Class TCastleCheckbox

This item has no description.

This item has no description.

This item has no description. Showing description inherited from TCastleUserInterface.PreferredSize.

Controls that have a preferred size should override this. By default this contains values derived from Width, WidthFraction, Height, HeightFraction, with Border subtracted.

Note that the arguments should be already scaled, i.e. multiplied by UIScale, i.e. expressed in final device pixels.

Note that the returned PreferredWidth and PreferredHeight must not include the space for Border. Border size will be added later.

This item has no description.

This item has no description.

This item has no description.

This item has no description. Showing description inherited from TCastleComponent.TranslateProperties.

Enumerate all properties that are possible to translate in this component. E.g. in TCastleLabel it will return TCastleLabel.Caption, in TCastleEdit it will return TCastleEdit.Text and TCastleEdit.Placeholder.

Returns only non-empty properties, thus assuming that if current (by convention, English) text is empty, then there is no point in translating it. Moreover descendants may define boolean properties to exclude particular text from translating, e.g. TCastleLabel.CaptionTranslate, TCastleEdit.TextTranslate, TCastleEdit.PlaceholderTranslate.

It is not recursive (it doesn't enumerate children properties). Use global TranslateProperties procedure to call this on a hierarchy of TComponent.

You usually don't want to call this method (it is called by other engine routines). But you may find it useful to override this, if you define new component.

This item has no description.

This item has no description.

This item has no description. Showing description inherited from TCastleUserInterface.Press.

Override this method to react to user pressing a key, mouse button or mouse wheel. Return True if the event was handled, which prevents from passing this event to other UI controls.

When implementing in descendants it is best to override it like this:

function TMyControl.Press(const Event: TInputPressRelease): boolean;
begin
  Result := inherited;
  if Result then Exit; // exit if ancestor already handled this event

  if Event.IsKey(keyEnter) then
  begin
    // do something in reaction to Enter key
    ...
    // let engine know that this input event was handled
    Exit(true);
  end;

  if Event.IsMouseButton(buttonLeft) then
  begin
    // do something in reaction to left mouse button press
    ...
    // let engine know that this input event was handled
    Exit(true);
  end;
end;

These events are generated for all UI controls, whether they are considered "interactive" or not. These events are generated for non-interactive controls like TCastleRectangleControl or TCastleLabel as well. For example, these events ignore the TCastleButton.Enabled state, they are generated always (see https://github.com/castle-engine/castle-engine/issues/413 ). Use instead TCastleButton.OnClick to detect clicks on a button in a way that honors the TCastleButton.Enabled state.

When a control returns True from Press, it means it starts to "capture" subsequent mouse events: subsequent mouse moves and release will be send to this control even if mouse will move outside of this control.

The events Press and Release are passed to the parent only after the children had a chance to process this event. Overriding them makes sense if you draw something that "looks clickable" in TCastleUserInterface.Render, which is the standard place you should draw stuff. For example our TCastleButton draws there.

In contrast, the events PreviewPress and PreviewRelease are passed first to the parent control, before children have a chance to process this event. In partcular, overriding them makes sense if you draw something that "looks clickable" in TCastleUserInterface.RenderOverChildren.

This item has no description. Showing description inherited from TCastleUserInterface.Release.

Override this method to react to user releasing a key, mouse button. Return True if the event was handled, which prevents from passing this event to other UI controls.

This is counterpart to Press method. See Press for more details.

Note: We'd like this method to also be called when user releases a mouse wheel. But currently releasing of the mouse wheel is not reported now by any backend. Only releasing of keys and mouse buttons is reported.

This item has no description. Showing description inherited from TCastleComponent.PropertySections.

Section where to show property in the editor.

This item has no description. Showing description inherited from TCastleUserInterface.EditorAllowResize.

Override this to prevent resizing some dimension in CGE editor.

Color of the label. By default opaque black.

Color of the checkbox square and checkmark. By default opaque black.

This item has no description.

This item has no description.

Should the Caption be localized (translated into other languages). Determines if the property is enumerated by TCastleComponent.TranslateProperties, which affects the rest of localization routines.

Margin between checkbox square and a text Caption.

Event sent when Checked value was changed by a user click. Note that this is not called when you change Checked property programmatically.

Should our size be determined by checkbox image size and caption.

Caption font size.

Size of the square checkbox.

Font used for the caption. When this is Nil then the TCastleContainer.DefaultFont is used, or (when TCastleContainer.DefaultFont is also Nil) the global UIFont.

TextColor that can be visually edited in Castle Game Engine Editor, Lazarus and Delphi. Normal user code does not need to deal with this, instead read or write TextColor directly.

See also

TextColor

Color of the label.

CheckboxColor that can be visually edited in Castle Game Engine Editor, Lazarus and Delphi. Normal user code does not need to deal with this, instead read or write CheckboxColor directly.

See also

CheckboxColor

Color of the checkbox square and checkmark.