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Diffstat (limited to 'examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/graphics/CurvesTab.java')
-rw-r--r-- | examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/graphics/CurvesTab.java | 300 |
1 files changed, 0 insertions, 300 deletions
diff --git a/examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/graphics/CurvesTab.java b/examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/graphics/CurvesTab.java deleted file mode 100644 index 9784154828..0000000000 --- a/examples/org.eclipse.swt.examples/src/org/eclipse/swt/examples/graphics/CurvesTab.java +++ /dev/null @@ -1,300 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2006 IBM Corporation and others. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * IBM Corporation - initial API and implementation - *******************************************************************************/ - -package org.eclipse.swt.examples.graphics; - -import org.eclipse.swt.*; -import org.eclipse.swt.events.*; -import org.eclipse.swt.graphics.*; -import org.eclipse.swt.widgets.*; - -/** - * This tab presents cubic and quadratic curves that can be drawn. - * The user may reposition the cubic and quadratic handles. - */ -public class CurvesTab extends GraphicsTab { - /** These rectangles represent the handles on the curves. */ - private Rectangle quadHndl, quadEndHndl, cubHndl1, cubHndl2, cubEndHndl; - - /** These values represent the positions of the curves. */ - private float quadXPos, quadYPos, cubXPos, cubYPos; - - /** These values represent the x and y displacement of each handle. */ - private float quadDiffX, quadDiffY, quadEndDiffX, quadEndDiffY; - private float cubDiffX1, cubDiffY1, cubDiffX2, cubDiffY2, cubEndDiffX, cubEndDiffY; - - /** These are flags that indicate whether or not a handle has been moved. */ - private boolean quadPtMoved, quadEndPtMoved, cubPt1Moved, cubPt2Moved, cubEndPtMoved; - - private MouseMoveListener mouseMoveListener; - private MouseListener mouseListener; - private Cursor cursor; - - /** true if hovering over a handle, false otherwise */ - private boolean hovering = false; - - /** true if left mouse button is held down, false otherwise */ - private boolean mouseDown = false; - - -public CurvesTab(GraphicsExample example) { - super(example); - quadHndl = new Rectangle(200, 150, 5, 5); - quadEndHndl = new Rectangle(400, 0, 5, 5); - quadDiffX = quadDiffY = quadEndDiffX = quadEndDiffY = 0; - cubHndl1 = new Rectangle(133, -60, 5, 5); - cubHndl2 = new Rectangle(266, 60, 5, 5); - cubDiffX1 = cubDiffY1 = cubDiffX2 = cubDiffY2 = 0; - cubEndHndl = new Rectangle(400, 0, 5, 5); - cubEndDiffX = cubEndDiffY = 0; -} - -public String getCategory() { - return GraphicsExample.getResourceString("Curves"); //$NON-NLS-1$ -} - -public String getText() { - return GraphicsExample.getResourceString("Curves"); //$NON-NLS-1$ -} - -public String getDescription() { - return GraphicsExample.getResourceString("CurvesDescription"); //$NON-NLS-1$ -} - -public boolean getDoubleBuffered() { - return true; -} - -public void dispose() { - if (mouseListener != null) - example.canvas.removeMouseListener(mouseListener); - - if (mouseMoveListener != null) - example.canvas.removeMouseMoveListener(mouseMoveListener); - - if (cursor != null) { - cursor.dispose(); - cursor = null; - } -} - -/** - * This helper method determines whether or not the cursor is positioned - * over a handle. - * - * @param e - * A MouseEvent - * @return true if cursor is positioned over a handle; false otherwise - */ -private boolean isHovering(MouseEvent e) { - Rectangle quad = new Rectangle(quadHndl.x + (int)quadXPos - 1, quadHndl.y + (int)quadYPos - 1, quadHndl.width+2, quadHndl.height+2); - Rectangle quadEnd = new Rectangle(quadEndHndl.x + (int)quadXPos - 1, quadEndHndl.y + (int)quadYPos - 1, quadEndHndl.width+2, quadEndHndl.height+2); - Rectangle cub1 = new Rectangle(cubHndl1.x + (int)cubXPos - 1, cubHndl1.y + (int)cubYPos - 1, cubHndl1.width+2, cubHndl1.height+2); - Rectangle cub2 = new