/// <summary>
/// Returns the number of inches represented by a given unit
/// </summary>
/// <param name="unit">The unit to use</param>
/// <returns>The number of inches</returns>
public static double InchesPerUnit(MS_UNITS unit)
{
switch (unit)
{
case MS_UNITS.MS_DD:
return(4374754);
case MS_UNITS.MS_FEET:
return(12);
case MS_UNITS.MS_INCHES:
return(1);
case MS_UNITS.MS_KILOMETERS:
return(39370.1);
case MS_UNITS.MS_METERS:
return(39.3701);
case MS_UNITS.MS_MILES:
return(63360.0);
default:
return(1);
}
}
/// <summary>
/// Retrieve the current unit precision of the map based on the given unit.
/// </summary>
/// <param name="map">The given unit.</param>
/// <returns>The unit precision of the given unit.</returns>
public static int GetUnitPrecision(MS_UNITS unit)
{
switch (unit)
{
case MS_UNITS.MS_DD:
return(5);
case MS_UNITS.MS_FEET:
return(0);
case MS_UNITS.MS_INCHES:
return(0);
case MS_UNITS.MS_KILOMETERS:
return(3);
case MS_UNITS.MS_METERS:
return(0);
case MS_UNITS.MS_MILES:
return(3);
case MS_UNITS.MS_PERCENTAGES:
return(2);
case MS_UNITS.MS_PIXELS:
return(0);
}
return(0);
}
/// <summary>
/// Update the extent parameters according to the map.extent parameters.
/// </summary>
private void UpdateExtentValues()
{
if (comboBoxUnits.SelectedItem != null)
{
mapunits = (MS_UNITS)comboBoxUnits.SelectedItem;
}
else
{
mapunits = map.units;
}
unitPrecision = MapUtils.GetUnitPrecision(mapunits);
textBoxX.Text = Convert.ToString(Math.Round((map.extent.maxx + map.extent.minx) / 2, unitPrecision));
textBoxY.Text = Convert.ToString(Math.Round((map.extent.maxy + map.extent.miny) / 2, unitPrecision));
labelUnit2.Text = MapUtils.GetUnitName(mapunits);
textBoxScale.Text = Convert.ToString(Convert.ToInt64(map.scaledenom));
unitPrecision = MapUtils.GetUnitPrecision(mapunits);
labelUnit1.Text = MapUtils.GetUnitName(mapunits);
double zoom = (map.extent.maxx - map.extent.minx);
if (mapunits != map.units)
{
zoom = zoom * MapUtils.InchesPerUnit(map.units) / MapUtils.InchesPerUnit(mapunits);
}
textBoxZoomWidth.Text = Convert.ToString(Math.Round(zoom, unitPrecision));
}
/// <summary>
/// Retrieve the current unit name of the given unit.
/// </summary>
/// <param name="map">The given unit.</param>
/// <returns>The current unit name of the given unit.</returns>
public static string GetUnitName(MS_UNITS unit)
{
switch (unit)
{
case MS_UNITS.MS_DD:
return("°");
case MS_UNITS.MS_FEET:
return("ft");
case MS_UNITS.MS_INCHES:
return("in");
case MS_UNITS.MS_KILOMETERS:
return("km");
case MS_UNITS.MS_METERS:
return("m");
case MS_UNITS.MS_MILES:
return("mi");
case MS_UNITS.MS_PERCENTAGES:
return("%");
case MS_UNITS.MS_PIXELS:
return("px");
}
return("");
}
/// <summary>
/// Triggers a Zoom Chnaged event
/// </summary>
private void RaiseZoomChanged()
{
MS_UNITS mapunits = map.units;
int unitPrecision = MapUtils.GetUnitPrecision(mapunits);
double zoom = (map.extent.maxx - map.extent.minx);
if (mapunits != map.units)
{
zoom = zoom * MapUtils.InchesPerUnit(map.units) / MapUtils.InchesPerUnit(mapunits);
}
target.RaiseZoomChanged(this, Math.Round(zoom, unitPrecision), map.scaledenom);
}
/// <summary>
/// Refresh the controls according to the underlying object.
/// </summary>
public void RefreshView()
{
mapunits = map.units;
unitPrecision = MapUtils.GetUnitPrecision(mapunits);
textBoxX.Text = Convert.ToString(Math.Round((map.extent.maxx + map.extent.minx) / 2, unitPrecision));
textBoxY.Text = Convert.ToString(Math.Round((map.extent.maxy + map.extent.miny) / 2, unitPrecision));
labelUnit2.Text = MapUtils.GetUnitName(mapunits);
textBoxScale.Text = Convert.ToString(Convert.ToInt32(map.scaledenom));
labelUnit1.Text = MapUtils.GetUnitName(mapunits);
double zoom = (map.extent.maxx - map.extent.minx);
if (mapunits != map.units)
zoom = zoom * MapUtils.InchesPerUnit(map.units) / MapUtils.InchesPerUnit(mapunits);
textBoxZoomWidth.Text = Convert.ToString(Math.Round(zoom, unitPrecision));
}
/// <summary>
/// Refresh the controls according to the underlying object.
