projects / deliverable / tracecompass.git / blame
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|---|---|---|
| 6e512b93 ASL |
1 | /******************************************************************************* |
| 2 | * Copyright (c) 2009 Ericsson | |
| 3 | * | |
| 4 | * All rights reserved. This program and the accompanying materials are | |
| 5 | * made available under the terms of the Eclipse Public License v1.0 which | |
| 6 | * accompanies this distribution, and is available at | |
| 7 | * http://www.eclipse.org/legal/epl-v10.html | |
| 8 | * | |
| 9 | * Contributors: | |
| 10 | * William Bourque - Initial API and implementation | |
| 11 | *******************************************************************************/ | |
| 12 | package org.eclipse.linuxtools.lttng.ui.views.histogram; | |
| 13 | ||
| 14 | import org.eclipse.swt.SWT; | |
| 15 | import org.eclipse.swt.events.KeyEvent; | |
| 16 | import org.eclipse.swt.events.KeyListener; | |
| 17 | ||
| 18 | /** | |
| 19 | * <b><u>HistogramCanvasKeyListener</u></b> | |
| 20 | * <p> | |
| 21 | * Implementation of a KeyListener for the need of the HistogramCanvas | |
| 22 | * <p> | |
| 23 | */ | |
| 24 | public class HistogramCanvasKeyListener implements KeyListener | |
| 25 | { | |
| f05aabed FC |
26 | private ParentHistogramCanvas parentCanvas = null; |
| 27 | private boolean isShiftPressed = false; | |
| 6e512b93 ASL |
28 | |
| 29 | /** | |
| 30 | * HistogramCanvasKeyListener constructor | |
| 31 | * | |
| 32 | * @param newCanvas Related canvas | |
| 33 | */ | |
| f05aabed | 34 | public HistogramCanvasKeyListener(ParentHistogramCanvas newCanvas) { |
| 6e512b93 ASL |
35 | parentCanvas = newCanvas; |
| 36 | } | |
| 37 | ||
| 38 | /** | |
| 39 | * Function that is called when a key is pressed.<p> | |
| 40 | * Possible actions : | |
| 41 | * - Left arrow : move the selection window left.<p> | |
| 42 | * - Right arrow : move the selection window right.<p> | |
| 43 | * - Shift : turn on "fast move" mode.<p> | |
| 44 | * | |
| 45 | * @param event The KeyEvent generated when the key was pressed. | |
| 46 | */ | |
| d4011df2 | 47 | @Override |
| 6e512b93 ASL |
48 | public void keyPressed(KeyEvent event) { |
| 49 | switch (event.keyCode) { | |
| 50 | case SWT.SHIFT: | |
| 51 | isShiftPressed = true; | |
| 52 | break; | |
| 53 | case SWT.ARROW_LEFT: | |
| 54 | moveWindowPosition(HistogramConstant.BASIC_DISPLACEMENT_FACTOR * -1); | |
| 55 | break; | |
| 56 | case SWT.ARROW_RIGHT: | |
| 57 | moveWindowPosition(HistogramConstant.BASIC_DISPLACEMENT_FACTOR); | |
| 58 | break; | |
| 59 | default: | |
| 60 | break; | |
| 61 | } | |
| 62 | } | |
| 63 | ||
| 64 | /** | |
| 65 | * Function that is called when a key is released.<p> | |
| 66 | * Possible actions : | |
| 67 | * - Shift : turn off "fast move" mode. | |
| 68 | * | |
| 69 | * @param event The KeyEvent generated when the key was pressed. | |
| 70 | */ | |
| d4011df2 | 71 | @Override |
| 6e512b93 ASL |
72 | public void keyReleased(KeyEvent event) { |
| 73 | switch (event.keyCode) { | |
| 74 | case SWT.SHIFT: | |
| 75 | isShiftPressed = false; | |
| 76 | break; | |
| 77 | default: | |
| 78 | break; | |
| 79 | } | |
| 80 | } | |
| 81 | ||
| 82 | /** | |
| 83 | * Function to move the window position of a given displacemnt.<p> | |
| 84 | * | |
| 85 | * @param displacementFactor The basic displacement to perform (positive or negative value) | |
| 86 | */ | |
| 1406f802 | 87 | public void moveWindowPosition(int displacementFactor) { |
| 6e512b93 ASL |
88 | |
| 89 | // If we are in "fast move mode", multiply the basic displacement by a factor | |
| 90 | if ( isShiftPressed == true ) { | |
| 91 | displacementFactor = (int)((double)displacementFactor * HistogramConstant.FAST_DISPLACEMENT_MULTIPLE); | |
| 92 | } | |
| 93 | ||
| 94 | parentCanvas.moveWindow(displacementFactor); | |
| 95 | } | |
| 96 | ||
| 97 | } |