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+
+
+ +

NAME

+planchet - Create and manipulate planchet widgets +

SYNOPSIS +

+planchet pathName ?options ? +

STANDARD OPTIONS

+

+

+ -background    -insertwidth    -state +
+ -insertbackground    -relief    -tile
+ -cursor    -insertborderwidth    -selectbackground    -takefocus +
+ -highlightbackground    -insertofftime    -selectborderwidth    -xscrollcommand
+ -highlightcolor    -insertontime    -selectforeground    -yscrollcommand +
+

+See the options manual entry for details on the standard options.

+Note: + Standard optiosn -highlightthickness and -bordewidth are ignored by planchet, +and set to 0. Therefore -relief options have no effect. +

WIDGET-SPECIFIC +OPTIONS

+

+

+Command-Line Name:    -coordformat
+ Database Name:    coordFormat
+ Database +Class:    CoordFormat
+ +

+ +
Specifies format string to display current map coordinates, +if no projection
+
defined. Defaults to "X=%0.8g Y=%0.8g"
+
+

+

+Command-Line Name:    -orient +
+ Database Name:    orient
+ Database Class:    Orient
+ +

+ +
Specifies printing orientation +for this planchet. May be either portrait
+
or landscape. Defaults to landscape +
+
+

+

+Command-Line Name:    -lookwidth
+ Database Name:    lookWidth
+ Database Class:    LookWidth +
+ +

+ +
Wraplength of text in popup look window. Defaults to 200.
+
+
+

+

+Command-Line +Name:    -shiftfactor
+ Database Name:    shiftFactor
+ Database Class:    ShiftFactor +
+ +

+ +
Specifies share of window size to move on shift widget command.
+
Defaults +to 0.75
+
+

+

+Command-Line Name:    -resizable
+ Database Name:    resizable
+ Database +Class:    Resizable
+ +

+ +
Specifies a boolean value that indicates whether or +not should planchet
+
adjust its width/height ratio, when coordinate limits +are first defined.
+
+

+

+Command-Line Name:    -rulerpos
+ Database Name:    rulerPos +
+ Database Class:    RulerPos
+ +

+ +
Indicates position of scale ruler in planchet. +(its left end). Should be
+
list of two coordinates in any form, acceptable +by Tk. Positive values are measured from top and left and negative from +lower and right side of planchet
+
+

+

+Command-Line Name:    -scalevar
+ Database +Name:    scaleVar
+ Database Class:    Variable
+ +

+ +
Specifies the name of variable. +Current scale of map would be stored in
+
this variable automatically upon +each change of scale in form 1:denominator. If variable doesn't exist in +global scope, it would be created.
+
+

+

+Command-Line Name:    -statusline
+ Database +Name:    statusLine
+ Database Class:    none
+ +

+ +
Specifies name of label widget +which would be used for displaying status
+
information of planchet (i.e. +current mouse pointer coordinates). Widget should exist before creating +planchet or before passing it to planchet configure command.
+
+

+

+Command-Line +Name:    -legbox
+ Database Name:    legBox
+ Database Class:    none
+ +

+ +
Specifies +name of canvas widget which would display scrollable legend of
+
base +layer. Note, that scrollable legend is not printed automatically by print +command. All contents of this widget would be erased each time base layer +changed in planchet.
+
+

+

+Command-Line Name:    -zoombutton
+ Database Name:    zoomButton +
+ Database Class:    none
+ +

+ +
Specifies name of button, which is used to initiate +zoom operation on
+
canvas. (usially via zoom ) widget command. Planchet +controls its state, disabling it, if coordinate system is not defined. +It should exist before it passed to planchet.
+
+

+

+Command-Line Name:    -unzoombuttons +
+ Database Name:    unzoomButtons
+ Database Class:    none
+ +

+ +
Specifies list +of buttons, which are used to perform various unzoom operations
+
(like +unzoom or limits default widget commands). Planchet controls their state, +disabling them if such operations are impossible.
+
+

+

+Command-Line Name:    -shiftbuttons +
+ Database Name:    shiftButtons
+ Database Class:    none
+ +

+ +
Specifies list of +four buttons for perform shift operation on planchet.
+
Buttons are specified +in following order left(west) down(south) up(north) + and right(west), +the same way as vi cursor movement keys are situated on keyboard.
+
+

+

+Command-Line +Name:    -zoombutton
+ Database Name:    zoomButton
+ Database Class:    none
+ +

+ +
Specifies +name of button, which is used to initiate zoom operation on
+
canvas. (usially +via zoom ) widget command. Planchet controls its state, disabling it, if +coordinate system is not defined. It should exist before it passed to planchet. +
+
+

+

+Command-Line Name:    -unzoombuttons
+ Database Name:    unzoomButtons
+ Database +Class:    none
+ +

