class PreviewDialog

# File examples/painting/fontsampler/previewdialog.rb, line 44
def initialize(printer, parent)
    super(parent) 
    @printer = printer
    @ui = Ui_PreviewDialogBase.new
    @ui.setupUi(self)

    @currentPage = 0
    @pageCount = 0
    @ui.pageList.setIconSize(Qt::Size.new(SmallPreviewLength, SmallPreviewLength))
    @ui.pageList.header().hide()
    @previewLabel = PreviewLabel.new
    @printer = Qt::Printer.new
    @ui.previewArea.widget = @previewLabel
    setupComboBoxes()

    @ui.buttonBox.button(Qt::DialogButtonBox::Ok).text = tr("&Print")
end

# File examples/painting/fontsampler/previewdialog.rb, line 148
def accept()
    markedPages = 0
    for pageIndex in 0..@ui.pageList.topLevelItemCount
        if @ui.pageList.topLevelItem(pageIndex).checkState(0) == Qt::Checked
            markedPages += 1
        end
    end

    # Print all pages that have yet to be previewed.
    markedPages += @pageCount - pageIndex

    @printer.pageSize = @ui.paperSizeCombo.itemData(@ui.paperSizeCombo.currentIndex()).to_i
    @printer.orientation = paperOrientationCombo.itemData(paperOrientationCombo.currentIndex()).to_i

    dialog = Qt::PrintDialog.new(@printer, self)
    if dialog.exec() != Qt::Dialog::Accepted
        return
    end

    @ui.progressBar.maximum = markedPages
    @ui.progressBar.enabled = true
    @ui.progressBar.textVisible = true

    painter = Qt::Painter.new
    painter.begin(@printer)

    @canceled = false
    printed = 0
    firstPage = true
    for pageIndex in 0..@pageCount
        $qApp.processEvents()

        if @canceled
            break
        end

        if pageIndex >= @currentPage || isSelected(pageIndex)
            # Print all pages that are either marked or have yet to be
            # previewed.
            if !firstPage
                @printer.newPage()
            end

            emit pageRequested(pageIndex, painter, @printer)
            printed += 1
            @ui.progressBar.value = printed
            firstPage = false
        end
    end
    painter.end()

    @ui.progressBar.textVisible = false
    @ui.progressBar.enabled = false

    Qt::Dialog.accept()
end

# File examples/painting/fontsampler/previewdialog.rb, line 99
def addPage()
    if @currentPage >= @pageCount
        return
    end

    item = Qt::TreeWidgetItem.new(@ui.pageList)
    item.setCheckState(0, Qt::Checked)

    paintItem(item, @currentPage)
    if @ui.pageList.indexOfTopLevelItem(@ui.pageList.currentItem()) < 0
        @ui.pageList.currentItem = @ui.pageList.topLevelItem(0)
    end

    $qApp.processEvents()
    @currentPage += 1

    Qt::Timer.singleShot(0, self, SLOT('addPage()'))
end

# File examples/painting/fontsampler/previewdialog.rb, line 205
def isSelected(index)
    if index >= 0 && index < @ui.pageList.topLevelItemCount
        return @ui.pageList.topLevelItem(index).checkState(0) == Qt::Checked
    else
        return false
    end
end

# File examples/painting/fontsampler/previewdialog.rb, line 226
def on_pageList_currentItemChanged()
    if @ui.pageList.indexOfTopLevelItem(@ui.pageList.currentItem()) < 0
        return
    end

    pixmap = Qt::Pixmap.new(@previewLabel.size())
    paintPreview(pixmap, @ui.pageList.indexOfTopLevelItem(@ui.pageList.currentItem()))
    @previewLabel.pixmap = pixmap
    @previewLabel.update()
end

