Class: FlowLayout

Inherits:
Qt::Layout
  • Object
show all
Defined in:
ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb

Instance Method Summary collapse

Constructor Details

#initialize(parent = nil, spacing = -1)) ⇒ FlowLayout

Returns a new instance of FlowLayout.



29
30
31
32
33
34
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 29

def initialize(parent = nil, spacing = -1)
    super(parent)
#	    setMargin(margin)
    setSpacing(spacing)
	@itemList = []
end

Instance Method Details

#addItem(item) ⇒ Object 



36
37
38
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 36

def addItem(item)
    @itemList << item
end

#count ⇒ Object 



40
41
42
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 40

def count()
    return @itemList.length()
end

#doLayout(rect, testOnly) ⇒ Object 



85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 85

def doLayout(rect, testOnly)
    x = rect.x
    y = rect.y
    lineHeight = 0

	@itemList.each do |item|
        nextX = x + item.sizeHint().width() + spacing()
        if nextX - spacing() > rect.right() && lineHeight > 0
            x = rect.x()
            y = y + lineHeight + spacing()
            nextX = x + item.sizeHint().width() + spacing()
            lineHeight = 0
        end

        if !testOnly
            item.setGeometry(Qt::Rect.new(Qt::Point.new(x, y), item.sizeHint()))
		end

        x = nextX
        lineHeight = [lineHeight, item.sizeHint().height()].max
    end
    return y + lineHeight - rect.y()
end

#expandingDirections ⇒ Object 



56
57
58
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 56

def expandingDirections()
    return 0
end

#hasHeightForWidth ⇒ Object 



60
61
62
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 60

def hasHeightForWidth()
    return true
end

#heightForWidth(width) ⇒ Object 



64
65
66
67
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 64

def heightForWidth(width)
    height = doLayout(Qt::Rect.new(0, 0, width, 0), true)
    return height
end

#itemAt(index) ⇒ Object 



44
45
46
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 44

def itemAt(index)
    return @itemList[index]
end

#minimumSize ⇒ Object 



78
79
80
81
82
83
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 78

def minimumSize()
    size = Qt::Size.new
	@itemList.each { |item| size = size.expandedTo(item.minimumSize()) }
    size += Qt::Size.new(2*margin(), 2*margin())
    return size
end

#setGeometry(rect) ⇒ Object 



69
70
71
72
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 69

def setGeometry(rect)
    super(rect)
    doLayout(rect, false)
end

#sizeHint ⇒ Object 



74
75
76
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 74

def sizeHint()
    return minimumSize()
end

#takeAt(index) ⇒ Object 



48
49
50
51
52
53
54
 
# File 'ext/ruby/qtruby/examples/layouts/flowlayouts/flowlayout.rb', line 48

def takeAt(index)
    if index >= 0 && index < @itemList.length
        return @itemList.delete_at(index)
    else
        return nil
	end
end