+ +
Specifies list of buttons, which are used to perform various +unzoom operations
+
(like unzoom or limits default widget commands). Planchet +controls their state, disabling them if such operations are impossible. +
+
+

+

+Command-Line Name:    -shiftbuttons
+ Database Name:    shiftButtons
+ Database +Class:    none
+ +

+ +
Specifies list of four buttons for perform shift operation +on planchet.
+
Buttons are specified in following order left(west) down(south) +up(north) + and right(west), the same way as vi cursor movement keys are +situated on keyboard. This buttons should be either all be specified or +all be empty, in which case list of four empty elements should be passed. +Planchet not only controls state of buttons, but also redefines their +commands.
+
+

+

+Command-Line Name:    -projection
+ Database Name:    projection
+ Database +Class:    none
+ +

+ +
Specifies Fgis projection object which is used to convert +chartographic
+
coordinates of planchet into geographic (latitude and +longitude) and vice versa.
+
+

+

+In addition to these all options of canvas + widget are supported. +

INTRODUCTION

+

+The planchet command creates a new +window (given by the pathName argument and makes it into planchet widget. +

+ Additional options, described above, can be given to control its behavoir. +Currently they could be specified only in command line, not in option +database, but it shoudl change in future.

+ planchet command returns its +pathName argument. At the time this command is invoked, there must not +exist a window, named pathName , but pathName 's parent must exist. planchet + command also creates new Tcl command named pathName which can be used +to control widget.

+

+ Planchet widget have all behavoir supported by Tk +canvas widget, but, in addition it could have chartographic coordinate +system and able to visualize and manipulate maps.

+ +

COORDINATE SYSTEM

+

+ +Planchet coordinate system is real-world coordinate system. Its coordinates +should be in meters of earth surface, not in pixels, millimeters or other +map sheet or screen-related units. It can be defined either explicitely +via limits widget command, or implicitely, when first map is shown in +planchet.

+ There are special commands which allow to recalculate from map +(realword) coordinates to screen coordinates. Screen coordinate system +of planchet is same as of canvas. +

LAYERS

+Planchet can visualize maps, +which are represented as Fgis layer objects. There are two ways of display +layer - as base layer or as ovelay.

+Base layers are opaque, they are typically +raster layers, shown by colors. There can be only one base layer in plachet +in given time. If legbox helper widget is defined, and legend for base +layer is drawable, it would be displayed in this widget. Several layer +types couldn't be displayed as base layers.

+

+Overlay layers are transparent, +although visible. There can be several overlay layers in planchet at given +time. Any layer can be displayed as overlay.

+When first layer is displayed +in planchet, with undefined coordinate system, coordinate system limits +for planchet are got from limits of layer. If layer cannot provide this +information, it causes an error.

+ +

HELPER WIDGETS

+

+ Planchet can be accompanied +with several other widgets, which are used to interact with user. If this +widgets are passed to planchet via commandline options (or via widget +configure ) command, it can control them automatically and disable them, +if corresponding action is impossible. See OPTIONS ABOVE .

+ +

SCALE INDICATION +

+

+ There are two traditional ways of scale indication - numerical and graphical. +As numerical indication, -scalevar option of planchet widget allows to +specfy Tcl global variable, which would always hold current value of map +scale.

+As graphical representation of scale, planchet can display scale +ruler which shows how some realword distance is visible in planchet.

+ + +

LOOK FEATURE

+

+ Planchet allows to collect information from several layers +in given point. By default it pops up window with this information on right +button click. Set of layers which included in this information is called +look list .

+ +

WIDGET COMMAND

+

+

+ The planchet command creates a new Tcl command +whose name is pathName . This command can be used to invoke various operaitons +on the widget. It has following general form:

+ pathName option ?arg arg +.. ?
+

+ Option and the arg s determine the exact behavior of the command. +Planchet supports all widget commands, defined for canvas widget and +following special commands, specific to planchet: +
+ +
pathName clear
+
Removes +all layers from planchet, and from look list and unsets coordinate system +
+ +
pathName cget option
+
Returns value of specified configuration option. +In addition to standard options and widget specific options, supports +all options of canvas widget. Several internal variables can also be obtained +this way, but it is dirty and undocumented hack.
+ +
pathName configure option +arg ?option arg ...?
+
Allows to change value of one or more options.
+ +
pathName +fit x y
+
Returns 1 if point, given in real world coordinates is inside +current planchet limits, and 0 otherwise.
+ +
pathName hide pattern ?pattern...? +
+
Removes all layers which matches pattern from planchet.
+ +
pathName layers + ?pattern ?
+
Return list of all visible layers, either base or overlays, +which match given pattern. By default - all layers.
+ +
pathName limits
+
Used +to control limits of realword coordinate system. Can have one of following +form
+ +
limits
+
Without any arguments return list of four double values, +representing real world coordinates of window sides. They are given in +folowing order:

