/// <summary>
/// Generates the button's <see cref="GUIContent"/> object,
/// containing the provided label and [optionally] tooltip.
/// Tooltip could be modified to reflect the unusual state of the button.
/// </summary>
private static GUIContent ButtonContent(
ButtonAttribute attr, State state, string errorMessage, GUIContent srcLabel
)
{
Func <string, bool> isEmptyStr = string.IsNullOrEmpty;
string text = attr.Label.Trim();
if (isEmptyStr(text))
{
text = srcLabel.text;
}
if (isEmptyStr(text))
{
text = DefalutText;
}
var tooltip = attr.Tooltip;
if (isEmptyStr(tooltip))
{
tooltip = srcLabel.tooltip;
}
// modify text for non-regular modes:
if (state == State.Error)
{
string msg = string.Format("[ERROR: {0}]", errorMessage);
tooltip =
isEmptyStr(tooltip) ?
msg :
msg + "\n" + tooltip
;
text = "[ERROR] " + text;
}
else if (state == State.Multi)
{
tooltip =
isEmptyStr(tooltip) ?
MultiMsg :
string.Format("{0}\n{1}", tooltip, MultiMsg)
;
}
GUIContent buttonText = new GUIContent(text);
if (!isEmptyStr(tooltip))
{
buttonText.tooltip = tooltip;
}
return(buttonText);
}
/// <summary>
/// Calculates the button's <see cref="Rect"/> and <see cref="GUIStyle"/> matching to the provided attribute params.
/// </summary>
/// <param name="attr">The main <see cref="ButtonAttribute"/> object this drawer is applied to.</param>
/// <param name="position">The original <see cref="Rect"/> generated by Unity and passed to <see cref="OnGUI"/>.</param>
/// <param name="buttonText">The <see cref="GUIContent"/> object, containing text and an [optional] tooltip.</param>
/// <param name="style">
/// [out] Generated <see cref="GUIStyle"/> for the button.
/// It's based on the default stule for inspector button, but has it's <see cref="GUIStyle.wordWrap"/> set
/// acctordingly to the given button content.
/// </param>
private Rect ButtonRectAndStyle(
ButtonAttribute attr, Rect position, GUIContent buttonText,
out GUIStyle style
)
{
// first, init the style and assume the width from it:
style = new GUIStyle(
EditorGUIUtility.GetBuiltinSkin(EditorSkin.Inspector).button
)
{
wordWrap = false
};
if (attr.FontSize > 0)
{
style.fontSize = attr.FontSize;
}
var expectedWidth = style.CalcSize(buttonText).x;
// get the width in pixels, depending on the mode:
float srcWidth = position.width;
float width = Mathf.Max(
ButtonWidth(attr.Width, srcWidth, expectedWidth),
ButtonWidth(attr.MinWidth, srcWidth, expectedWidth)
);
width = Mathf.Min(width, srcWidth);
// calculate the height:
if (expectedWidth > width)
{
style.wordWrap = true;
}
_height = style.CalcHeight(buttonText, width);
// generate the actual rect:
return(new Rect(
position.x + Mathf.Max(srcWidth - width, 0.0f) * 0.5f,
position.y,
width,
_height
));
}
private Rect ButtonRect(ButtonAttribute attr, Rect position, GUIContent buttonText)
{
GUIStyle style;
return(ButtonRectAndStyle(attr, position, buttonText, out style));
}