int MeasureTicksSize(TickEnumerator e, AxisDimension ad)
{
int max = 0;
Pango.Layout layout = new Pango.Layout (this.PangoContext);
layout.FontDescription = Pango.FontDescription.FromString ("Tahoma 8");
double start = GetStart (ad);
double end = GetEnd (ad);
e.Init (GetOrigin (ad));
while (e.CurrentValue > start)
e.MovePrevious ();
for ( ; e.CurrentValue <= end; e.MoveNext ())
{
int tw = 0, th = 0;
layout.SetMarkup (e.CurrentLabel);
layout.GetPixelSize (out tw, out th);
if (ad == AxisDimension.X) {
if (th > max)
max = th;
} else {
if (tw > max)
max = tw;
}
}
return max;
}
void DrawTicks(Gdk.Window win, Gdk.GC gc, TickEnumerator e, AxisPosition pos, AxisDimension ad, int tickSize, bool showLabels)
{
int rwidth, rheight;
win.GetSize (out rwidth, out rheight);
Pango.Layout layout = null;
if (showLabels) {
layout = new Pango.Layout (this.PangoContext);
layout.FontDescription = Pango.FontDescription.FromString ("Tahoma 8");
}
bool isX = pos == AxisPosition.Top || pos == AxisPosition.Bottom;
bool isTop = pos == AxisPosition.Top || pos == AxisPosition.Right;
double start = GetStart (ad);
double end = GetEnd (ad);
e.Init (GetOrigin (ad));
while (e.CurrentValue > start)
e.MovePrevious ();
int lastPosLabel;
int lastPos;
int lastTw = 0;
if (isX) {
lastPosLabel = reverseXAxis ? left + width + MinLabelGapX : left - MinLabelGapX;
lastPos = left - minTickStep*2;
}
else {
lastPosLabel = reverseYAxis ? top - MinLabelGapY : rheight + MinLabelGapY;
lastPos = top + height + minTickStep*2;
}
for ( ; e.CurrentValue <= end; e.MoveNext ())
{
int px, py;
int tw = 0, th = 0;
int tick = tickSize;
GetPoint (e.CurrentValue, e.CurrentValue, out px, out py);
if (showLabels) {
layout.SetMarkup (e.CurrentLabel);
layout.GetPixelSize (out tw, out th);
}
if (isX) {
if (Math.Abs (px - lastPos) < minTickStep || px < left || px > left + width)
continue;
lastPos = px;
bool labelFits = false;
if ((Math.Abs (px - lastPosLabel) - (tw/2) - (lastTw/2)) >= MinLabelGapX) {
lastPosLabel = px;
lastTw = tw;
labelFits = true;
}
if (isTop) {
if (showLabels) {
if (labelFits)
win.DrawLayout (gc, px - (tw/2), top - AreaBorderWidth - th, layout);
else
tick = tick / 2;
}
win.DrawLine (gc, px, top, px, top + tick);
}
else {
if (showLabels) {
if (labelFits)
win.DrawLayout (gc, px - (tw/2), top + height + AreaBorderWidth, layout);
else
tick = tick / 2;
}
win.DrawLine (gc, px, top + height, px, top + height - tick);
}
}
else {
if (Math.Abs (lastPos - py) < minTickStep || py < top || py > top + height)
continue;
lastPos = py;
bool labelFits = false;
if ((Math.Abs (py - lastPosLabel) - (th/2) - (lastTw/2)) >= MinLabelGapY) {
lastPosLabel = py;
lastTw = th;
labelFits = true;
}
if (isTop) {
if (showLabels) {
if (labelFits)
win.DrawLayout (gc, left + width + AreaBorderWidth + 1, py - (th/2), layout);
else
tick = tick / 2;
}
win.DrawLine (gc, left + width, py, left + width - tick, py);
}
else {
if (showLabels) {
if (labelFits)
win.DrawLayout (gc, left - AreaBorderWidth - tw - 1, py - (th/2), layout);
else
tick = tick / 2;
}
win.DrawLine (gc, left, py, left + tick, py);
}
}
}
}