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Paint.NET: Shortcuts, MouseWheel, Ruler Ticks,...


midora
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None of the following issues is in any way important. Just a list I collected for a while.

 

1) Shortcuts in menus

There is a small issue with OEM character shortcuts. I.E Ctrl++ does not work with a german keyboard layout. The reason is that '+' is Shift+1. Here a code snippet how I solved this in other applications

 

   tsmi.ShortcutKeys = OemCharacterToKeys(Keys.Control, '+');
   tsmi.ShortcutKeyDisplayString = OemCharacterToDisplayString(Keys.Control, '+');

 

[DllImport("user32.dll", CharSet = CharSet.Unicode)]
private static extern short VkKeyScanW(char ch);

private static Keys CharactertoKeys(char c)
{
    // Map character to scan code
    short scanCode = VkKeyScanW(c);

    // Translate scan code to key
    Keys key = (Keys)(scanCode & 0x00FF);
    if ((scanCode & 0x0100) != 0) key |= Keys.Shift;
    if ((scanCode & 0x0200) != 0) key |= Keys.Control;
    if ((scanCode & 0x0400) != 0) key |= Keys.Alt;

    return key;
}

public static Keys OemCharacterToKeys(Keys modifiers, char c)
{
    return modifiers | CharactertoKeys(c);
}

public static string OemCharacterToDisplayString(Keys modifiers, char c)
{
    // Get the text for the combination of the modifiers with the A key
    string text = new KeysConverter().ConvertToString(modifiers | Keys.A);

    // Replace the dummy A key with the character
    return text.Remove(text.Length - 1) + c;
}

 

And please do not translate the ShortcutKeyDisplayString. The result is that some few shortcuts are translated and the most other ones are not. I.e. Ctrl++ shows STRG++ while Ctrl+B shows Ctrl-B.

 

2) Zooming with the wheel does not look to be deterministic ;-)

 

Here is a proposal

 

  scaleFactor = ScaleByIncrement(scaleFactor, (int)Math.Round(wheelDeltaNormalized));

 

private float ScaleByIncrement(float scaleFactor, int increment)
{
    const double steps = 8;                     // number of steps between 2^n and 2^(n+1)
    double n = Math.Log(scaleFactor, 2);        // scaleFactor=2^n => determine n
    n = Math.Round(n * steps) / steps;          // round n depending on steps
    n += (double)increment / steps;             // add the increment
    scaleFactor = (float)Math.Pow(2, n);        // calculate the scale factor

    // This generates the following scaleFactor values (steps=8)
    // ..., 0.125, ..., 0.25, ..., 0.5, 0.545, 0.595, 0.648, 0.707, 0.771, 0.841, 0.917, 1
    // 1, 1.091, 1.189, 1.297, 1.414, 1.542, 1.682, 1.834, 2, ..., 4, ..., 8, ...

    return scaleFactor;
}

 

3) Ticks in ruler. OK this is a bit pedantic ;-)

 

If the main division is 50 then the next subdivision is 20 40 70 90 better would be 20 40 60 80.

This seems always be the case if the subdivision is 1/2.5 (and not 1/2).

It took a while figuring out why the rulers are looking strange to me.

But maybe this is a US thing...

 

4) Allow escape key to reset the pan function (this is what Windows allows while moving a window).

 

5) Show the drag image while dragging on top of Paint.NET and not just the drag cursor.

 

 

 

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