The core functionality is to create a new type of widget that will be flexible enough for the most use cases required for ad-hoc graphing.

The new widget must support:

1. Server-side SVG based graph generation
2. Ability to select set of items for graphing using one or more conditions:
   1. Host and item name
   2. Both host and item name will support character '*' for pattern matching
3. Ability to overwrite graphing options for a set of items selected using one or more conditions:
   1. Host and item name
   2. Both host and item name will support character '*' for pattern matching
4. Each data set will support the following options
   1. Draw type: Lines, Points, Staircase
      1. Additional optional attributes for different draw types:
         1. Filled (0-10, 5 (30%) is default): fill it, available for Lines
         2. Radius (3 is default): available for Points.
   2. Color: selection of color
   3. Width (0-10, 1 is default): line width
   4. Transparency (0-10, 5 (50%) is default): transparency level.
   5. Y axis: Left (default), Right
   6. Time shift: none (default) or using format like -1h, 1h, -1d, -1m, etc.
   7. Time period: none (default) or override using Time from and Time to.
   8. Options to support missing data. Gaps will be calculated as lack of data exceeding three times average distance between time stamps (the algorithm may be adjusted later on).
      1. None: leave gap empty
      2. Connected: connect two border values
      3. Treat as 0: display as 0 values
5. The widget will support the following options:
   1. Legend can be displayed in two modes:
      1. None: no legend is displayed
      2. Short (default): short legend is displayed under graph
   2. Ability to select set of problems for displaying as highlighted area using one or more conditions:
      1. None: no problems displayed
      2. Selected metrics (default), by host, by severity, by trigger tags (including choice of AND/OR), by problem name.
   3. Optional attributes for left and right Y axis, per axis:
      1. Min and max values: calculated (default), fixed value
      2. Display axis: show (default), hide
   4. Optional attributes for X axis:
      1. Display axis: show (default), hide
   5. A tooltip will be display additional information on mouse over:
      1. Displayed data point: all values for current X coordinate
      2. Problem area: details of all for the point on area
   6. Selection of history data:
      1. Auto (default): automatically as implemented currently
      2. History: all data is taken from history
      3. Trends: all data is taken from trends
   7. Options to display left and right Y axis units, per axis
      1. Auto: values will be displayed using units of the first item
      2. Static: overwrite units with given string

Support of macros $1-$9 in item names must be removed in order to make pattern matching work.

The widget configuration form must be optimized for making one-click modifications without forcing users to use hierarchical controls, if possible. That is why, for example, Lines and Staircase made as separate drawing types.