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PicoGK_ViewerKeyboard.cs
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/
PicoGK_ViewerKeyboard.cs
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//
// SPDX-License-Identifier: Apache-2.0
//
// PicoGK ("peacock") is a compact software kernel for computational geometry,
// specifically for use in Computational Engineering Models (CEM).
//
// For more information, please visit https://picogk.org
//
// PicoGK is developed and maintained by LEAP 71 - © 2023-2024 by LEAP 71
// https://leap71.com
//
// Computational Engineering will profoundly change our physical world in the
// years ahead. Thank you for being part of the journey.
//
// We have developed this library to be used widely, for both commercial and
// non-commercial projects alike. Therefore, we have released it under a
// permissive open-source license.
//
// The foundation of PicoGK is a thin layer on top of the powerful open-source
// OpenVDB project, which in turn uses many other Free and Open Source Software
// libraries. We are grateful to be able to stand on the shoulders of giants.
//
// LEAP 71 licenses this file to you under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with the
// License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, THE SOFTWARE IS
// PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED.
//
// See the License for the specific language governing permissions and
// limitations under the License.
//
namespace PicoGK
{
public partial class Viewer
{
LinkedList<IKeyHandler> m_oKeyHandlers = new();
KeyHandler m_oHandler = new();
public void AddKeyHandler(IKeyHandler xKeyHandler)
{
// Add to the beginning, so the last added is processed first
m_oKeyHandlers.AddFirst(xKeyHandler);
}
public interface IKeyHandler
{
bool bHandleEvent( Viewer oViewer,
EKeys eKey,
bool bPressed,
bool bShift,
bool bCtrl,
bool bAlt,
bool bCmd);
}
public enum EKeys
{
Key_Space = 32,
Key_0 = 48,
Key_1,
Key_2,
Key_3,
Key_4,
Key_5,
Key_6,
Key_7,
Key_8,
Key_9,
Key_A = 65,
Key_B,
Key_C,
Key_D,
Key_E,
Key_F,
Key_G,
Key_H,
Key_I,
Key_J,
Key_K,
Key_L,
Key_M,
Key_N,
Key_O,
Key_P,
Key_Q,
Key_R,
Key_S,
Key_T,
Key_U,
Key_V,
Key_W,
Key_X,
Key_Y,
Key_Z = 90,
Key_ESC = 256,
Key_Enter,
Key_Tab,
Key_Backspace,
Key_Insert,
Key_Delete,
Key_Right,
Key_Left,
Key_Down,
Key_Up,
Key_PgUp,
Key_PgDn,
Key_Home,
Key_End = 269,
Key_F1 = 290,
Key_F2,
Key_F3,
Key_F4,
Key_F5,
Key_F6,
Key_F7,
Key_F8,
Key_F9,
Key_F10,
Key_F11,
Key_F12
};
public class KeyAction
{
public KeyAction( IViewerAction xAction,
EKeys eKey,
bool bPressed = false, // Handle on release by default
bool bShift = false,
bool bCtrl = false,
bool bAlt = false,
bool bCmd = false)
{
m_xAction = xAction;
m_eKey = eKey;
m_bPressed = bPressed;
m_bShift = bShift;
m_bCtrl = bCtrl;
m_bAlt = bAlt;
m_bCmd = bCmd;
}
public bool bKeyEquals( EKeys eKey,
bool bPressed,
bool bShift,
bool bCtrl,
bool bAlt,
bool bCmd)
{
return ( (m_eKey == eKey) &&
(m_bPressed == bPressed) &&
(m_bShift == bShift) &&
(m_bCtrl == bCtrl) &&
(m_bAlt == bAlt) &&
(m_bCmd == bCmd));
}
public void Do(Viewer oViewer)
{
m_xAction.Do(oViewer);
}
IViewerAction m_xAction;
EKeys m_eKey;
bool m_bPressed;
bool m_bShift;
bool m_bCtrl;
bool m_bAlt;
bool m_bCmd;
}
public class KeyHandler : IKeyHandler
{
public void AddAction(KeyAction oAction)
{
m_oKeyActions.AddFirst(oAction);
}
LinkedList<KeyAction> m_oKeyActions = new();
public bool bHandleEvent( Viewer oViewer,
EKeys eKey,
bool bPressed,
bool bShift,
bool bCtrl,
bool bAlt,
bool bCmd)
{
foreach (KeyAction oAction in m_oKeyActions)
{
if (oAction.bKeyEquals( eKey,
bPressed,
bShift,
bCtrl,
bAlt,
bCmd))
{
oAction.Do(oViewer);
return true;
}
}
return false;
}
}
}
}