Object PmgTrendViewer (Trend viewer)

Description:

See: PmgTrendViewer - Deatiled object description

Graphic Object used for viewing trends.

The whole panel containing this object used for viewing the trends including trend list table, the instrumental buttons, etc. can be created easily - see Preconfiguration "Trend viewer".

This object adopts properties and methods of the PmgObject object.

Properties and methods:

Action	Performs the action in the trend viewer
AddServer	Registration of server into list in the viewer
AddTrend	Creates a new object of the tvTrend type
Autoscroll	Enable/disable Autoscroll
AutoscrollRate	Period of reading data in seconds while autoscroll is switched on
AutoscrollSize	How much to scroll
AutoscrollSizeUnit	Unit of the AutoscrollSize property values
AutoscrollType	Automatic scroll type
BackgroundColor	Background color of the viewer
CompressType	Evaluation type for the data compression
CursorColor	Color of the cursor
CursorTime	Time referring to vertical cursor line
CursorTimeColor	Color of the cursor label time
CursorTimeLocation	Cursor time location
CursorType	Cursor type, its appearance
DataTimeout	Maximum time to wait for data
DlgTrends	Opens the window for runtime configuration of trend viewer
Draw	Redrawing of whole object
FindTrend	Searching object of the tvTrend type
GetCfg	Returns current values of configuration data of the viewer and displayed treds
GetState	Returns viewer state
GetStateText	Returns the current state of the viewer in text form
GraphInit	Returns tvGraph object - initializing object for drawing
GridTime	Returns object of the tvGrid type (vertical lines of grid on time axis)
GridValue	Returns object of the tvGrid type (horizontal lines of grid on value axis)
InsertTrend	Creates a new object of the tvTrend type
LastCfgSrc	Reference to recently loaded configuration file
LastCfgTitle	The name of the recently loaded configuration file
LastErr	Numeric code of the last risen error
LastErrText	Text of the last risen error
LoadCfg	Reading configuration data of the viewer
PointsMaxVisibleCount	Maximum number of displayed points in viewer range
ReadData	Sending the request for current data
RemoveAllTrends	Deletes all trends
RemoveTrend	Removes the specified trend
SaveCfg	Saving current configuration data of the viewer
SaveToHtm	Creates an HTML page for data of the viewer
ScaleTime	Returns object of the tvScale type (time scale)
ScaleValue	Returns object of the tvScale type (value scale)
ScrollTime	Scroll of the viewer on the time scale
ScrollValue	Scroll of the viewer on value scale
SetUserControl	Enables/disables the user control of the viewer
TableHeadBgColor	Background color of head in the table mode
TableHeadFont	Font of head legends in the table mode
TableHeadRowHigh	Height of head row in the table mode
TableHeadTextColor	Color of head legends in the table mode
TableOper	Setting some parameters in the table mode
TableRowHigh	Height of data row in the table mode
TableTimeBgColor	Background color of time column in the table mode
TableTimeColumnWidth	Width of time column in the table mode
TableTimeFont	Font of time column in the table mode
TableTimeFormat	Format of time column values in the table mode
TableTimeFormatType	Format type of time column values in the table mode
TableTimeTextColor	Color of time column values in the table mode
TimeMax	Time of viewer right edge
TimeMin	Time of viewer left edge
TimeSetType	Type of input time values in viewer methods
TimeType	Type of values on horizontal axis (time or number)
TimeZoomMax	Maximum limit of viewer time axis range
TimeZoomMaxForPoints	Maximum limit of viewer time axis range for displaying points
TimeZoomMaxForValues	Maximum limit of viewer time axis range for displaying point values
TimeZoomMin	Minimum limit of viewer time axis range
TimeZoomMinForCompress	Minimum range of viewer time axis range for displaying calculated points
TrendActive	Index of active tvTrend object
TrendArea	Returns tvTrendArea object (trends area)
Trends	Returns tvTrend object
TrendsCount	Returns number of tvTrend subobjects
ValueZoomMode	Value axis range setup method
ViewMode	Switches from/to the table mode
ZoomTime	Change of range, viewer zoom on time scale
ZoomValue	Zooming trends on value scale

Events:

onCursorTimeChange	Is triggered when time on vertical cursor line position changed
onDataTrendReady	Is triggered when viewer got data from server
onError	Is triggered if error occured in the viewer
onFocusIn	Is triggered if the object receives focus
onFocusOut	Is triggered if the object loses focus
onKeyPress	Is triggered after pressing or releasing the key of the keyboard
onMenuFill	Is triggered after pressing by the right mouse button over the Pmg object
onMenuSelect	Is triggered on the selection of an item from the Pmg object local menu
onModeChange	Is triggered when the Pmg object mode changes
onMouseArea	Is triggered when user clicked into the graph drawing area by the mouse
onMousePress	Is triggered after pressing or releasing the left mouse button
onReadData	Is triggered any time when viewer asks for new data
onRefresh	Is triggered on the data refresh of the Pmg object
onStart	Is triggered on the construction of the Pmg object in the course of opening the panel
onStop	Is triggered on the destruction of the Pmg object in the course of closing the panel
onTimeChange	Is triggered when begin or end time of viewer changed
onTrendParamsChange	Is triggered on viewer start or if basic parameter of one of the tvTrend type object has been changed

