--- /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 java.io.File;
+import java.io.IOException;
+import java.util.ResourceBundle;
+import javax.imageio.ImageIO;
+
+import jexer.event.TKeypressEvent;
+import jexer.event.TMouseEvent;
+import jexer.event.TResizeEvent;
+import static jexer.TKeypress.*;
+
+/**
+ * TImageWindow shows an image with scrollbars.
+ */
+public class TImageWindow extends TScrollableWindow {
+
+ /**
+ * Translated strings.
+ */
+ private static final ResourceBundle i18n = ResourceBundle.getBundle(TImageWindow.class.getName());
+
+ // ------------------------------------------------------------------------
+ // Constants --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * The number of lines to scroll on mouse wheel up/down.
+ */
+ private static final int wheelScrollSize = 3;
+
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Hang onto the TImage so I can resize it with the window.
+ */
+ private TImage imageField;
+
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Public constructor opens a file.
+ *
+ * @param parent the main application
+ * @param file the file to open
+ * @throws IOException if a java.io operation throws
+ */
+ public TImageWindow(final TApplication parent,
+ final File file) throws IOException {
+
+ this(parent, file, 0, 0, parent.getScreen().getWidth(),
+ parent.getDesktopBottom() - parent.getDesktopTop());
+ }
+
+ /**
+ * Public constructor opens a file.
+ *
+ * @param parent the main application
+ * @param file the file to open
+ * @param x column relative to parent
+ * @param y row relative to parent
+ * @param width width of window
+ * @param height height of window
+ * @throws IOException if a java.io operation throws
+ */
+ public TImageWindow(final TApplication parent, final File file,
+ final int x, final int y, final int width,
+ final int height) throws IOException {
+
+ super(parent, file.getName(), x, y, width, height, RESIZABLE);
+
+ BufferedImage image = ImageIO.read(file);
+
+ imageField = addImage(0, 0, getWidth() - 2, getHeight() - 2,
+ image, 0, 0);
+ setTitle(file.getName());
+
+ setupAfterImage();
+ }
+
+ /**
+ * Setup other fields after the image is created.
+ */
+ private void setupAfterImage() {
+ if (imageField.getRows() < getHeight() - 2) {
+ imageField.setHeight(imageField.getRows());
+ setHeight(imageField.getRows() + 2);
+ }
+ if (imageField.getColumns() < getWidth() - 2) {
+ imageField.setWidth(imageField.getColumns());
+ setWidth(imageField.getColumns() + 2);
+ }
+
+ hScroller = new THScroller(this,
+ Math.min(Math.max(0, getWidth() - 17), 17),
+ getHeight() - 2,
+ getWidth() - Math.min(Math.max(0, getWidth() - 17), 17) - 3);
+ vScroller = new TVScroller(this, getWidth() - 2, 0, getHeight() - 2);
+ setTopValue(0);
+ setBottomValue(imageField.getRows() - imageField.getHeight());
+ setLeftValue(0);
+ setRightValue(imageField.getColumns() - imageField.getWidth());
+
+ statusBar = newStatusBar(i18n.getString("statusBar"));
+ }
+
+ // ------------------------------------------------------------------------
+ // Event handlers ---------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Handle mouse press events.
+ *
+ * @param mouse mouse button press event
+ */
+ @Override
+ public void onMouseDown(final TMouseEvent mouse) {
+ // Use TWidget's code to pass the event to the children.
+ super.onMouseDown(mouse);
+
+ if (mouse.isMouseWheelUp()) {
+ imageField.setTop(imageField.getTop() - wheelScrollSize);
+ } else if (mouse.isMouseWheelDown()) {
+ imageField.setTop(imageField.getTop() + wheelScrollSize);
+ }
+ setVerticalValue(imageField.getTop());
+ }
+
+ /**
+ * Handle mouse release events.
+ *
+ * @param mouse mouse button release event
+ */
+ @Override
+ public void onMouseUp(final TMouseEvent mouse) {
+ // Use TWidget's code to pass the event to the children.
