--- /dev/null
+/*
+ * Jexer - Java Text User Interface
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2019 Kevin Lamonte
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * @author Kevin Lamonte [kevin.lamonte@gmail.com]
+ * @version 1
+ */
+package jexer;
+
+import jexer.bits.CellAttributes;
+import jexer.bits.Color;
+import jexer.bits.GraphicsChars;
+import jexer.bits.MnemonicString;
+import jexer.bits.StringUtils;
+import jexer.event.TKeypressEvent;
+import jexer.event.TMouseEvent;
+import static jexer.TKeypress.kbEnter;
+import static jexer.TKeypress.kbSpace;
+
+/**
+ * TButton implements a simple button. To make the button do something, pass
+ * a TAction class to its constructor.
+ *
+ * @see TAction#DO()
+ */
+public class TButton extends TWidget {
+
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * The shortcut and button text.
+ */
+ private MnemonicString mnemonic;
+
+ /**
+ * Remember mouse state.
+ */
+ private TMouseEvent mouse;
+
+ /**
+ * True when the button is being pressed and held down.
+ */
+ private boolean inButtonPress = false;
+
+ /**
+ * The action to perform when the button is clicked.
+ */
+ private TAction action;
+
+ /**
+ * The background color used for the button "shadow", or null for "no
+ * shadow".
+ */
+ private CellAttributes shadowColor;
+
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Private constructor.
+ *
+ * @param parent parent widget
+ * @param text label on the button
+ * @param x column relative to parent
+ * @param y row relative to parent
+ */
+ private TButton(final TWidget parent, final String text,
+ final int x, final int y) {
+
+ // Set parent and window
+ super(parent);
+
+ mnemonic = new MnemonicString(text);
+
+ setX(x);
+ setY(y);
+ super.setHeight(2);
+ super.setWidth(StringUtils.width(mnemonic.getRawLabel()) + 3);
+
+ shadowColor = new CellAttributes();
+ shadowColor.setTo(getWindow().getBackground());
+ shadowColor.setForeColor(Color.BLACK);
+ shadowColor.setBold(false);
+
+ // Since we set dimensions after TWidget's constructor, we need to
+ // update the layout manager.
+ if (getParent().getLayoutManager() != null) {
+ getParent().getLayoutManager().remove(this);
+ getParent().getLayoutManager().add(this);
+ }
+ }
+
+ /**
+ * Public constructor.
+ *
+ * @param parent parent widget
+ * @param text label on the button
+ * @param x column relative to parent
+ * @param y row relative to parent
+ * @param action to call when button is pressed
+ */
+ public TButton(final TWidget parent, final String text,
+ final int x, final int y, final TAction action) {
+
+ this(parent, text, x, y);
+ this.action = action;
+ }
+
+ // ------------------------------------------------------------------------
+ // Event handlers ---------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Returns true if the mouse is currently on the button.
+ *
+ * @return if true the mouse is currently on the button
+ */
+ private boolean mouseOnButton() {
+ int rightEdge = getWidth() - 1;
+ if (inButtonPress) {
+ rightEdge++;
+ }
+ if ((mouse != null)
+ && (mouse.getY() == 0)
+ && (mouse.getX() >= 0)
+ && (mouse.getX() < rightEdge)
+ ) {
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Handle mouse button presses.
+ *
+ * @param mouse mouse button event
+ */
+ @Override
+ public void onMouseDown(final TMouseEvent mouse) {
+ this.mouse = mouse;
+
+ if ((mouseOnButton()) && (mouse.isMouse1())) {
+ // Begin button press
+ inButtonPress = true;
+ }
+ }
+
+ /**
+ * Handle mouse button releases.
+ *
+ * @param mouse mouse button release event
+ */
+ @Override
+ public void onMouseUp(final TMouseEvent mouse) {
+ this.mouse = mouse;
+
+ if (inButtonPress && mouse.isMouse1()) {
+ // Dispatch the event
+ dispatch();
+ }
+
+ }
+
+ /**
+ * Handle mouse movements.
