--- /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 java.awt.image.BufferedImage;
+
+import jexer.backend.ECMA48Terminal;
+import jexer.backend.MultiScreen;
+import jexer.backend.SwingTerminal;
+import jexer.bits.Cell;
+import jexer.event.TKeypressEvent;
+import jexer.event.TMouseEvent;
+import jexer.event.TResizeEvent;
+import static jexer.TKeypress.*;
+
+/**
+ * TImage renders a piece of a bitmap image on screen.
+ */
+public class TImage extends TWidget {
+
+ // ------------------------------------------------------------------------
+ // Constants --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Selections for fitting the image to the text cells.
+ */
+ public enum Scale {
+ /**
+ * No scaling.
+ */
+ NONE,
+
+ /**
+ * Stretch/shrink the image in both directions to fully fill the text
+ * area width/height.
+ */
+ STRETCH,
+
+ /**
+ * Scale the image, preserving aspect ratio, to fill the text area
+ * width/height (like letterbox). The background color for the
+ * letterboxed area is specified in scaleBackColor.
+ */
+ SCALE,
+ }
+
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Scaling strategy to use.
+ */
+ private Scale scale = Scale.NONE;
+
+ /**
+ * Scaling strategy to use.
+ */
+ private java.awt.Color scaleBackColor = java.awt.Color.BLACK;
+
+ /**
+ * The action to perform when the user clicks on the image.
+ */
+ private TAction clickAction;
+
+ /**
+ * The image to display.
+ */
+ private BufferedImage image;
+
+ /**
+ * The original image from construction time.
+ */
+ private BufferedImage originalImage;
+
+ /**
+ * The current scaling factor for the image.
+ */
+ private double scaleFactor = 1.0;
+
+ /**
+ * The current clockwise rotation for the image.
+ */
+ private int clockwise = 0;
+
+ /**
+ * If true, this widget was resized and a new scaled image must be
+ * produced.
+ */
+ private boolean resized = false;
+
+ /**
+ * Left column of the image. 0 is the left-most column.
+ */
+ private int left;
+
+ /**
+ * Top row of the image. 0 is the top-most row.
+ */
+ private int top;
+
+ /**
+ * The cells containing the broken up image pieces.
+ */
+ private Cell cells[][];
+
+ /**
+ * The number of rows in cells[].
+ */
+ private int cellRows;
+
+ /**
+ * The number of columns in cells[].
+ */
+ private int cellColumns;
+
+ /**
+ * Last text width value.
+ */
+ private int lastTextWidth = -1;
+
+ /**
+ * Last text height value.
+ */
+ private int lastTextHeight = -1;
+
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Public constructor.
+ *
+ * @param parent parent widget
+ * @param x column relative to parent
+ * @param y row relative to parent
+ * @param width number of text cells for width of the image
+ * @param height number of text cells for height of the image
+ * @param image the image to display
+ * @param left left column of the image. 0 is the left-most column.
+ * @param top top row of the image. 0 is the top-most row.
+ */
+ public TImage(final TWidget parent, final int x, final int y,
+ final int width, final int height,
+ final BufferedImage image, final int left, final int top) {
+
+ this(parent, x, y, width, height, image, left, top, null);
+ }
+
+ /**
+ * Public constructor.
+ *
+ * @param parent parent widget
+ * @param x column relative to parent
+ * @param y row relative to parent
+ * @param width number of text cells for width of the image
+ * @param height number of text cells for height of the image
+ * @param image the image to display
+ * @param left left column of the image. 0 is the left-most column.
+ * @param top top row of the image. 0 is the top-most row.
+ * @param clickAction function to call when mouse is pressed
+ */
+ public TImage(final TWidget parent, final int x, final int y,
+ final int width, final int height,
+ final BufferedImage image, final int left, final int top,
+ final TAction clickAction) {
+
+ // Set parent and window
+ super(parent, x, y, width, height);
+
+ setCursorVisible(false);
+ this.originalImage = image;
+ this.left = left;
+ this.top = top;
+ this.clickAction = clickAction;
+
+ sizeToImage(true);
+ }
+
+ // ------------------------------------------------------------------------
+ // Event handlers ---------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Handle mouse press events.
+ *
+ * @param mouse mouse button press event
+ */
+ @Override
+ public void onMouseDown(final TMouseEvent mouse) {
+ if (clickAction != null) {
+ clickAction.DO(this);
+ return;
+ }
+ }
+
+ /**
+ * Handle keystrokes.
+ *
+ * @param keypress keystroke event
+ */
+ @Override
+ public void onKeypress(final TKeypressEvent keypress) {
+ if (!keypress.getKey().isFnKey()) {
+ if (keypress.getKey().getChar() == '+') {
+ // Make the image bigger.
