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System.Windows.Forms: Choose a size that fits what we'll draw, close #58 #63

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System.Windows.Forms: Choose a size that fits what we'll draw, close #58 #63

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System.Windows.Forms: Choose a size that fits what we'll draw, close #58
sancheolz Nov 10, 2025
ec2065e
2 additional pixels have been removed to match the old behavior
sancheolz Nov 21, 2025
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20 changes: 15 additions & 5 deletions System.Windows.Forms/System.Windows.Forms/MonthCalendar.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -21,9 +21,6 @@
//
// Authors:
// John BouAntoun jba-mono@optusnet.com.au
//
// REMAINING TODO:
// - get the date_cell_size and title_size to be pixel perfect match of SWF

using System;
using System.Collections;
Expand Down Expand Up @@ -711,8 +708,21 @@ public Size SingleMonthSize {
int column_count = (ShowWeekNumbers) ? 8 : 7;
int row_count = 7; // not including the today date

// set the date_cell_size and the title_size
date_cell_size = new Size ((int) Math.Ceiling (1.8 * multiplier), multiplier);
// Calculate date_cell_size
int maxWidth = 0;
int maxHeight = 0;
DateTime dt = new DateTime(0, DateTimeKind.Utc);

for (int day = 0; day < 7; day++)
{
string dayStr = dt.AddDays(day).ToString("ddd");
Size textSize = TextRenderer.MeasureText(dayStr, this.Font);
maxWidth = Math.Max(maxWidth, textSize.Width);
maxHeight = Math.Max(maxHeight, textSize.Height);
}

date_cell_size = new Size(maxWidth, maxHeight);

title_size = new Size ((date_cell_size.Width * column_count), 2 * multiplier);

return new Size (column_count * date_cell_size.Width, row_count * date_cell_size.Height + title_size.Height);
Expand Down