/// <summary>
/// Displays a single-option popup where the option list is only built when the dropdown is shown.
/// Useful when building the options list is very demanding (e.g. reflection).
/// </summary>
public static T PopupSingle
(
Rect position,
GetOptionsCallback getOptions,
T selectedValue,
DropdownOption <T> noneOption,
GUIContent label = null,
GUIStyle style = null
)
{
var selectedOption = new DropdownOption <T>(selectedValue);
return(PopupSingle
(
position,
getOptions,
selectedOption,
noneOption,
label,
style
));
}
/// <summary>
/// Displays a multiple-options popup where the option list is only built when the dropdown is shown.
/// Useful when building the options list is very demanding (e.g. reflection).
/// Note that not specifying a label will force the options list to be built at every repaint.
/// </summary>
public static HashSet <T> PopupMultiple
(
Rect position,
GetOptionsCallback getOptions,
HashSet <T> selectedOptions,
bool showNothingEverything = true,
GUIContent label = null,
GUIStyle style = null
)
{
var hasMultipleDifferentValues = EditorGUI.showMixedValue;
IEnumerable <DropdownOption <T> > options = null;
// Determine the label text if no override is specified
if (label == null)
{
options = getOptions();
string text;
if (hasMultipleDifferentValues)
{
text = "\u2014"; // Em Dash
}
else
{
var selectedOptionsCount = selectedOptions.Count();
var optionsCount = options.Count();
if (selectedOptionsCount == 0)
{
text = "Nothing";
}
else if (selectedOptionsCount == 1)
{
text = options.First(o => Equal(o.value, selectedOptions.First())).label;
}
else if (selectedOptionsCount == optionsCount)
{
text = "Everything";
}
else
{
text = "(Mixed)";
}
}
label = new GUIContent(text);
}
// Apply the popup style if no override is specified
if (style == null)
{
style = EditorStyles.popup;
}
// Render a button and get its control ID
var popupClicked = GUI.Button(position, label, style);
var popupControlID = GetLastControlID();
if (popupClicked)
{
// Cancel button click
GUI.changed = false;
// Assign the currently active control ID
activePopupControlID = popupControlID;
// Display the dropdown
DropdownMultiple
(
new Vector2(position.xMin, position.yMax),
(values) =>
{
activeMultipleDropdownValues = values;
activeDropdownChanged = true;
},
options != null ? options : getOptions(),
selectedOptions,
showNothingEverything
);
}
if (popupControlID == activePopupControlID && activeDropdownChanged)
{
GUI.changed = true;
activePopupControlID = -1;
activeDropdownChanged = false;
return(activeMultipleDropdownValues);
}
else
{
return(selectedOptions.ToHashSet());
}
}
/// <summary>
/// Displays a single-option popup where the option list is only built when the dropdown is shown.
/// Useful when building the options list is very demanding (e.g. reflection).
/// </summary>
public static T PopupSingle
(
Rect position,
GetOptionsCallback getOptions,
DropdownOption <T> selectedOption,
DropdownOption <T> noneOption,
GUIContent label = null,
GUIStyle style = null
)
{
var hasMultipleDifferentValues = EditorGUI.showMixedValue;
// Determine the label text if no override is specified
if (label == null)
{
string text;
if (hasMultipleDifferentValues)
{
text = "\u2014"; // Em Dash
}
else if (selectedOption == null)
{
if (noneOption != null)
{
text = noneOption.label;
}
else
{
text = string.Empty;
}
}
else
{
text = selectedOption.label;
}
label = new GUIContent(text);
}
// Apply the popup style is no override is specified
if (style == null)
{
style = EditorStyles.popup;
}
// Render a button and get its control ID
var popupClicked = GUI.Button(position, label, style);
var popupControlID = GetLastControlID();
if (popupClicked)
{
// Cancel button click
GUI.changed = false;
// Assign the active control ID
activePopupControlID = popupControlID;
// Display the dropdown
DropdownSingle
(
new Vector2(position.xMin, position.yMax),
(value) =>
{
activeSingleDropdownValue = value;
activeDropdownChanged = true;
},
getOptions(),
selectedOption,
noneOption
);
}
if (popupControlID == activePopupControlID && activeDropdownChanged)
{ // Selected option changed
// TODO: Use EditorWindow.SendEvent like EditorGUI.PopupCallbackInfo does.
// Otherwise, there seems to be a 1-frame delay in update.
GUI.changed = true;
activePopupControlID = -1;
activeDropdownChanged = false;
return(activeSingleDropdownValue);
}
else if (selectedOption == null)
{ // Selected option is null
if (noneOption != null)
{
return(noneOption.value);
}
else
{
return(default(T));
}
}
else
{
return(selectedOption.value);
}
}
