void _Render(IntPtr dc, RECT rUpdate)
{
Api.FillRect(dc, rUpdate, (IntPtr)(Api.COLOR_BTNFACE + 1));
using var g = Graphics.FromHdc(dc);
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
var font = NativeFont_.RegularCached(_dpi);
using var soFont = new GdiSelectObject_(dc, font);
Api.SetBkMode(dc, 1);
int textColor = Api.GetSysColor(Api.COLOR_BTNTEXT), textColorDisabled = Api.GetSysColor(Api.COLOR_GRAYTEXT);
rUpdate.Offset(0, _scroll.Offset);
for (int i = _scroll.Pos; i < _a.Count; i++)
{
var b = _a[i];
if (b.rect.bottom <= rUpdate.top)
{
continue;
}
if (b.rect.top >= rUpdate.bottom)
{
break;
}
var r = _ItemRect(b);
//g.DrawRectangleInset(Pens.BlueViolet, r);
if (b.IsSeparator)
{
r.Inflate(-_z.textPaddingX / 4, 0);
//r.left+=_z.check+_z.image;
r.top += (r.Height - _z.sepLine) / 2;
r.Height = _z.sepLine;
if (_z.theme != default)
{
Api.DrawThemeBackground(_z.theme, dc, 15, 0, r);
}
else
{
Api.DrawEdge(dc, ref r, Api.EDGE_ETCHED, Api.BF_TOP);
}
}
else
{
if (b.BackgroundColor != default)
{
using (var brush = new SolidBrush((Color)b.BackgroundColor)) g.FillRectangle(brush, r);
}
if (i == _iHot)
{
if ((textColor == 0 || b.TextColor != default) && b.BackgroundColor == default)
{
using (var brush = new SolidBrush(0xC0DCF3.ToColor_())) g.FillRectangle(brush, r);
}
using (var pen = new Pen(0x90C8F6.ToColor_(), _z.bBorder)) g.DrawRectangleInset(pen, r);
}
r.Inflate(-_z.bBorder, -_z.bBorder);
var r2 = r;
r.left += _z.check;
if (b.image2 != null)
{
g.DrawImage(b.image2, r.left + _z.textPaddingY, r.top + (r.Height - _z.image) / 2, _z.image, _z.image);
}
r.left += _z.image + _z.textPaddingX; r.right -= _z.textPaddingX + _z.submenu + _z.submenuMargin;
r.top += _z.textPaddingY; r.bottom -= _z.textPaddingY;
if (b.Hotkey != null)
{
Api.SetTextColor(dc, textColorDisabled);
var rh = r; rh.left += _z.xHotkeyStart;
Api.DrawText(dc, b.Hotkey, ref rh, c_tffHotkey);
}
Api.SetTextColor(dc, b.TextColor != default ? b.TextColor.ToBGR() : (b.IsDisabled ? textColorDisabled : textColor));
if (!b.Text.NE())
{
if (b.FontBold)
{
Api.SelectObject(dc, NativeFont_.BoldCached(_dpi));
}
r.Width = _z.xTextEnd;
Api.DrawText(dc, b.Text, ref r, _TfFlags(b));
if (b.FontBold)
{
Api.SelectObject(dc, font);
}
}
if (b.IsSubmenu)
{
_DrawControl(_z.zSubmenu, 16, b.IsDisabled ? 2 : 1, "➜", r2.right - _z.submenu, r.top, _z.submenu, r.Height);
}
if (b.IsChecked)
{
_DrawControl(_z.zCheck, 11, b.checkType == 1 ? (b.IsDisabled ? 2 : 1) : (b.IsDisabled ? 4 : 3), b.checkType == 1 ? "✔" : "●", r2.left, r.top, _z.check, r.Height);
}
void _DrawControl(SIZE z, int part, int state, string c, int x, int y, int width, int height)
{
if (_z.theme != default && z != default)
{
RECT r = new(x, r2.top + (r2.Height - z.height) / 2, z.width, z.height);
Api.DrawThemeBackground(_z.theme, dc, part, state, r);
}
else
{
RECT r = new(x, y, width, height);
Api.DrawText(dc, c, ref r, TFFlags.CENTER);
//cannot use DrawFrameControl(DFC_MENU, DFCS_MENUARROW etc), it draws with white background and too small when high DPI
}
}
}
}
}
SIZE _Measure(int maxWidth)
{
SIZE R = default;
_z?.Dispose();
_z = new _Metrics(this);
int buttonPlusX = (_z.bBorder + _z.textPaddingX) * 2 + _z.check + _z.image + _z.submenu + _z.submenuMargin;
int buttonPlusY = (_z.bBorder + _z.textPaddingY) * 2 + 1;
int maxTextWidth = maxWidth - buttonPlusX;
var font = NativeFont_.RegularCached(_dpi);
using var dc = new FontDC_(font);
int lineHeight = dc.MeasureEP(" ").height + buttonPlusY;
int maxHotkey = 0;
if (_z.hasHotkeys)
{
foreach (var b in _a)
{
if (b.Hotkey == null)
{
continue;
}
int wid = dc.MeasureDT(b.Hotkey, c_tffHotkey).width;
maxHotkey = Math.Max(maxHotkey, Math.Min(wid, maxTextWidth / 2));
}
}
int hotkeyPlus = lineHeight * 3 / 2; //space between text and hotkey
if (maxHotkey > 0)
{
maxTextWidth -= maxHotkey += hotkeyPlus;
}
int y = 0;
for (int i = 0; i < _a.Count; i++)
{
//note: to support multiline, wrap, underlines and tabs we have to use DrawText, not TextOut.
// DrawText(DT_CALCRECT) is slow. Very slow compared with GetTextExtentPoint32. Eg 100-300 ms for 1000 items. Depends on text length.
var b = _a[i];
SIZE z;
if (b.IsSeparator)
{
z = new(0, _z.separator);
}
else
{
var s = b.Text;
if (!s.NE())
{
if (b.FontBold)
{
Api.SelectObject(dc, NativeFont_.BoldCached(_dpi));
}
z = dc.MeasureDT(s, _TfFlags(b), maxTextWidth);
z.width = Math.Min(z.width, maxTextWidth);
if (b.FontBold)
{
Api.SelectObject(dc, font);
}
_z.xTextEnd = Math.Max(_z.xTextEnd, z.width);
z.width += buttonPlusX; z.height += buttonPlusY;
}
else
{
z = new(0, lineHeight);
}
}
b.rect = new(0, y, z.width, z.height);
y += z.height;
R.width = Math.Max(R.width, z.width);
R.height = Math.Max(R.height, y);
}
if (maxHotkey > 0)
{
R.width += maxHotkey;
_z.xHotkeyStart = _z.xTextEnd + hotkeyPlus;
}
foreach (var b in _a)
{
b.rect.right = R.width;
}
return(R);
}