menu system compiles

[fanfix.git] / src / jexer / menu / TSubMenu.java

diff --git a/src/jexer/menu/TSubMenu.java b/src/jexer/menu/TSubMenu.java
new file mode 100644 (file)
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--- /dev/null
+++ b/src/jexer/menu/TSubMenu.java
@@ -0,0 +1,176 @@
+/**
+ * Jexer - Java Text User Interface
+ *
+ * License: LGPLv3 or later
+ *
+ * This module is licensed under the GNU Lesser General Public License
+ * Version 3.  Please see the file "COPYING" in this directory for more
+ * information about the GNU Lesser General Public License Version 3.
+ *
+ *     Copyright (C) 2015  Kevin Lamonte
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see
+ * http://www.gnu.org/licenses/, or write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ * @author Kevin Lamonte [kevin.lamonte@gmail.com]
+ * @version 1
+ */
+package jexer.menu;
+
+import jexer.TWidget;
+import jexer.bits.CellAttributes;
+import jexer.bits.GraphicsChars;
+import jexer.event.TKeypressEvent;
+import static jexer.TKeypress.*;
+
+/**
+ * TSubMenu is a special case menu item that wraps another TMenu.
+ */
+public class TSubMenu extends TMenuItem {
+
+    /**
+     * The menu window.  Note package private access.
+     */
+    TMenu menu;
+
+    /**
+     * Package private constructor.
+     *
+     * @param parent parent widget
+     * @param title menu title.  Title must contain a keyboard shortcut,
+     * denoted by prefixing a letter with "&", e.g. "&File"
+     * @param x column relative to parent
+     * @param y row relative to parent
+     */
+    TSubMenu(final TMenu parent, final String title, final int x, final int y) {
+        super(parent, TMenu.MID_UNUSED, x, y, title);
+
+        setActive(false);
+        setEnabled(true);
+
+        this.menu = new TMenu(parent.getApplication(), x, getAbsoluteY() - 1,
+            title);
+        setWidth(menu.getWidth() + 2);
+
+        this.menu.isSubMenu = true;
+    }
+
+    /**
+     * Draw the menu title.
+     */
+    @Override
+    public void draw() {
+        super.draw();
+
+        CellAttributes background = getTheme().getColor("tmenu");
+        CellAttributes menuColor;
+        CellAttributes menuMnemonicColor;
+        if (getAbsoluteActive()) {
+            menuColor = getTheme().getColor("tmenu.highlighted");
+            menuMnemonicColor = getTheme().getColor("tmenu.mnemonic.highlighted");
+        } else {
+            if (getEnabled()) {
+                menuColor = getTheme().getColor("tmenu");
+                menuMnemonicColor = getTheme().getColor("tmenu.mnemonic");
+            } else {
+                menuColor = getTheme().getColor("tmenu.disabled");
+                menuMnemonicColor = getTheme().getColor("tmenu.disabled");
+            }
+        }
+
+        // Add the arrow
+        getScreen().putCharXY(getWidth() - 2, 0, GraphicsChars.CP437[0x10],
+            menuColor);
+    }
+
+    /**
+     * Handle keystrokes.
+     *
+     * @param keypress keystroke event
+     */
+    @Override
+    public void onKeypress(final TKeypressEvent keypress) {
+
+        if (menu.getActive()) {
+            menu.onKeypress(keypress);
+            return;
+        }
+
+        if (keypress.equals(kbEnter)) {
+            dispatch();
+            return;
+        }
+
+        if (keypress.equals(kbRight)) {
+            dispatch();
+            return;
+        }
+
+        if (keypress.equals(kbDown)) {
+            getParent().switchWidget(true);
+            return;
+        }
+
+        if (keypress.equals(kbUp)) {
+            getParent().switchWidget(false);
+            return;
+        }
+
+        if (keypress.equals(kbLeft)) {
+            TMenu parentMenu = (TMenu) getParent();
+            if (parentMenu.isSubMenu) {
+                getApplication().closeSubMenu();
+            } else {
+                getApplication().switchMenu(false);
+            }
+            return;
+        }
+
+        if (keypress.equals(kbEsc)) {
+            getApplication().closeMenu();
+            return;
+        }
+    }
+
+    /**
+     * Override dispatch() to do nothing.
+     */
+    @Override
+    public void dispatch() {
+        assert (getEnabled());
+        if (getAbsoluteActive()) {
+            if (!menu.getActive()) {
+                getApplication().addSubMenu(menu);
+                menu.setActive(true);
+            }
+        }
+    }
+
+    /**
+     * Returns my active widget.
+     *
+     * @return widget that is active, or this if no children
+     */
+    @Override
+    public TWidget getActiveChild() {
+        if (menu.getActive()) {
+            return menu;
+        }
+        // Menu not active, return me
+        return this;
+    }
+
+}