+ *
+ * @param mouse mouse motion event
+ */
+ @Override
+ public void onMouseMotion(final TMouseEvent mouse) {
+ this.mouse = mouse;
+
+ if (!mouseOnButton()) {
+ inButtonPress = false;
+ }
+ }
+
+ /**
+ * Handle keystrokes.
+ *
+ * @param keypress keystroke event
+ */
+ @Override
+ public void onKeypress(final TKeypressEvent keypress) {
+ if (keypress.equals(kbEnter)
+ || keypress.equals(kbSpace)
+ ) {
+ // Dispatch
+ dispatch();
+ return;
+ }
+
+ // Pass to parent for the things we don't care about.
+ super.onKeypress(keypress);
+ }
+
+ // ------------------------------------------------------------------------
+ // TWidget ----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Override TWidget's width: we can only set width at construction time.
+ *
+ * @param width new widget width (ignored)
+ */
+ @Override
+ public void setWidth(final int width) {
+ // Do nothing
+ }
+
+ /**
+ * Override TWidget's height: we can only set height at construction
+ * time.
+ *
+ * @param height new widget height (ignored)
+ */
+ @Override
+ public void setHeight(final int height) {
+ // Do nothing
+ }
+
+ /**
+ * Draw a button with a shadow.
+ */
+ @Override
+ public void draw() {
+ CellAttributes buttonColor;
+ CellAttributes menuMnemonicColor;
+
+ if (!isEnabled()) {
+ buttonColor = getTheme().getColor("tbutton.disabled");
+ menuMnemonicColor = getTheme().getColor("tbutton.disabled");
+ } else if (isAbsoluteActive()) {
+ buttonColor = getTheme().getColor("tbutton.active");
+ menuMnemonicColor = getTheme().getColor("tbutton.mnemonic.highlighted");
+ } else {
+ buttonColor = getTheme().getColor("tbutton.inactive");
+ menuMnemonicColor = getTheme().getColor("tbutton.mnemonic");
+ }
+
+ if (inButtonPress) {
+ putCharXY(1, 0, ' ', buttonColor);
+ putStringXY(2, 0, mnemonic.getRawLabel(), buttonColor);
+ putCharXY(getWidth() - 1, 0, ' ', buttonColor);
+ } else {
+ putCharXY(0, 0, ' ', buttonColor);
+ putStringXY(1, 0, mnemonic.getRawLabel(), buttonColor);
+ putCharXY(getWidth() - 2, 0, ' ', buttonColor);
+
+ if (shadowColor != null) {
+ putCharXY(getWidth() - 1, 0,
+ GraphicsChars.CP437[0xDC], shadowColor);
+ hLineXY(1, 1, getWidth() - 1,
+ GraphicsChars.CP437[0xDF], shadowColor);
+ }
+ }
+ if (mnemonic.getScreenShortcutIdx() >= 0) {
+ if (inButtonPress) {
+ putCharXY(2 + mnemonic.getScreenShortcutIdx(), 0,
+ mnemonic.getShortcut(), menuMnemonicColor);
+ } else {
+ putCharXY(1 + mnemonic.getScreenShortcutIdx(), 0,
+ mnemonic.getShortcut(), menuMnemonicColor);
+ }
+ }
+ }
+
+ // ------------------------------------------------------------------------
+ // TButton ----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Get the mnemonic string for this button.
+ *
+ * @return mnemonic string
+ */
+ public MnemonicString getMnemonic() {
+ return mnemonic;
+ }
+
+ /**
+ * Act as though the button was pressed. This is useful for other UI
+ * elements to get the same action as if the user clicked the button.
+ */
+ public void dispatch() {
+ if (action != null) {
+ action.DO(this);
+ inButtonPress = false;
+ }
+ }
+
+ /**
+ * Set the background color used for the button "shadow". If null, no
+ * shadow will be drawn.
+ *
+ * @param color the new background color, or null for no shadow
+ */
+ public void setShadowColor(final CellAttributes color) {
+ if (color != null) {
+ shadowColor = new CellAttributes();
+ shadowColor.setTo(color);
+ shadowColor.setForeColor(Color.BLACK);
+ shadowColor.setBold(false);
+ } else {
+ shadowColor = null;
+ }
+ }
+
+}
git://git.nikiroo.be / fanfix.git / blobdiff