/// <summary>
/// Paints tooltip for a single control.
/// </summary>
private void doPaintTooltip(Graphics g, Font f, TooltipToPaint ttp)
{
int width = AbsRect.Width;
int height = AbsRect.Height;
// Painting children will have set all sorts of clip and transform
g.ResetClip();
g.ResetTransform();
// This will be bubble's rectangle, and the polygon representing the needle.
Rectangle brect;
Point[] points;
// This, the text's inside the bubble
Rectangle trect;
// Measure tooltip text as if we had all the width in the world (well, within canvas at least)
g.TextRenderingHint = TextRenderingHint.AntiAlias;
StringFormat sf = StringFormat.GenericDefault;
SizeF szF = g.MeasureString(ttp.TTI.Tooltip.Text, f, width - 2 * tooltipPadding);
Size sz = new Size((int)Math.Ceiling(szF.Width), (int)Math.Ceiling(szF.Height));
// Tooltip is at the north
if (ttp.TTI.Tooltip.TooltipLocation == TooltipLocation.North)
{
// Look at tooltip's left and right bounds: what control wishes, and how much space we have in window.
// We assume control's smart enough to request a bubble that fits vertically. We control for breadth.
int left, right;
// Center aligned over needle
if (ttp.TTI.Tooltip.TopOrSide == int.MinValue)
{
left = ttp.TTI.Tooltip.NeedlePos + ttp.Ctrl.AbsLeft - sz.Width / 2 - tooltipPadding;
right = left + sz.Width + 2 * tooltipPadding;
}
// Right aligned
else if (ttp.TTI.Tooltip.TopOrSide < 0)
{
int x = -ttp.TTI.Tooltip.TopOrSide;
right = ttp.Ctrl.AbsLeft + x;
left = right - sz.Width - 2 * tooltipPadding;
}
// Left aligned
else
{
left = ttp.Ctrl.AbsLeft + ttp.TTI.Tooltip.TopOrSide;
right = left + sz.Width + 2 * tooltipPadding;
}
// Fix left and right so they're never outside canvas
if (right > width) { left -= (right - width); right = width; }
if (left < 0) { right += -left; left = 0; }
// If this is less space than text's desired width, re-measure
// May need more lines
if (right - left - 2 * tooltipPadding < sz.Width)
{
szF = g.MeasureString(ttp.TTI.Tooltip.Text, f, right - left);
sz = new Size((int)Math.Ceiling(szF.Width), (int)Math.Ceiling(szF.Height));
}
// So, we got our rectangles
brect = new Rectangle(
left,
ttp.Ctrl.AbsTop - ttp.TTI.Tooltip.NeedleHeight - sz.Height - tooltipPadding,
sz.Width + 2 * tooltipPadding, sz.Height + tooltipPadding);
trect = brect;
trect.X += tooltipPadding;
trect.Y += tooltipPadding / 2;
trect.Width -= 2 * tooltipPadding;
trect.Height -= tooltipPadding / 2;
// Bubble with needle
int npos = ttp.TTI.Tooltip.NeedlePos;
int nheight = ttp.TTI.Tooltip.NeedleHeight;
points = new Point[]
{
new Point(ttp.Ctrl.AbsLeft + npos, ttp.Ctrl.AbsTop),
new Point(ttp.Ctrl.AbsLeft + npos + nheight, ttp.Ctrl.AbsTop - nheight),
new Point(brect.Right, brect.Bottom),
new Point(brect.Right, brect.Top),
new Point(brect.Left, brect.Top),
new Point(brect.Left, brect.Bottom),
new Point(ttp.Ctrl.AbsLeft + npos - nheight, ttp.Ctrl.AbsTop - nheight),
new Point(ttp.Ctrl.AbsLeft + npos, ttp.Ctrl.AbsTop),
};
}
// Tooltip is at the west
else if (ttp.TTI.Tooltip.TooltipLocation == TooltipLocation.West)
{
// Look at tooltip's top and bottom bounds: what control wishes, and how much space we have in window.
// We assume control's smart enough to request a bubble that fits horizontally. We control for height.