# File examples/painting/fontsampler/previewdialog.rb, line 248
def on_paperOrientationCombo_activated(index)
    @printer.orientation = @ui.paperOrientationCombo.itemData(index.to_i)

    for index in 0..@ui.pageList.topLevelItemCount
        paintItem(@ui.pageList.topLevelItem(index), index)
    end

    on_pageList_currentItemChanged()
end

# File examples/painting/fontsampler/previewdialog.rb, line 237
def on_paperSizeCombo_activated(index)
    Qt.debug_level = 100
    @printer.paperSize = @ui.paperSizeCombo.itemData(index.to_i).value

    for index in 0..@ui.pageList.topLevelItemCount
        paintItem(@ui.pageList.topLevelItem(index), index)
    end

    on_pageList_currentItemChanged()
end

# File examples/painting/fontsampler/previewdialog.rb, line 123
def paintItem(item, index)
    pixmap = Qt::Pixmap.new(SmallPreviewLength, SmallPreviewLength)
    paintPreview(pixmap, index)
    item.setIcon(0, Qt::Icon.new(pixmap))
end

# File examples/painting/fontsampler/previewdialog.rb, line 129
def paintPreview(pixmap, index)
    longestSide = [@printer.paperRect().width(),
                              @printer.paperRect().height()].max
    width = pixmap.width() * @printer.paperRect().width() / longestSide
    height = pixmap.height() * @printer.paperRect().height() / longestSide
   
    pixmap.fill(Qt::Color.new(qRgb(224,224,224)))
    painter = Qt::Painter.new
    painter.begin(pixmap)
    painter.renderHint = Qt::Painter::Antialiasing
    painter.translate((pixmap.width() - width)/2,
                      (pixmap.height() - height)/2)
    painter.fillRect(Qt::RectF.new(0, 0, width, height), Qt::Brush.new(Qt::white))
    painter.scale(pixmap.width() / longestSide, pixmap.height() / longestSide)
    painter.translate(@printer.pageRect().topLeft())
    emit pageRequested(index, painter, @printer)
    painter.end()
end

# File examples/painting/fontsampler/previewdialog.rb, line 213
def reject()
    @canceled = true
    Qt::Dialog.reject()
end

# File examples/painting/fontsampler/previewdialog.rb, line 218
def resizeEvent(event)
    size = [[@ui.previewArea.width - @ui.previewArea.verticalScrollBar.width,
                         @ui.previewArea.height - @ui.previewArea.horizontalScrollBar.height].min,
                    LargePreviewLength].max
    @previewLabel.resize(size, size)
    on_pageList_currentItemChanged()
end

# File examples/painting/fontsampler/previewdialog.rb, line 118
def setNumberOfPages(count)
    @pageCount = count
    Qt::Timer.singleShot(0, self, SLOT('addPage()'))
end