+ scaleFactor *= 1.25;
+ image = null;
+ sizeToImage(true);
+ return;
+ }
+ if (keypress.getKey().getChar() == '-') {
+ // Make the image smaller.
+ scaleFactor *= 0.80;
+ image = null;
+ sizeToImage(true);
+ return;
+ }
+ }
+ if (keypress.equals(kbAltUp)) {
+ // Make the image bigger.
+ scaleFactor *= 1.25;
+ image = null;
+ sizeToImage(true);
+ return;
+ }
+ if (keypress.equals(kbAltDown)) {
+ // Make the image smaller.
+ scaleFactor *= 0.80;
+ image = null;
+ sizeToImage(true);
+ return;
+ }
+ if (keypress.equals(kbAltRight)) {
+ // Rotate clockwise.
+ clockwise++;
+ clockwise %= 4;
+ image = null;
+ sizeToImage(true);
+ return;
+ }
+ if (keypress.equals(kbAltLeft)) {
+ // Rotate counter-clockwise.
+ clockwise--;
+ if (clockwise < 0) {
+ clockwise = 3;
+ }
+ image = null;
+ sizeToImage(true);
+ return;
+ }
+
+ if (keypress.equals(kbShiftLeft)) {
+ switch (scale) {
+ case NONE:
+ setScaleType(Scale.SCALE);
+ return;
+ case STRETCH:
+ setScaleType(Scale.NONE);
+ return;
+ case SCALE:
+ setScaleType(Scale.STRETCH);
+ return;
+ }
+ }
+ if (keypress.equals(kbShiftRight)) {
+ switch (scale) {
+ case NONE:
+ setScaleType(Scale.STRETCH);
+ return;
+ case STRETCH:
+ setScaleType(Scale.SCALE);
+ return;
+ case SCALE:
+ setScaleType(Scale.NONE);
+ return;
+ }
+ }
+
+ // Pass to parent for the things we don't care about.
+ super.onKeypress(keypress);
+ }
+
+ /**
+ * Handle resize events.
+ *
+ * @param event resize event
+ */
+ @Override
+ public void onResize(final TResizeEvent event) {
+ // Get my width/height set correctly.
+ super.onResize(event);
+
+ if (scale == Scale.NONE) {
+ return;
+ }
+ image = null;
+ resized = true;
+ }
+
+ // ------------------------------------------------------------------------
+ // TWidget ----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Draw the image.
+ */
+ @Override
+ public void draw() {
+ sizeToImage(false);
+
+ // We have already broken the image up, just draw the last set of
+ // cells.
+ for (int x = 0; (x < getWidth()) && (x + left < cellColumns); x++) {
+ if ((left + x) * lastTextWidth > image.getWidth()) {
+ continue;
+ }
+
+ for (int y = 0; (y < getHeight()) && (y + top < cellRows); y++) {
+ if ((top + y) * lastTextHeight > image.getHeight()) {
+ continue;
+ }
+ assert (x + left < cellColumns);
+ assert (y + top < cellRows);
+
+ getWindow().putCharXY(x, y, cells[x + left][y + top]);
+ }
+ }
+
+ }
+
+ // ------------------------------------------------------------------------
+ // TImage -----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Size cells[][] according to the screen font size.
+ *
+ * @param always if true, always resize the cells
+ */
+ private void sizeToImage(final boolean always) {
+ int textWidth = getScreen().getTextWidth();
+ int textHeight = getScreen().getTextHeight();
+
+ if (image == null) {
+ image = rotateImage(originalImage, clockwise);
+ image = scaleImage(image, scaleFactor, getWidth(), getHeight(),
+ textWidth, textHeight);
+ }
+
+ if ((always == true) ||
+ (resized == true) ||
+ ((textWidth > 0)
+ && (textWidth != lastTextWidth)
+ && (textHeight > 0)
+ && (textHeight != lastTextHeight))
+ ) {
+ resized = false;
+
+ cellColumns = image.getWidth() / textWidth;
+ if (cellColumns * textWidth < image.getWidth()) {
+ cellColumns++;
+ }
+ cellRows = image.getHeight() / textHeight;
+ if (cellRows * textHeight < image.getHeight()) {
+ cellRows++;
+ }
+
+ // Break the image up into an array of cells.
+ cells = new Cell[cellColumns][cellRows];
+
+ for (int x = 0; x < cellColumns; x++) {
+ for (int y = 0; y < cellRows; y++) {
+
+ int width = textWidth;
+ if ((x + 1) * textWidth > image.getWidth()) {
+ width = image.getWidth() - (x * textWidth);
+ }
+ int height = textHeight;
+ if ((y + 1) * textHeight > image.getHeight()) {
+ height = image.getHeight() - (y * textHeight);
+ }
+
+ Cell cell = new Cell();
+ cell.setImage(image.getSubimage(x * textWidth,
+ y * textHeight, width, height));
+
+ cells[x][y] = cell;
+ }
+ }
+
+ lastTextWidth = textWidth;
+ lastTextHeight = textHeight;
+ }
+
+ if ((left + getWidth()) > cellColumns) {
+ left = cellColumns - getWidth();
+ }
+ if (left < 0) {
+ left = 0;
+ }
+ if ((top + getHeight()) > cellRows) {
+ top = cellRows - getHeight();
+ }
+ if (top < 0) {
+ top = 0;
+ }
+ }
+
+ /**
+ * Get the top corner to render.
