Class: MultiImageCanvas

Inherits:
Fox::FXScrollWindow
  • Object
show all
Includes:
Fox, Responder
Defined in:
lib/piggy-gui/multiimagecanvas.rb

Overview

Shows multiple images in a sigle widget.

Constant Summary collapse

CacheSize = 
200

Instance Method Summary collapse

Constructor Details

#initialize(p1, p2) ⇒ MultiImageCanvas

Returns a new instance of MultiImageCanvas.



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 15

def initialize(p1, p2)
  super(p1, p2)
  draw_area = FXCanvas.new(self, nil, 0,
    FRAME_NORMAL|LAYOUT_FILL_X|LAYOUT_FILL_Y)
  draw_area.connect(SEL_PAINT, method(:on_paint))
  @contentWidth = width
  @contentHeight = height
  @images = Array.new
  @buffer = nil
  @thumbs = Hash.new
  @fifoThumbsKeys = Array.new
  @imgProcessor = ImageProcessor.new getApp
end

Instance Method Details

#cache_thumb_for(file, img) ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 98

def cache_thumb_for(file, img)
  @imgProcessor.fit_image(img, 100, 100, 0)
  @thumbs[file] = img
  @fifoThumbsKeys.push(file)
  if @fifoThumbsKeys.size > CacheSize
    thumb_to_destroy = @fifoThumbsKeys.shift
    @thumbs[thumb_to_destroy].destroy
    @thumbs.delete(thumb_to_destroy)
  end
end

#destroy_all(imageCache) ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 29

def destroy_all(imageCache)
  @imgProcessor.destroy_all(imageCache)
end

#fit ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 109

def fit
  img = image
  w = getWidth
  h = getHeight
  return if img.nil? || w < 5 || h < 5
  FXMemoryStream.open(FXStreamLoad, @buffer) do |stream|
    img.loadPixels(stream)
  end
  @imgProcessor.fit_image(img, w, h)
  force_refresh
end

#force_refresh ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 127

def force_refresh
  contentWindow.update
  contentWindow.repaint
  contentWindow.recalc
  repaint
end

#get_content_height ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 41

def get_content_height
  return @contentHeight
end

#get_content_width ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 37

def get_content_width
  return @contentWidth
end

#image ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 49

def image
  return @images.empty? ? nil : @images[0]
end

#image_processor ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 33

def image_processor
  return @imgProcessor
end

#images ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 45

def images
  return @images
end

#load_and_show_image(file) ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 57

def load_and_show_image(file)
  load_image(file)
end

#load_image(file, additive = false, degree = 0) ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 61

def load_image(file, additive=false, degree=0)
  if additive && @thumbs.has_key?(file)
    images.push(@thumbs[file]) 
    return
  end
  unless @imgProcessor.is_supported_image_file? file
    FXMessageBox.error(self, MBOX_OK, "Warning image type",
      "Unsupported image type: #{file}")
    return
  end
  getApp.beginWaitCursor do
    img = @imgProcessor.load_image(file, false)
    unless degree == 0
      @imgProcessor.rotate_image(img, degree)
    end
    destroy_all(@images) if !additive
    images.push(img)
    if additive
      cache_thumb_for(file, img)
    else
      w = img.getWidth
      h = img.getHeight
      if(w > 1600 && h > 1000)
        # reduce footprint
        @imgProcessor.fit_image(img, 1600, 1000, 1)
      end
      FXMemoryStream.open(FXStreamSave, nil) do |stream|
        img.savePixels(stream)
        @buffer = stream.takeBuffer
      end
      @imgProcessor.fit_image(img, getWidth, getHeight, 1)
    end
    img.create
    force_refresh if !additive
  end
end

#load_images(files) ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 121

def load_images(files)
  images.clear
  files.each { |f| load_image(f, true) }
  force_refresh
end

#on_paint(sender, sel, unused) ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 134

def on_paint(sender, sel, unused)
  sdc = FXDCWindow.new(contentWindow)
  sdc.fillRectangle(0, 0, width, height)
  unless images.empty? || width < 5 || height < 5
    # Draw image table
    x = 0;
    y = 0;
    line_height = 0
    sub_width = images.size == 1 ? 0 : 16 # width for vScrollbar
    max_w = [images[0].width + sub_width, width].max
    images.each { |img|
      imgHeight = img.height
      imgWidth = img.width
      max_w = imgWidth if imgWidth + sub_width > max_w
      if x + img.width > max_w - sub_width
        x = 0
        y += line_height + 4
        line_height = 0
      end
      line_height = imgHeight if imgHeight > line_height
      sdc.drawImage(img, x, y)
      sdc.fillRectangle(x, y + imgHeight, x + imgWidth, y + line_height)
      x += imgWidth + 4
    }
    @contentWidth = max_w
    @contentHeight = y + line_height
  end
  sdc.end
end

#set_images(imageArray) ⇒ Object 



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# File 'lib/piggy-gui/multiimagecanvas.rb', line 53

def set_images(imageArray)
  @images = imageArray
end