# File examples/painting/fontsampler/previewdialog.rb, line 62
def setupComboBoxes()
    @ui.paperSizeCombo.addItem(tr("A0 (841 x 1189 mm)"), Qt::Variant.new(Qt::Printer::A0))
    @ui.paperSizeCombo.addItem(tr("A1 (594 x 841 mm)"), Qt::Variant.new(Qt::Printer::A1))
    @ui.paperSizeCombo.addItem(tr("A2 (420 x 594 mm)"), Qt::Variant.new(Qt::Printer::A2))
    @ui.paperSizeCombo.addItem(tr("A3 (297 x 420 mm)"), Qt::Variant.new(Qt::Printer::A3))
    @ui.paperSizeCombo.addItem(tr("A4 (210 x 297 mm, 8.26 x 11.7 inches)"), Qt::Variant.new(Qt::Printer::A4))
    @ui.paperSizeCombo.addItem(tr("A5 (148 x 210 mm)"), Qt::Variant.new(Qt::Printer::A5))
    @ui.paperSizeCombo.addItem(tr("A6 (105 x 148 mm)"), Qt::Variant.new(Qt::Printer::A6))
    @ui.paperSizeCombo.addItem(tr("A7 (74 x 105 mm)"), Qt::Variant.new(Qt::Printer::A7))
    @ui.paperSizeCombo.addItem(tr("A8 (52 x 74 mm)"), Qt::Variant.new(Qt::Printer::A8))
    @ui.paperSizeCombo.addItem(tr("A9 (37 x 52 mm)"), Qt::Variant.new(Qt::Printer::A9))
    @ui.paperSizeCombo.addItem(tr("B0 (1000 x 1414 mm)"), Qt::Variant.new(Qt::Printer::B0))
    @ui.paperSizeCombo.addItem(tr("B1 (707 x 1000 mm)"), Qt::Variant.new(Qt::Printer::B1))
    @ui.paperSizeCombo.addItem(tr("B2 (500 x 707 mm)"), Qt::Variant.new(Qt::Printer::B2))
    @ui.paperSizeCombo.addItem(tr("B3 (353 x 500 mm)"), Qt::Variant.new(Qt::Printer::B3))
    @ui.paperSizeCombo.addItem(tr("B4 (250 x 353 mm)"), Qt::Variant.new(Qt::Printer::B4))
    @ui.paperSizeCombo.addItem(tr("B5 (176 x 250 mm, 6.93 x 9.84 inches)"), Qt::Variant.new(Qt::Printer::B5))
    @ui.paperSizeCombo.addItem(tr("B6 (125 x 176 mm)"), Qt::Variant.new(Qt::Printer::B6))
    @ui.paperSizeCombo.addItem(tr("B7 (88 x 125 mm)"), Qt::Variant.new(Qt::Printer::B7))
    @ui.paperSizeCombo.addItem(tr("B8 (62 x 88 mm)"), Qt::Variant.new(Qt::Printer::B8))
    @ui.paperSizeCombo.addItem(tr("B9 (44 x 62 mm)"), Qt::Variant.new(Qt::Printer::B9))
    @ui.paperSizeCombo.addItem(tr("B10 (31 x 44 mm)"), Qt::Variant.new(Qt::Printer::B10))
    @ui.paperSizeCombo.addItem(tr("C5E (163 x 229 mm)"), Qt::Variant.new(Qt::Printer::C5E))
    @ui.paperSizeCombo.addItem(tr("DLE (110 x 220 mm)"), Qt::Variant.new(Qt::Printer::DLE))
    @ui.paperSizeCombo.addItem(tr("Executive (7.5 x 10 inches, 191 x 254 mm)"), Qt::Variant.new(Qt::Printer::Executive))
    @ui.paperSizeCombo.addItem(tr("Folio (210 x 330 mm)"), Qt::Variant.new(Qt::Printer::Folio))
    @ui.paperSizeCombo.addItem(tr("Ledger (432 x 279 mm)"), Qt::Variant.new(Qt::Printer::Ledger))
    @ui.paperSizeCombo.addItem(tr("Legal (8.5 x 14 inches, 216 x 356 mm)"), Qt::Variant.new(Qt::Printer::Legal))
    @ui.paperSizeCombo.addItem(tr("Letter (8.5 x 11 inches, 216 x 279 mm)"), Qt::Variant.new(Qt::Printer::Letter))
    @ui.paperSizeCombo.addItem(tr("Tabloid (279 x 432 mm)"), Qt::Variant.new(Qt::Printer::Tabloid))
    @ui.paperSizeCombo.addItem(tr("US Common #10 Envelope (105 x 241 mm)"), Qt::Variant.new(Qt::Printer::Comm10E))
    @ui.paperSizeCombo.currentIndex = @ui.paperSizeCombo.findData(Qt::Variant.new(Qt::Printer::A4))

    @ui.paperOrientationCombo.addItem(tr("Portrait"), Qt::Variant.new(Qt::Printer::Portrait))
    @ui.paperOrientationCombo.addItem(tr("Landscape"), Qt::Variant.new(Qt::Printer::Landscape))
end