indexes)
    mimeData = Qt::MimeData.new
    encodedData = Qt::ByteArray.new

    stream = Qt::DataStream.new(encodedData, Qt::IODevice::WriteOnly)

    indexes.each do |index|
        if index.valid?
            pixmap = qVariantValue(Qt::Pixmap, data(index, Qt::UserRole))
            location = data(index, Qt::UserRole+1).toPoint
            stream << pixmap << location
        end
    end

    mimeData.setData("image/x-puzzle-piece", encodedData)
    return mimeData
end

#mimeTypes ⇒ Object 



99
100
101
102
103
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 99

def mimeTypes()
    types = []
    types << "image/x-puzzle-piece"
    return types
end

#removeRows(row, count, parent) ⇒ Object 



75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 75

def removeRows(row, count, parent)
    if parent.valid?
        return false
	end

    if row >= @pixmaps.size() || row + count <= 0
        return false
	end

    beginRow = [0, row].max
    endRow = [row + count - 1, @pixmaps.size() - 1].min

    beginRemoveRows(parent, beginRow, endRow)

    while beginRow <= endRow
        @pixmaps.delete(beginRow)
        @locations.delete(beginRow)
        beginRow += 1
    end

    endRemoveRows()
    return true
end

#rowCount(parent) ⇒ Object 



163
164
165
166
167
168
169
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 163

def rowCount(parent)
    if parent.valid?
        return 0
    else
        return @pixmaps.size
	end
end

#supportedDropActions ⇒ Object 



171
172
173
 
# File 'ext/ruby/qtruby/examples/itemviews/puzzle/piecesmodel.rb', line 171

def supportedDropActions
    return Qt::CopyAction | Qt::MoveAction
end