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comments, key words, predefined symbols, class members & methods, functions & classes
# POINTSEL.SML -
# View ToolScript
# Allows user to select and highlight a vector point.
# Authors: Mark Smith and Randy Smith
# Most recent revision: 6 May 2008
# Requires version 2007:73 or later of the TNT products
# The following symbols are predefined
# class GRE_VIEW View {use to access the view the tool script is attached to}
# class GRE_GROUP Group {use to access the group being viewed if the script is run from a group view}
# class GRE_LAYOUT Layout {use to access the layout being viewed if the script is run from a layout view}
# numeric ToolIsActive Will be 0 if tool is inactive or 1 if tool is active
#
# The following values are also predefined and are valid when the various On...()
# functions are called which deal with pointer and keyboard events.
# numeric PointerX Pointer X coordinate within view in pixels
# numeric PointerY Pointer Y coordinate within view in pixels
# numeric ShiftPressed 1 if <shift> key being pressed or 0 if not
# numeric CtrlPressed 1 if <ctrl> key being pressed or 0 if not
# numeric LeftButtonPressed 1 if left pointer button pressed or 0 if not
# numeric RightButtonPressed 1 if right pointer button pressed or 0 if not
# numeric MiddleButtonPressed 1 if middle pointer button pressed or 0 if not
### GLOBAL VARIABLES
class GRE_LAYER_VECTOR vectorLayer;
class RVC_VECTOR targetVector;
class GRE_GROUP activegroup;
class RVC_GEOREFERENCE vecGeoref;
###################################################################################
############## USER-DEFINED FUNCTIONS AND PROCEDURES ##########################
###################################################################################
# Checks layer to see if it is valid.
func checkLayer()
{
local numeric valid = true;
# Get names layers if usable. If not output error messages.
# Get name of active layer if it is usable. If not output an error message.
if ( activegroup.ActiveLayer.Type == "" )
{
PopupMessage( "Group has no layers!" );
valid = false;
}
else if ( activegroup.ActiveLayer.Type == "Vector" )
{
vectorLayer = activegroup.ActiveLayer;
DispGetVectorFromLayer( targetVector, vectorLayer );
targetVector.GetDefaultGeoref(vecGeoref);
if ( targetVector.$Info.NumPoints < 1 ) {
PopupMessage("No points!");
valid = false;
}
}
else {
PopupMessage( "Not a vector!" );
valid = false;
}
return valid;
} # end of checkLayer();
### Callback for when the active layer changes.
proc cbLayer()
{
checkLayer();
}
# Callback for when the active group changes.
proc cbGroup() {
activegroup = Layout.ActiveGroup;
WidgetAddCallback(activegroup.LayerSelectedCallback, cbLayer);
}
##################################################################################
# The following script functions will be called (if used in the script) when
# the appropriate action or event occurs as described in the comments before each.
# To use a function, uncomment the lines containing the 'func' definition
# and ending brace '}' by removing the leftmost '#' on the line and add the
# function code between the two lines.
# Called when user presses 'left' pointer/mouse button.
proc OnLeftButtonPress ()
{
# If the selected layer is not valid, don't do anything.
if ( checkLayer() ) {
# Set local variables
local class POINT2D point;
local numeric elementNum;
local class TRANS2D_MAPGEN trans; # coordinate transformation parameters
# Check point.
point.x = PointerX;
point.y = PointerY;
# convert point position from screen coordinates to map coordinates for the targetVector
trans = View.GetTransViewToScreen(1); # transformation from screen to view coordinates
point = trans.ConvertPoint2DFwd(point);
trans = View.GetTransMapToView(vecGeoref.GetCoordRefSys(), 1); # transformation from view to layer map coordinates
point = trans.ConvertPoint2DFwd(point);
elementNum = FindClosestPoint( targetVector, point.x, point.y, GetLastUsedGeorefObject( targetVector ) );
if (elementNum > 0)
vectorLayer.Point.HighlightSingle( elementNum );
}
} # end of OnLeftButtonPress
# Called the first time the tool is activated.
# If the tool implements a dialog it should be created (but not displayed) here.
proc OnInitialize () {
if (Layout) {
WidgetAddCallback( Layout.GroupSelectedCallback, cbGroup );
activegroup = Layout.ActiveGroup;
}
else
activegroup = Group;
PopupMessage("Left-click in the View to select the nearest point.");
} # end of OnInitialize
# Called when tool is activated.
# If the tool implements a dialog it should be "managed" (displayed) here.
proc OnActivate ()
{
checkLayer();
} # end of OnActivate
# Called when tool is deactivated (usually when switching to another tool).
# If the tool implements a dialog it should be "unmanaged" (hidden) here.
proc OnDeactivate ()
{
if (activegroup.ActiveLayer.Type == "Vector") then
activegroup.ActiveLayer.UnhighlightAllElements();
} # end of OnDeactivate
# Called when tool is to be 'suspended' during a redraw operation.
# proc OnSuspend () {
# } # end of OnSuspend
# Called when tool is to be 'resumed' after a redraw operation.
# If the tool displays any graphics they should be updated by this function.
# proc OnResume () {
# } # end of OnResume
# Called when user presses 'right' pointer/mouse button.
# proc OnRightButtonPress () {
# } # end of OnRightButtonPress
# Called when user presses 'middle' pointer/mouse button.
# proc OnMiddleButtonPress () {
# } # end of OnMiddleButtonPress
# Called when user releases 'left' pointer/mouse button.
# proc OnLeftButtonRelease () {
# } # end of OnLeftButtonRelease
# Called when user releases 'right' pointer/mouse button.
# proc OnRightButtonRelease () {
# } # end of OnRightButtonRelease
# Called when user releases 'middle' pointer/mouse button.
# proc OnMiddleButtonRelease () {
# } # end of OnMiddleButtonRelease
# Called when user moves cursor if no button being pressed
# proc OnPointerMoveNoButton () {
# } # end of OnPointerMoveNoButton
# Called when user moves cursor while holding down button
# proc OnPointerMoveWithButton () {
# } # end of OnPointerMoveWithButton
# Called when cursor enters window associated with view.
# proc OnEnterWindow () {
# } # end of OnEnterWindow
# Called when cursor leaves window associated with view.
# proc OnLeaveWindow () {
# } # end of OnLeaveWindow
# Called when user presses 'key' on keyboard.
# proc OnKeyPress (key) {
# } # end of OnKeyPress
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