+ XLeft YBottom XRight YTop
+

+
+ + +
+ +
limits list
+
+ +
limits xleft +ybottom xright ytop
+
Given list of four double values or four double +values as separate arguments, sets planchet limits for this value. If -resizable + option is true and no coordinate system was defined before, adjusts width/height +ratio of planchet to reflect this ratio of given limits. Otherwise expands +given limits to have same width/height ratio as widget.
+
+

+ If directions +of axes of given limits doesn't match those of currently defined coordinate +system, silently reverts them. Therefore order of coordinates in insignificant, +once coordinate system is defined.

+ If coordinate system was defined, assumes +that zooming operation is performed and stores old limits in zoom stack +for subsequent unzoom operation. If scale of given limits is smaller, then +of some limits in zoom stack, discards all elements with scale larger +than given for unzoom operation shouldn't increase scale. Nevertheless initial +limits are never discarded this way. +

+ +
limits default
+
Clears zoom stack +and restores coordinate limits to their initial values.
+
+ + +
+ +
pathName look +
+
Controls LOOK FEATURE of planchet. Can have one of following forms +
+ +
look add layer
+
adds layer to look list.
+ +
look list ?pattern ?
+
Returns +list of layers in look list, which match pattern. By default all layers +
+ +
look remove pattern
+
removes layers which match pattern from look list +
+ +
look remove all
+
clears look list entirely
+ +
look x y ?-titled|-list|-raw ? +
+
return list of information for all layers in look list at given point. +If -titled option is specified, each element in list is formatted string. +Otherwise it is two element list which first element - layer title, and +second - layer value. -raw option returns only values, without layer title +information.
+
+

+ Length of this list not neccesary matches length of look +list, becouse if some layers are undefined in given point, they do not +create list element. + +

+ +
pathName mapx x
+
+ +
pathName mapy
+
Given screen coordinate +in any form, acceptable by Tk, returns realword coordinate.
+ +
pathName print + ?option arg ...?
+
Wrapper around postscript command. Uses default Fgis font +mapping and print system, also widget default orientation. By default, +send output to default Fgis printer using command, defined in fgis configuration +file.
+
+

+ Following options are supported:

-colormode mode Same as colormode + option in canvas postscript command. +
+ +
-file filename
+
Write postscript +representation of planchet into given file, instead of piping it to print +command.
+ +
-fontmap variable
+
array used to map screen fonts to postscript +fonts. See canvas postscript command for more information.
+ +
-printer printername +
+
Overrides default printer, specified in fgis.rc file.
+
+
+ +
+ +
pathName ruler +?on|off?
+
Controls scale ruler.
+ +
pathName scale ?denominator ?
+
With no +arguments returns current scale denominator. If denominator is given, +adjust coordinate limits so that scale would be as specified and center +point of widget would have same realworld coordinates as before.
+
+

+ If any +other arguments are specified, behaves as canvas widget scale command. +

+ +

+ +
pathName scrx x
+
+ +
pathName scry y
+
Given realworld coordinate, returns +screen coordinate in pixels.
+ +
pathName setstatus
+
Displays message if -statusline + helper widget, if defined, otherwise does nothing. Can have one of two +form:
+ +
setstatus message
+
displays message as specified
+ +
setstatus x y +
+
Displays given coordinates. If no projection defined, they would be displayed +using Tcl format command with value of -coordformat option as first argument. +Otherwise they would be displayed using format object command of current +projection.
+
+ + +
+ +
pathName shift direction
+
Changes current coordinate limits +so that current view shifts in specified direction by share of corresponding +widget size, specified by -shiftfactor option.
+ +
pathName show layer ?-base +|-overlay ?
+
Displays specified layer. If neither -base nor -overlay is specifed, +shows layer as base if no base layer currently present and layer can be +displayed as base. Otherwise displays it as overlay.
+ +
pathName unzoom
+
Pops +last coordinate limits from zoom stack
+ +
pathName zoom ? x y ? x y ?? +
+
Initiates interactive zoom operation. If no coordinates are specified, +prompts user to pick both corners of rectangle to display. If one pair +is specified, prompts only for second pair. With two pairs just converts +values from canvas to realworld coordinates and performs limits command +on them.

+ pathName zoom cancel
+

+
+ + can be used to abort interactive zoom +operation currently in progress.

+ pathName zoom cancel
+

+ can be used +to abort interactive zoom operation currently in progress. +

SEE ALSO

+layer(n) + + +

BUGS

+No care taken to do something useful if interactive zoom operation +is performed on two planchets simulateously.

+

+

+

+

+ +


+Table of Contents

+

+