Related objects:

tvTrendArea	(*TrendViewer area*) Object represents area where graphs are drawn
tvGraph	(*TrendViewer graph*) The object for drawing trend
tvGrid	(*TrendViewer grid*) Object that represents grid lines
tvPoints	(*TrendViewer points*) Object that holds data points of trend
tvScale	(*TrendViewer scale*) Object represents a scale
tvTicks	(*TrendViewer scale ticks*) Object for configuration of scale ticks or grid lines layout
tvTrend	(*TrendsView trend*) Object represents one trend variable

Configuration tabs:

Object	General information about the object
Content	Content of the Pmg object in the XML form
Position	Setting the position, width and height of the Pmg object
Variables	List and configuration of user defined Pmg object variables
Events	Algorithms definition for the object events
Methods	Definition of designer's method of the Pmg object
Box	Setting the background area of the Pmg object
Viewer	Trend viewer basic parameters setup
Trends	Create and edit a list of trends
Appearance	Appearance setup of individual parts of the trend viewer.

History:

Pm9.00.14: Modified preconfiguration controls, added context menu in the viewer and new function for displaying values of the active trend as a table in new window.

Pm9.00.08: It allows to connect to HTTPS servers

Pm9.00.05: When displaying the value (Label)

- for long names the buffer of 101 characters could overflow and cause malfunction

- the accuracy mask had only 6 places. When trying to display to many decimal digits only the whole number was shown.

Pm9.00.00: Object name changed: PmiAx-TrendsView -> PmgTrendViewer

Pm8.03.29: Fixed bug: for Web panels

Pm8.03.24: Fixed bug: Web panels (AlignType, TableColumnWidth, ValueZoomMode, EnabledInTable, UserValue)

Pm8.03.22: Fixed bug: in Web panels:

- Improved transition between standard and daylight saving time.

- Repeated calling the RemoveAllTrends method did not work.

- Setting the properties ValueMin and ValueMax in reversed order caused the scale to flip.

Pm8.03.20: Fixed bug: Web panels - Trends can now be viewed also from other PROMOTIC applications.

Pm8.03.17: Web panels - In Chrome browser, the configuration of trends (colours, styles etc.) is now functional.

Pm8.03.14: Web panel - in JavaScript Web panels:

- The "PmgTrendViewer > Value axis grid > Line type" configurator is now functional.

- Fixed bug: if tvTrend was set as invisible in the configuration file, then it was still visible on the Web.

- Fixed bug: The RemoveAllTrends method generated error if no trend was present.

- showing a trend description on the cursor position now including the timestamp - see SetUserControl("click:showvaltimename(trend=all)").

Pm8.03.13: in JavaScript Web panels:

- Fixed bug: Chart of the Constant type was not rendered correctly under some conditions.

- Fixed bug: Texts rendered next to points were not appearing beneath each other but were overlaping.

Pm8.03.11: Bugfix vulnerability of this object in HTML pages.

Pm8.03.07: Fixed bug: in JavaScript Web panels: sometimes did not render correctly in Chrome browser.

Pm8.03.06: Fixed bug: in JavaScript Web panels:

- Rendering when no trend was connected.

- Rendering when scrolling in the table mode.

Pm8.03.05: Fixed bug: While configuring the object the panel editor sometimes failed (bug since Pm8.3.4 version).

Pm8.03.04: in JavaScript panels:

- New methods AddPoints, GetTimeArray and GetValueArray.

- Improved values rendering in trends after mouseclick.

Pm8.02.16: in JavaScript panels: Minor bugfixes and improvements.

Pm8.02.15:

The printing in the table mode used incorrect formatting.

- Trend printing from Web browser is now functional by using the methods SaveToHtm and Pm.PrintHtmlPage. The print button in the preconfiguration of the trend viewer is now configured correctly.

- Several rendering bugfixes.

Pm8.02.14: in JavaScript panels:

- The scale background color is now functional (the "Background color" configurator).

- The CursorTime and CursorValue properties are now functional.

- The onCursorTimeChange event is now functional.

Pm8.02.13: emulated in HTML (i.e. in JavaScript panels):

- The time is now displayed on mouse cursor.

- Bugfix in the AddTrend method.

Pm8.02.12: emulated in HTML (i.e. in JavaScript panels):

- The TimeMin and TimeMax properties are now functional

- Table view of trends is now functional

Pm8.01.06: