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class ChartForm
def load( filename )
file = Qt::File.new( filename )
if !file.open( Qt::IO_ReadOnly )
statusBar().message( "Failed to load \'%s\'" % filename, 2000 )
return
end
init() # Make sure we have colours
@filename = filename
ts = Qt::TextStream.new( file )
errors = 0
i = 0
while !ts.eof()
element = Element.new
ts >> element
if element.isValid()
@elements[i] = element
i += 1
else
errors += 1
end
if i == MAX_ELEMENTS
statusBar().message("Read maximum number of elements (%d) discarding others" % i, 2000 )
break
end
end
file.close()
bad = ""
if errors > 0
bad = " skipped %d bad record" % errors
if errors > 1
bad += "s"
end
end
statusBar().message( "Read %d values from \'%s\'" % [i, filename], 3000 )
setCaption( "Chart -- %s" % filename )
updateRecentFiles( filename )
drawElements()
@changed = false
end
def fileSave()
if @filename.nil?
fileSaveAs()
return
end
file = Qt::File.new( @filename )
if !file.open( Qt::IO_WriteOnly )
statusBar().message( "Failed to save \'%s\'" % @filename, 2000 )
return
end
ts = Qt::TextStream.new( file )
for i in 0...MAX_ELEMENTS
if @elements[i].isValid()
ts << @elements[i]
end
end
file.close()
setCaption( "Chart -- %s" % @filename )
statusBar().message( "Saved \'%s\'" % @filename, 2000 )
@changed = false
end
def fileSaveAsPixmap()
filename = Qt::FileDialog.getSaveFileName(nil, "Images (*.png *.xpm *.jpg)",
self, "file save as bitmap",
"Chart -- File Save As Bitmap" )
if Qt::Pixmap.grabWidget( @canvasView ).save( filename,
filename.sub(/.*\.([^.]*)$/, '\1').upcase() )
statusBar().message( "Wrote \'%s\'" % filename, 2000 )
else
statusBar().message( "Failed to write \'%s\'" % filename, 2000 )
end
end
def filePrint()
if !@printer
@printer = Qt::Printer.new
end
if @printer.setup()
painter = Qt::Painter.new( @printer )
@canvas.drawArea( Qt::Rect.new( 0, 0, @canvas.width(), @canvas.height() ),
painter, false )
if !@printer.outputFileName().empty?
statusBar().message( "Printed \'%s\'" % @printer.outputFileName(), 2000 )
end
end
end
end
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