/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012-2017 gnosygnu@gmail.com

XOWA is licensed under the terms of the General Public License (GPL) Version 3,
or alternatively under the terms of the Apache License Version 2.0.

You may use XOWA according to either of these licenses as is most appropriate
for your project on a case-by-case basis.

The terms of each license can be found in the source code repository:

GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
*/
package gplx.gfui.ipts; import gplx.*; import gplx.gfui.*;
import gplx.gfui.envs.*; import gplx.gfui.controls.elems.*;
public class IptEventMgr implements Gfo_invk {
	public static void ExecKeyDown(GfuiElem sender, IptEvtDataKey keyState) {
		keyHandled = false; keyStateCur = keyState; // cache for simultaneous ipt events (ex: key.ctrl + mouse.left)
		IptEventData iptData = IptEventData.new_(sender, IptEventType_.KeyDown, keyState.Key(), keyState, mouseStateCur);
//			if (keyState.Key().Eq(IptKey_.add_(IptKey_.F1))) {
//				Tfds.Write(keyState.Key(), keyState.Key().Val());
//			}
		sender.IptBnds().Process(iptData); 
		SendData(iptData);
		keyHandled = keyState.Handled(); // WORKAROUND (WinForms): cache keyHandled b/c KeyDown.Handled=true does not make KeyPress.Handled=true;
	}
	public static void ExecKeyPress(GfuiElem sender, IptEvtDataKeyHeld keyPressState) {
//            Tfds.Write(keyPressState.KeyChar());
		if (keyHandled) {keyPressState.Handled_set(true); return;}
		IptEventData iptData = IptEventData.new_(sender, IptEventType_.KeyPress, IptKeyStrMgr.Instance.FetchByKeyPress((int)(byte)keyPressState.KeyChar()), keyStateCur, keyPressState, mouseStateCur);
		sender.IptBnds().Process(iptData);
		SendData(iptData);
	}
	public static void ExecKeyUp(GfuiElem sender, IptEvtDataKey keyState) {
		keyStateCur = IptEvtDataKey.Null;			// keyStateCur no longer needed; set to Null
		if (keyHandled) {keyState.Handled_set(true); return;}
		IptEventData iptData = IptEventData.new_(sender, IptEventType_.KeyUp, keyState.Key(), keyState, mouseStateCur);
		sender.IptBnds().Process(iptData);
		SendData(iptData);
	}
	public static void ExecMouseDown(GfuiElem sender, IptEvtDataMouse mouseState) {
		mouseStateCur = mouseState;				// cache for simultaneous ipt events (ex: key.ctrl + mouse.left)
		if (sender.IptBnds().Has(IptEventType_.MousePress)) {
			if (mousePressTimer == null) mousePressTimer = TimerAdp.new_(EventSink2, Tmr_cmd, 100, false);
			senderCur = sender; mousePressTimer.Enabled_on();
		}
		IptEventData iptData = IptEventData.new_(sender, IptEventType_.MouseDown, mouseState.Button(), keyStateCur, mouseState);
		sender.IptBnds().Process(iptData);
		SendData(iptData);
	}
	public static void ExecMouseMove(GfuiElem sender, IptEvtDataMouse mouseState) {
		IptEventData iptData = IptEventData.new_(sender, IptEventType_.MouseMove, IptMouseMove.AnyDirection, keyStateCur, mouseState);
		sender.IptBnds().Process(iptData);
		// SendData(iptData); // TOMBSTONE: do not send mouseMove events for PERF and DESIGN reasons
	}
	public static void ExecMouseUp(GfuiElem sender, IptEvtDataMouse mouseState) {
		mouseStateCur = IptEvtDataMouse.Null;		// mouseStateCur no longer needed; set to Null
		if (mousePressTimer != null)
		mousePressTimer.Enabled_off();
		IptEventData iptData = IptEventData.new_(sender, IptEventType_.MouseUp, mouseState.Button(), keyStateCur, mouseState);
		sender.IptBnds().Process(iptData);
		SendData(iptData);
	}
	public static void ExecMouseWheel(GfuiElem sender, IptEvtDataMouse mouseState) {
		IptEventData iptData = IptEventData.new_(sender, IptEventType_.MouseWheel, mouseState.Wheel(), keyStateCur, mouseState);
		sender.IptBnds().Process(iptData);
		SendData(iptData);
	}
	public static void ExecMousePress(GfuiElem sender, IptEvtDataMouse mouseState) {
		IptEventData iptData = IptEventData.new_(sender, IptEventType_.MousePress, mouseState.Button(), keyStateCur, mouseState);
		sender.IptBnds().Process(iptData);
		SendData(iptData);
	}
	static void MousePressTick() {
		IptEventMgr.ExecMousePress(senderCur, mouseStateCur);
	}
	static void SendData(IptEventData iptData) {
		if (StopFwd(iptData)) return;
		GfsCtx ctx = GfsCtx.new_();
		GfoMsg m = GfoMsg_.new_cast_(GfuiElemKeys.IptRcvd_evt).Add("iptData", iptData);
		Gfo_evt_mgr_.Pub_msg(iptData.Sender(), ctx, GfuiElemKeys.IptRcvd_evt, m);
	}
	public static boolean StopFwd(IptEventData iptData) {	// check if (a) control bubbles event; (b) iptData.Handled
		return !IptEventType_.Has(iptData.Sender().IptBnds().EventsToFwd(), iptData.EventType())
			|| iptData.Handled();
	}
	static boolean keyHandled = false; static IptEvtDataKey keyStateCur = IptEvtDataKey.Null; static IptEvtDataMouse mouseStateCur = IptEvtDataMouse.Null;
	static TimerAdp mousePressTimer; static GfuiElem senderCur;
	public static final    IptEventMgr EventSink2 = new IptEventMgr(); IptEventMgr() {}
	public Object Invk(GfsCtx ctx, int ikey, String k, GfoMsg m) {
		if		(ctx.Match(k, Tmr_cmd))		MousePressTick();
		else return Gfo_invk_.Rv_unhandled;
		return this;
	}	public static final    String Tmr_cmd = "Tmr";
}