+ *
+ * @return the top row
+ */
+ public int getTop() {
+ return top;
+ }
+
+ /**
+ * Set the top corner to render.
+ *
+ * @param top the new top row
+ */
+ public void setTop(final int top) {
+ this.top = top;
+ if (this.top > cellRows - getHeight()) {
+ this.top = cellRows - getHeight();
+ }
+ if (this.top < 0) {
+ this.top = 0;
+ }
+ }
+
+ /**
+ * Get the left corner to render.
+ *
+ * @return the left column
+ */
+ public int getLeft() {
+ return left;
+ }
+
+ /**
+ * Set the left corner to render.
+ *
+ * @param left the new left column
+ */
+ public void setLeft(final int left) {
+ this.left = left;
+ if (this.left > cellColumns - getWidth()) {
+ this.left = cellColumns - getWidth();
+ }
+ if (this.left < 0) {
+ this.left = 0;
+ }
+ }
+
+ /**
+ * Get the number of text cell rows for this image.
+ *
+ * @return the number of rows
+ */
+ public int getRows() {
+ return cellRows;
+ }
+
+ /**
+ * Get the number of text cell columns for this image.
+ *
+ * @return the number of columns
+ */
+ public int getColumns() {
+ return cellColumns;
+ }
+
+ /**
+ * Get the raw (unprocessed) image.
+ *
+ * @return the image
+ */
+ public BufferedImage getImage() {
+ return originalImage;
+ }
+
+ /**
+ * Set the raw image, and reprocess to make the visible image.
+ *
+ * @param image the new image
+ */
+ public void setImage(final BufferedImage image) {
+ this.originalImage = image;
+ this.image = null;
+ sizeToImage(true);
+ }
+
+ /**
+ * Get the visible (processed) image.
+ *
+ * @return the image that is currently on screen
+ */
+ public BufferedImage getVisibleImage() {
+ return image;
+ }
+
+ /**
+ * Get the scaling strategy.
+ *
+ * @return Scale.NONE, Scale.STRETCH, etc.
+ */
+ public Scale getScaleType() {
+ return scale;
+ }
+
+ /**
+ * Set the scaling strategy.
+ *
+ * @param scale Scale.NONE, Scale.STRETCH, etc.
+ */
+ public void setScaleType(final Scale scale) {
+ this.scale = scale;
+ this.image = null;
+ sizeToImage(true);
+ }
+
+ /**
+ * Get the scale factor.
+ *
+ * @return the scale factor
+ */
+ public double getScaleFactor() {
+ return scaleFactor;
+ }
+
+ /**
+ * Set the scale factor. 1.0 means no scaling.
+ *
+ * @param scaleFactor the new scale factor
+ */
+ public void setScaleFactor(final double scaleFactor) {
+ this.scaleFactor = scaleFactor;
+ image = null;
+ sizeToImage(true);
+ }
+
+ /**
+ * Get the rotation, as degrees.
+ *
+ * @return the rotation in degrees
+ */
+ public int getRotation() {
+ switch (clockwise) {
+ case 0:
+ return 0;
+ case 1:
+ return 90;
+ case 2:
+ return 180;
+ case 3:
+ return 270;
+ default:
+ // Don't know how this happened, but fix it.
+ clockwise = 0;
+ image = null;
+ sizeToImage(true);
+ return 0;
+ }
+ }
+
+ /**
+ * Set the rotation, as degrees clockwise.
+ *
+ * @param rotation 0, 90, 180, or 270
+ */
+ public void setRotation(final int rotation) {
+ switch (rotation) {
+ case 0:
+ clockwise = 0;
+ break;
+ case 90:
+ clockwise = 1;
+ break;
+ case 180:
+ clockwise = 2;
+ break;
+ case 270:
+ clockwise = 3;
+ break;
+ default:
+ // Don't know how this happened, but fix it.
+ clockwise = 0;
+ break;
+ }
+
+ image = null;
+ sizeToImage(true);
+ }
+
+ /**
+ * Scale an image by to be scaleFactor size.
