Module: Asposeslidesjava::Thumbnail

Defined in:
lib/asposeslidesjava/Slides/thumbnail.rb

Instance Method Summary collapse

Instance Method Details

#create_thumbnail ⇒ Object

Generating a Thumbnail from a Slide



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# File 'lib/asposeslidesjava/Slides/thumbnail.rb', line 18

def create_thumbnail()
    data_dir = File.dirname(File.dirname(File.dirname(File.dirname(__FILE__)))) + '/data/'
            
    # Instantiate Presentation class that represents the presentation file
    pres = Rjb::import('com.aspose.slides.Presentation').new(data_dir + 'demo.pptx')

    # Access the first slide
    slide = pres.getSlides().get_Item(0)

    # Create a full scale image
    image = slide.getThumbnail()

    # Save the image to disk in JPEG format
    Rjb::import('javax.imageio.ImageIO').write(image, "jpeg", Rjb::import('java.io.File').new(data_dir + "ContentBG_tnail.jpg"))

    puts "Created thumbnail, please check the output file."
end

#create_thumbnail_custom_size ⇒ Object

Generating a Thumbnail from a Slide with User Defined Dimensions



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# File 'lib/asposeslidesjava/Slides/thumbnail.rb', line 37

def create_thumbnail_custom_size()
    data_dir = File.dirname(File.dirname(File.dirname(File.dirname(__FILE__)))) + '/data/'
            
    # Instantiate Presentation class that represents the presentation file
    pres = Rjb::import('com.aspose.slides.Presentation').new(data_dir + 'demo.pptx')

    # Access the first slide
    slide = pres.getSlides().get_Item(0)

    # User defined dimension
    desired_x = 1200
    desired_y = 800

    # Getting scaled value  of X and Y
    scale_x = (1.0 / pres.getSlideSize().getSize().getWidth()) * desired_x
    scale_y = (1.0 / pres.getSlideSize().getSize().getHeight()) * desired_y

    # Create a full scale image
    image = slide.getThumbnail(scale_x, scale_y)

    # Save the image to disk in JPEG format
    Rjb::import('javax.imageio.ImageIO').write(image, "jpeg", Rjb::import('java.io.File').new(data_dir + "ContentBG_tnail.jpg"))

    puts "Created thumbnail with custom size, please check the output file."
end

#create_thumbnail_in_notes_slides_view ⇒ Object

Generating a Thumbnail from a Slide in Notes Slides View



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# File 'lib/asposeslidesjava/Slides/thumbnail.rb', line 64

def create_thumbnail_in_notes_slides_view()
    data_dir = File.dirname(File.dirname(File.dirname(File.dirname(__FILE__)))) + '/data/'
            
    # Instantiate Presentation class that represents the presentation file
    pres = Rjb::import('com.aspose.slides.Presentation').new(data_dir + 'demo.pptx')

    # Access the first slide
    slide = pres.getSlides().get_Item(0)

    # User defined dimension
    desired_x = 1200
    desired_y = 800

    # Getting scaled value  of X and Y
    scale_x = (1.0 / pres.getSlideSize().getSize().getWidth()) * desired_x
    scale_y = (1.0 / pres.getSlideSize().getSize().getHeight()) * desired_y

    # Create a full scale image
    image = slide.getNotesSlide().getThumbnail(scale_x, scale_y)

    # Save the image to disk in JPEG format
    Rjb::import('javax.imageio.ImageIO').write(image, "jpeg", Rjb::import('java.io.File').new(data_dir + "ContentBG_tnail.jpg"))

    puts "Created thumbnail in notes slides view, please check the output file."
end

#create_thumbnail_of_user_defined_window ⇒ Object

Generating a Thumbnail of User Defined Window from a Slide



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# File 'lib/asposeslidesjava/Slides/thumbnail.rb', line 91

def create_thumbnail_of_user_defined_window()
    data_dir = File.dirname(File.dirname(File.dirname(File.dirname(__FILE__)))) + '/data/'
            
    # Instantiate Presentation class that represents the presentation file
    pres = Rjb::import('com.aspose.slides.Presentation').new(data_dir + 'demo.pptx')

    # Access the first slide
    slide = pres.getSlides().get_Item(0)

    # Create a full scale image
    image = slide.getThumbnail(1,1)

    # Getting the image of desired window inside generated slide thumnbnail
    # BufferedImage window = image.getSubimage(windowX, windowY, windowsWidth, windowHeight);
    window_image = image.getSubimage(100, 100, 200, 200)

    # Save the image to disk in JPEG format
    Rjb::import('javax.imageio.ImageIO').write(image, "jpeg", Rjb::import('java.io.File').new(data_dir + "ContentBG_tnail.jpg"))

    puts "Created thumbnail of user defined window, please check the output file."
end

#initialize ⇒ Object 



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# File 'lib/asposeslidesjava/Slides/thumbnail.rb', line 3

def initialize()
    # Generating a Thumbnail from a Slide
    create_thumbnail()

    # Generating a Thumbnail from a Slide with User Defined Dimensions
    create_thumbnail_custom_size()

    # Generating a Thumbnail from a Slide in Notes Slides View
    create_thumbnail_in_notes_slides_view()

    # Generating a Thumbnail of User Defined Window from a Slide
    create_thumbnail_of_user_defined_window()
end