int top = 0;
int bottom = 0;
// Center aligned next to needle
if (ttp.TTI.Tooltip.TopOrSide == int.MinValue)
{
top = ttp.TTI.Tooltip.NeedlePos + ttp.Ctrl.AbsTop - sz.Height / 2 - tooltipPadding / 2;
bottom = top + sz.Height + tooltipPadding;
}
// Top aligned
else if (ttp.TTI.Tooltip.TopOrSide > 0)
{
int y = ttp.TTI.Tooltip.TopOrSide;
top = ttp.Ctrl.AbsTop + y;
bottom = top + sz.Height + tooltipPadding;
}
// Fix top and bottom so they're never outside canvas
if (bottom > height) { bottom = height; top = bottom - sz.Height; }
if (top < 0) { top = 0; bottom = top + height; }
// So, we got our rectangles
brect = new Rectangle(
ttp.Ctrl.AbsLeft - ttp.TTI.Tooltip.NeedleHeight - sz.Width - 2 * tooltipPadding, top,
sz.Width + 2 * tooltipPadding, sz.Height + tooltipPadding);
trect = brect;
trect.X += tooltipPadding;
trect.Y += tooltipPadding / 2;
trect.Width -= 2 * tooltipPadding;
trect.Height -= tooltipPadding / 2;
// Bubble with needle
int npos = ttp.TTI.Tooltip.NeedlePos;
int nwidth = ttp.TTI.Tooltip.NeedleHeight;
points = new Point[]
{
new Point(ttp.Ctrl.AbsLeft, ttp.Ctrl.AbsTop + npos),
new Point(ttp.Ctrl.AbsLeft - nwidth, ttp.Ctrl.AbsTop + npos - nwidth),
new Point(brect.Right, brect.Top),
new Point(brect.Left, brect.Top),
new Point(brect.Left, brect.Bottom),
new Point(brect.Right, brect.Bottom),
new Point(brect.Right, ttp.Ctrl.AbsTop + npos + nwidth),
new Point(ttp.Ctrl.AbsLeft, ttp.Ctrl.AbsTop + npos),
};
}
// TO-DO: tooltip at east. Will do when needed.
else
{
// These rectangles will crash FillPolygon below. Goed zo.
brect = new Rectangle(0, 0, 0, 0);
trect = new Rectangle(0, 0, 0, 0);
points = new Point[0];
}
// Draw bubble
g.SmoothingMode = SmoothingMode.HighQuality;
float alfa = ((float)ZenParams.TooltipMaxAlfa) * ttp.Strength;
using (Brush b = new SolidBrush(Color.FromArgb((int)alfa, ZenParams.TooltipBackColor)))
{
g.FillPolygon(b, points);
}
// Write text
alfa = 255F * ttp.Strength;
using (Brush b = new SolidBrush(Color.FromArgb((int)alfa, ZenParams.TooltipTextColor)))
{
g.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;
g.DrawString(ttp.TTI.Tooltip.Text, f, b, trect);
}
}
/// <summary>
/// Paints tooltip for a single control.
/// </summary>
private void doPaintTooltip(Graphics g, Font f, TooltipToPaint ttp)
{
int width = AbsRect.Width;
int height = AbsRect.Height;
// Painting children will have set all sorts of clip and transform
g.ResetClip();
g.ResetTransform();
// This will be bubble's rectangle, and the polygon representing the needle.
Rectangle brect;
Point[] points;
// This, the text's inside the bubble
Rectangle trect;
// Measure tooltip text as if we had all the width in the world (well, within canvas at least)
g.TextRenderingHint = TextRenderingHint.AntiAlias;
StringFormat sf = StringFormat.GenericDefault;
SizeF szF = g.MeasureString(ttp.TTI.Tooltip.Text, f, width - 2 * tooltipPadding);
Size sz = new Size((int)Math.Ceiling(szF.Width), (int)Math.Ceiling(szF.Height));
// Tooltip is at the north
if (ttp.TTI.Tooltip.TooltipLocation == TooltipLocation.North)
{
// Look at tooltip's left and right bounds: what control wishes, and how much space we have in window.
// We assume control's smart enough to request a bubble that fits vertically. We control for breadth.