+ *
+ * @param image the image to scale
+ * @param factor the scale to make the new image
+ * @param width the number of text cell columns for the destination image
+ * @param height the number of text cell rows for the destination image
+ * @param textWidth the width in pixels for one text cell
+ * @param textHeight the height in pixels for one text cell
+ */
+ private BufferedImage scaleImage(final BufferedImage image,
+ final double factor, final int width, final int height,
+ final int textWidth, final int textHeight) {
+
+ if ((scale == Scale.NONE) && (Math.abs(factor - 1.0) < 0.03)) {
+ // If we are within 3% of 1.0, just return the original image.
+ return image;
+ }
+
+ int destWidth = 0;
+ int destHeight = 0;
+ int x = 0;
+ int y = 0;
+
+ BufferedImage newImage = null;
+
+ switch (scale) {
+ case NONE:
+ destWidth = (int) (image.getWidth() * factor);
+ destHeight = (int) (image.getHeight() * factor);
+ newImage = new BufferedImage(destWidth, destHeight,
+ BufferedImage.TYPE_INT_ARGB);
+ break;
+ case STRETCH:
+ destWidth = width * textWidth;
+ destHeight = height * textHeight;
+ newImage = new BufferedImage(destWidth, destHeight,
+ BufferedImage.TYPE_INT_ARGB);
+ break;
+ case SCALE:
+ double a = (double) image.getWidth() / image.getHeight();
+ double b = (double) (width * textWidth) / (height * textHeight);
+ assert (a > 0);
+ assert (b > 0);
+
+ /*
+ System.err.println("Scale: original " + image.getWidth() +
+ "x" + image.getHeight());
+ System.err.println(" screen " + (width * textWidth) +
+ "x" + (height * textHeight));
+ System.err.println("A " + a + " B " + b);
+ */
+
+ if (a > b) {
+ // Horizontal letterbox
+ destWidth = width * textWidth;
+ destHeight = (int) (destWidth / a);
+ y = ((height * textHeight) - destHeight) / 2;
+ assert (y >= 0);
+ /*
+ System.err.println("Horizontal letterbox: " + destWidth +
+ "x" + destHeight + ", Y offset " + y);
+ */
+ } else {
+ // Vertical letterbox
+ destHeight = height * textHeight;
+ destWidth = (int) (destHeight * a);
+ x = ((width * textWidth) - destWidth) / 2;
+ assert (x >= 0);
+ /*
+ System.err.println("Vertical letterbox: " + destWidth +
+ "x" + destHeight + ", X offset " + x);
+ */
+ }
+ newImage = new BufferedImage(width * textWidth, height * textHeight,
+ BufferedImage.TYPE_INT_ARGB);
+ break;
+ }
+
+ java.awt.Graphics gr = newImage.createGraphics();
+ if (scale == Scale.SCALE) {
+ gr.setColor(scaleBackColor);
+ gr.fillRect(0, 0, width * textWidth, height * textHeight);
+ }
+ gr.drawImage(image, x, y, destWidth, destHeight, null);
+ gr.dispose();
+ return newImage;
+ }
+
+ /**
+ * Rotate an image either clockwise or counterclockwise.
+ *
+ * @param image the image to scale
+ * @param clockwise number of turns clockwise
+ */
+ private BufferedImage rotateImage(final BufferedImage image,
+ final int clockwise) {
+
+ if (clockwise % 4 == 0) {
+ return image;
+ }
+
+ BufferedImage newImage = null;
+
+ if (clockwise % 4 == 1) {
+ // 90 degrees clockwise
+ newImage = new BufferedImage(image.getHeight(), image.getWidth(),
+ BufferedImage.TYPE_INT_ARGB);
+ for (int x = 0; x < image.getWidth(); x++) {
+ for (int y = 0; y < image.getHeight(); y++) {
+ newImage.setRGB(y, x,
+ image.getRGB(x, image.getHeight() - 1 - y));
+ }
+ }
+ } else if (clockwise % 4 == 2) {
+ // 180 degrees clockwise
+ newImage = new BufferedImage(image.getWidth(), image.getHeight(),
+ BufferedImage.TYPE_INT_ARGB);
+ for (int x = 0; x < image.getWidth(); x++) {
+ for (int y = 0; y < image.getHeight(); y++) {
+ newImage.setRGB(x, y,
+ image.getRGB(image.getWidth() - 1 - x,
+ image.getHeight() - 1 - y));
+ }
+ }
+ } else if (clockwise % 4 == 3) {
+ // 270 degrees clockwise
+ newImage = new BufferedImage(image.getHeight(), image.getWidth(),
+ BufferedImage.TYPE_INT_ARGB);
+ for (int x = 0; x < image.getWidth(); x++) {
+ for (int y = 0; y < image.getHeight(); y++) {
+ newImage.setRGB(y, x,
+ image.getRGB(image.getWidth() - 1 - x, y));
+ }
+ }
+ }
+
+ return newImage;
+ }
+
+}
git://git.nikiroo.be / fanfix.git / blobdiff