+ super.onMouseUp(mouse);
+
+ if (mouse.isMouse1() && mouseOnVerticalScroller(mouse)) {
+ // Clicked/dragged on vertical scrollbar
+ imageField.setTop(getVerticalValue());
+ }
+ if (mouse.isMouse1() && mouseOnHorizontalScroller(mouse)) {
+ // Clicked/dragged on horizontal scrollbar
+ imageField.setLeft(getHorizontalValue());
+ }
+ }
+
+ /**
+ * Method that subclasses can override to handle mouse movements.
+ *
+ * @param mouse mouse motion event
+ */
+ @Override
+ public void onMouseMotion(final TMouseEvent mouse) {
+ // Use TWidget's code to pass the event to the children.
+ super.onMouseMotion(mouse);
+
+ if (mouse.isMouse1() && mouseOnVerticalScroller(mouse)) {
+ // Clicked/dragged on vertical scrollbar
+ imageField.setTop(getVerticalValue());
+ }
+ if (mouse.isMouse1() && mouseOnHorizontalScroller(mouse)) {
+ // Clicked/dragged on horizontal scrollbar
+ imageField.setLeft(getHorizontalValue());
+ }
+ }
+
+ /**
+ * Handle window/screen resize events.
+ *
+ * @param event resize event
+ */
+ @Override
+ public void onResize(final TResizeEvent event) {
+ if (event.getType() == TResizeEvent.Type.WIDGET) {
+ // Resize the image field
+ TResizeEvent imageSize = new TResizeEvent(TResizeEvent.Type.WIDGET,
+ event.getWidth() - 2, event.getHeight() - 2);
+ imageField.onResize(imageSize);
+
+ // Have TScrollableWindow handle the scrollbars
+ super.onResize(event);
+ return;
+ }
+
+ // Pass to children instead
+ for (TWidget widget: getChildren()) {
+ widget.onResize(event);
+ }
+ }
+
+ /**
+ * Handle keystrokes.
+ *
+ * @param keypress keystroke event
+ */
+ @Override
+ public void onKeypress(final TKeypressEvent keypress) {
+ if (keypress.equals(kbUp)) {
+ verticalDecrement();
+ imageField.setTop(getVerticalValue());
+ return;
+ }
+ if (keypress.equals(kbDown)) {
+ verticalIncrement();
+ imageField.setTop(getVerticalValue());
+ return;
+ }
+ if (keypress.equals(kbPgUp)) {
+ bigVerticalDecrement();
+ imageField.setTop(getVerticalValue());
+ return;
+ }
+ if (keypress.equals(kbPgDn)) {
+ bigVerticalIncrement();
+ imageField.setTop(getVerticalValue());
+ return;
+ }
+ if (keypress.equals(kbRight)) {
+ horizontalIncrement();
+ imageField.setLeft(getHorizontalValue());
+ return;
+ }
+ if (keypress.equals(kbLeft)) {
+ horizontalDecrement();
+ imageField.setLeft(getHorizontalValue());
+ return;
+ }
+
+ // We did not take it, let the TImage instance see it.
+ super.onKeypress(keypress);
+
+ setVerticalValue(imageField.getTop());
+ setBottomValue(imageField.getRows() - imageField.getHeight());
+ setHorizontalValue(imageField.getLeft());
+ setRightValue(imageField.getColumns() - imageField.getWidth());
+ }
+
+ // ------------------------------------------------------------------------
+ // TWindow ----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Draw the window.
+ */
+ @Override
+ public void draw() {
+ // Draw as normal.
+ super.draw();
+
+ // We have to get the scrollbar values after we have let the image
+ // try to draw.
+ setBottomValue(imageField.getRows() - imageField.getHeight());
+ setRightValue(imageField.getColumns() - imageField.getWidth());
+ }
+
+}
git://git.nikiroo.be / fanfix.git / blobdiff