/// </summary>
public void RefreshView()
{
mapunits = map.units;
unitPrecision = MapUtils.GetUnitPrecision(mapunits);
textBoxX.Text = Convert.ToString(Math.Round((map.extent.maxx + map.extent.minx) / 2, unitPrecision));
textBoxY.Text = Convert.ToString(Math.Round((map.extent.maxy + map.extent.miny) / 2, unitPrecision));
labelUnit2.Text = MapUtils.GetUnitName(mapunits);
textBoxScale.Text = Convert.ToString(Convert.ToInt32(map.scaledenom));
labelUnit1.Text = MapUtils.GetUnitName(mapunits);
double zoom = (map.extent.maxx - map.extent.minx);
if (mapunits != map.units)
{
zoom = zoom * MapUtils.InchesPerUnit(map.units) / MapUtils.InchesPerUnit(mapunits);
}
textBoxZoomWidth.Text = Convert.ToString(Math.Round(zoom, unitPrecision));
}
/// <summary>
/// Constructs a new MapControl object.
/// </summary>
public MapControl()
{
InitializeComponent();
InputMode = InputModes.Pan;
dragRect = new Rectangle(0,0,0,0);
dragging = false;
selectionBrush = new SolidBrush(Color.FromArgb(75, Color.Gray));
selectionPen = new Pen(Color.Black,1);
borderPen = new Pen(Color.Black, 1);
border = false;
drawMessage = "The map hasn't been initialised yet.";
gap = 10;
unitPrecision = 4;
unitName = "";
mapunits = MS_UNITS.MS_METERS;
a11 = a13 = a21 = a23 = 0;
this.SetStyle(ControlStyles.AllPaintingInWmPaint |
ControlStyles.UserPaint | ControlStyles.DoubleBuffer, true);
}
/// <summary>
/// Update the unit values according to the mapObj settings.
/// </summary>
public void UpdateUnitValues()
{
mapunits = map.units;
unitPrecision = MapUtils.GetUnitPrecision(map.units);
string newUnit = MapUtils.GetUnitName(mapunits);
if (unitName != newUnit)
{
unitName = newUnit;
RaiseZoomChanged();
}
}
/// <summary>
/// Returns the number of inches represented by a given unit
/// </summary>
/// <param name="unit">The unit to use</param>
/// <returns>The number of inches</returns>
public static double InchesPerUnit(MS_UNITS unit)
{
switch (unit)
{
case MS_UNITS.MS_DD:
return 4374754;
case MS_UNITS.MS_FEET:
return 12;
case MS_UNITS.MS_INCHES:
return 1;
case MS_UNITS.MS_KILOMETERS:
return 39370.1;
case MS_UNITS.MS_METERS:
return 39.3701;
case MS_UNITS.MS_MILES:
return 63360.0;
default:
return 1;
}
}
/// <summary>
/// Retrieve the current unit precision of the map based on the given unit.
/// </summary>
/// <param name="map">The given unit.</param>
/// <returns>The unit precision of the given unit.</returns>
public static int GetUnitPrecision(MS_UNITS unit)
{
switch (unit)
{
case MS_UNITS.MS_DD:
return 5;
case MS_UNITS.MS_FEET:
return 0;
case MS_UNITS.MS_INCHES:
return 0;
case MS_UNITS.MS_KILOMETERS:
return 3;
case MS_UNITS.MS_METERS:
return 0;
case MS_UNITS.MS_MILES:
return 3;
case MS_UNITS.MS_PERCENTAGES:
return 2;
case MS_UNITS.MS_PIXELS:
return 0;
}
return 0;
}
/// <summary>
/// Retrieve the current unit name of the given unit.
/// </summary>
/// <param name="map">The given unit.</param>
/// <returns>The current unit name of the given unit.</returns>
public static string GetUnitName(MS_UNITS unit)
{
switch (unit)
{
case MS_UNITS.MS_DD:
return "°";
case MS_UNITS.MS_FEET:
return "ft";
case MS_UNITS.MS_INCHES:
return "in";
case MS_UNITS.MS_KILOMETERS:
return "km";
case MS_UNITS.MS_METERS:
return "m";
case MS_UNITS.MS_MILES:
return "mi";
case MS_UNITS.MS_PERCENTAGES:
return "%";
case MS_UNITS.MS_PIXELS:
return "px";
}
return "";
}
/// <summary>
/// Update the extent parameters according to the map.extent parameters.
/// </summary>
private void UpdateExtentValues()
{
if (comboBoxUnits.SelectedItem != null)
mapunits = (MS_UNITS)comboBoxUnits.SelectedItem;
else
mapunits = map.units;
unitPrecision = MapUtils.GetUnitPrecision(mapunits);
textBoxX.Text = Convert.ToString(Math.Round((map.extent.maxx + map.extent.minx) / 2, unitPrecision));
textBoxY.Text = Convert.ToString(Math.Round((map.extent.maxy + map.extent.miny) / 2, unitPrecision));
labelUnit2.Text = MapUtils.GetUnitName(mapunits);
textBoxScale.Text = Convert.ToString(Convert.ToInt64(map.scaledenom));
unitPrecision = MapUtils.GetUnitPrecision(mapunits);
labelUnit1.Text = MapUtils.GetUnitName(mapunits);
double zoom = (map.extent.maxx - map.extent.minx);
if (mapunits != map.units)
zoom = zoom * MapUtils.InchesPerUnit(map.units) / MapUtils.InchesPerUnit(mapunits);
textBoxZoomWidth.Text = Convert.ToString(Math.Round(zoom, unitPrecision));
}
