Textarea event bug in Flash target

[turdparty]

Current Behavior

When you click on the scrollbar-thumb to scroll the text in a textarea the following error occurs for the flash target. (Not an issue for the android target.)

Error #1034: Type Coercion failed: cannot convert haxe.ui.events::FocusEvent@6e608d1 to haxe.ui.events.MouseEvent.

haxe.ui.util::EventMap/invoke at ...\haxe\lib\haxeui-core\git\haxe\ui\util\EventMap.hx:70
haxe.ui.core::ComponentEvents/dispatch at ...\haxe\lib\haxeui-core\git\haxe\ui\core\ComponentEvents.hx:92
haxe.ui.core::InteractiveComponent/set_focus at ...\haxe\lib\haxeui-core\git\haxe\ui\core\InteractiveComponent.hx:49
haxe.ui.components._TextArea::Events/onMouseDown at ...\haxe\lib\haxeui-core\git\haxe\ui\components\TextArea.hx:300
haxe.ui.util::EventMap/invoke at ...\haxe\lib\haxeui-core\git\haxe\ui\util\EventMap.hx:70
haxe.ui.core::ComponentEvents/dispatch at ...\haxe\lib\haxeui-core\git\haxe\ui\core\ComponentEvents.hx:92
haxe.ui.core::ComponentEvents/_onMappedEvent at ...\haxe\lib\haxeui-core\git\haxe\ui\core\ComponentEvents.hx:101
haxe.ui.backend::ComponentImpl/__onMouseEvent at ...\haxe\lib\haxeui-openfl\git\haxe\ui\backend\ComponentImpl.hx:273

Steps to Reproduce (for bugs)

1. Just take the most basic haxeui example and add a textarea.

<vbox> <label id="label1" text="Simple HaxeUI application" /> <button text="Click me!" onClick=" label1.text='Button clicked!' " /> <textarea text="1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n0\n"/> </vbox>

`import haxe.ui.Toolkit;
import haxe.ui.HaxeUIApp;
import haxe.ui.core.Screen;
import haxe.ui.core.Component;
import haxe.ui.macros.ComponentMacros;

class Main {
public static function main() {
Toolkit.init();
var app = new HaxeUIApp();
app.ready(function() {
var main:Component = ComponentMacros.buildComponent("Assets/UI.xml");
app.addComponent(main);
app.start();
});
}
}
`

[drondulet]

Same problem on HashLink backend, simple click on textarea leads to crash. Neko/CPP is fine.