int left, right;
// Center aligned over needle
if (ttp.TTI.Tooltip.TopOrSide == int.MinValue)
{
left = ttp.TTI.Tooltip.NeedlePos + ttp.Ctrl.AbsLeft - sz.Width / 2 - tooltipPadding;
right = left + sz.Width + 2 * tooltipPadding;
}
// Right aligned
else if (ttp.TTI.Tooltip.TopOrSide < 0)
{
int x = -ttp.TTI.Tooltip.TopOrSide;
right = ttp.Ctrl.AbsLeft + x;
left = right - sz.Width - 2 * tooltipPadding;
}
// Left aligned
else
{
left = ttp.Ctrl.AbsLeft + ttp.TTI.Tooltip.TopOrSide;
right = left + sz.Width + 2 * tooltipPadding;
}
// Fix left and right so they're never outside canvas
if (right > width)
{
left -= (right - width); right = width;
}
if (left < 0)
{
right += -left; left = 0;
}
// If this is less space than text's desired width, re-measure
// May need more lines
if (right - left - 2 * tooltipPadding < sz.Width)
{
szF = g.MeasureString(ttp.TTI.Tooltip.Text, f, right - left);
sz = new Size((int)Math.Ceiling(szF.Width), (int)Math.Ceiling(szF.Height));
}
// So, we got our rectangles
brect = new Rectangle(
left,
ttp.Ctrl.AbsTop - ttp.TTI.Tooltip.NeedleHeight - sz.Height - tooltipPadding,
sz.Width + 2 * tooltipPadding, sz.Height + tooltipPadding);
trect = brect;
trect.X += tooltipPadding;
trect.Y += tooltipPadding / 2;
trect.Width -= 2 * tooltipPadding;
trect.Height -= tooltipPadding / 2;
// Bubble with needle
int npos = ttp.TTI.Tooltip.NeedlePos;
int nheight = ttp.TTI.Tooltip.NeedleHeight;
points = new Point[]
{
new Point(ttp.Ctrl.AbsLeft + npos, ttp.Ctrl.AbsTop),
new Point(ttp.Ctrl.AbsLeft + npos + nheight, ttp.Ctrl.AbsTop - nheight),
new Point(brect.Right, brect.Bottom),
new Point(brect.Right, brect.Top),
new Point(brect.Left, brect.Top),
new Point(brect.Left, brect.Bottom),
new Point(ttp.Ctrl.AbsLeft + npos - nheight, ttp.Ctrl.AbsTop - nheight),
new Point(ttp.Ctrl.AbsLeft + npos, ttp.Ctrl.AbsTop),
};
}
// Tooltip is at the west
else if (ttp.TTI.Tooltip.TooltipLocation == TooltipLocation.West)
{
// Look at tooltip's top and bottom bounds: what control wishes, and how much space we have in window.
// We assume control's smart enough to request a bubble that fits horizontally. We control for height.
int top = 0;
int bottom = 0;
// Center aligned next to needle
if (ttp.TTI.Tooltip.TopOrSide == int.MinValue)
{
top = ttp.TTI.Tooltip.NeedlePos + ttp.Ctrl.AbsTop - sz.Height / 2 - tooltipPadding / 2;
bottom = top + sz.Height + tooltipPadding;
}
// Top aligned
else if (ttp.TTI.Tooltip.TopOrSide > 0)
{
int y = ttp.TTI.Tooltip.TopOrSide;
top = ttp.Ctrl.AbsTop + y;
bottom = top + sz.Height + tooltipPadding;
}
// Fix top and bottom so they're never outside canvas
if (bottom > height)
{
bottom = height; top = bottom - sz.Height;
}
if (top < 0)
{
top = 0; bottom = top + height;
}
// So, we got our rectangles
brect = new Rectangle(
ttp.Ctrl.AbsLeft - ttp.TTI.Tooltip.NeedleHeight - sz.Width - 2 * tooltipPadding, top,
sz.Width + 2 * tooltipPadding, sz.Height + tooltipPadding);
trect = brect;
trect.X += tooltipPadding;
trect.Y += tooltipPadding / 2;
trect.Width -= 2 * tooltipPadding;
trect.Height -= tooltipPadding / 2;
// Bubble with needle
int npos = ttp.TTI.Tooltip.NeedlePos;
int nwidth = ttp.TTI.Tooltip.NeedleHeight;
points = new Point[]
{
new Point(ttp.Ctrl.AbsLeft, ttp.Ctrl.AbsTop + npos),
new Point(ttp.Ctrl.AbsLeft - nwidth, ttp.Ctrl.AbsTop + npos - nwidth),
new Point(brect.Right, brect.Top),
new Point(brect.Left, brect.Top),
new Point(brect.Left, brect.Bottom),
new Point(brect.Right, brect.Bottom),
new Point(brect.Right, ttp.Ctrl.AbsTop + npos + nwidth),
new Point(ttp.Ctrl.AbsLeft, ttp.Ctrl.AbsTop + npos),
};
}
// TO-DO: tooltip at east. Will do when needed.
else
{
// These rectangles will crash FillPolygon below. Goed zo.
brect = new Rectangle(0, 0, 0, 0);
trect = new Rectangle(0, 0, 0, 0);
points = new Point[0];
}
// Draw bubble
g.SmoothingMode = SmoothingMode.HighQuality;
float alfa = ((float)ZenParams.TooltipMaxAlfa) * ttp.Strength;
using (Brush b = new SolidBrush(Color.FromArgb((int)alfa, ZenParams.TooltipBackColor)))
{
g.FillPolygon(b, points);
}
// Write text
alfa = 255F * ttp.Strength;
using (Brush b = new SolidBrush(Color.FromArgb((int)alfa, ZenParams.TooltipTextColor)))
{
g.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;
g.DrawString(ttp.TTI.Tooltip.Text, f, b, trect);
}
}