Rectangle(cubHndl2.x + (int)cubXPos - 1, cubHndl2.y + (int)cubYPos - 1, cubHndl2.width+2, cubHndl2.height+2); - Rectangle cubEnd = new Rectangle(cubEndHndl.x + (int)cubXPos - 1, cubEndHndl.y + (int)cubYPos - 1, cubEndHndl.width+2, cubEndHndl.height+2); - - return ( quad.contains(e.x, e.y) || quadEnd.contains(e.x, e.y) - || cub1.contains(e.x, e.y) || cub2.contains(e.x, e.y) - || cubEnd.contains(e.x, e.y)); -} -/** - * Creates the widgets used to control the drawing. - */ -public void createControlPanel(Composite parent) { - if (cursor == null) { - cursor = new Cursor(parent.getDisplay(), SWT.CURSOR_HAND); - } - - mouseMoveListener = new MouseMoveListener() { - - public void mouseMove(MouseEvent e) { - if (hovering && mouseDown) { - example.canvas.setCursor(cursor); - } else if (isHovering(e)) { - example.canvas.setCursor(cursor); - hovering = true; - } else { - example.canvas.setCursor(null); - hovering = false; - } - - if (quadPtMoved) { - quadDiffX = quadDiffX + e.x - (int)quadXPos - quadHndl.x; - quadDiffY = quadDiffY + e.y - (int)quadYPos - quadHndl.y; - quadHndl.x = e.x - (int)quadXPos; - quadHndl.y = e.y - (int)quadYPos; - } else if (quadEndPtMoved) { - quadEndDiffX = quadEndDiffX + e.x - (int)quadXPos - quadEndHndl.x; - quadEndDiffY = quadEndDiffY + e.y - (int)quadYPos - quadEndHndl.y; - quadEndHndl.x = e.x - (int)quadXPos; - quadEndHndl.y = e.y - (int)quadYPos; - } else if (cubPt1Moved) { - cubDiffX1 = cubDiffX1 + e.x - (int)cubXPos - cubHndl1.x; - cubDiffY1 = cubDiffY1 + e.y - (int)cubYPos - cubHndl1.y; - cubHndl1.x = e.x - (int)cubXPos; - cubHndl1.y = e.y - (int)cubYPos; - } else if (cubPt2Moved) { - cubDiffX2 = cubDiffX2 + e.x - (int)cubXPos - cubHndl2.x; - cubDiffY2 = cubDiffY2 + e.y - (int)cubYPos - cubHndl2.y; - cubHndl2.x = e.x - (int)cubXPos; - cubHndl2.y = e.y - (int)cubYPos; - } else if (cubEndPtMoved) { - cubEndDiffX = cubEndDiffX + e.x - (int)cubXPos - cubEndHndl.x; - cubEndDiffY = cubEndDiffY + e.y - (int)cubYPos - cubEndHndl.y; - cubEndHndl.x = e.x - (int)cubXPos; - cubEndHndl.y = e.y - (int)cubYPos; - } - example.redraw(); - } - }; - - mouseListener = new MouseListener() { - - public void mouseDoubleClick(MouseEvent e) {} - - /** - * Sent when a mouse button is pressed. - * - * @param e an event containing information about the mouse button press - */ - public void mouseDown(MouseEvent e) { - Rectangle quad = new Rectangle(quadHndl.x + (int)quadXPos - 1, quadHndl.y + (int)quadYPos - 1, quadHndl.width+2, quadHndl.height+2); - Rectangle quadEnd = new Rectangle(quadEndHndl.x + (int)quadXPos - 1, quadEndHndl.y + (int)quadYPos - 1, quadEndHndl.width+2, quadEndHndl.height+2); - Rectangle cub1 = new Rectangle(cubHndl1.x + (int)cubXPos - 1, cubHndl1.y + (int)cubYPos - 1, cubHndl1.width+2, cubHndl1.height+2); - Rectangle cub2 = new Rectangle(cubHndl2.x + (int)cubXPos - 1, cubHndl2.y + (int)cubYPos - 1, cubHndl2.width+2, cubHndl2.height+2); - Rectangle cubEnd = new Rectangle(cubEndHndl.x + (int)cubXPos - 1, cubEndHndl.y + (int)cubYPos - 1, cubEndHndl.width+2, cubEndHndl.height+2); - - if (quad.contains(e.x, e.y)) { - quadPtMoved = true; - mouseDown = true; - } else if (quadEnd.contains(e.x, e.y)) { - quadEndPtMoved = true; - mouseDown = true; - } else if (cub1.contains(e.x, e.y)) { - cubPt1Moved = true; - mouseDown = true; - } else if (cub2.contains(e.x, e.y)) { - cubPt2Moved = true; - mouseDown = true; - } else if (cubEnd.contains(e.x, e.y)) { - cubEndPtMoved = true; - mouseDown = true; - } - } - - /** - * Sent when a mouse button is released. - * - * @param e an event containing information about the mouse button release - */ - public void mouseUp(MouseEvent e) { - mouseDown = false; - if (isHovering(e)) { - example.canvas.setCursor(cursor); - } else { - example.canvas.setCursor(null); - } - - if (quadPtMoved) - quadPtMoved = false; - if (quadEndPtMoved) - quadEndPtMoved = false; - if (cubPt1Moved) - cubPt1Moved = false; - if (cubPt2Moved) - cubPt2Moved = false; - if (cubEndPtMoved) - cubEndPtMoved = false; - - example.redraw(); - } - }; - example.canvas.addMouseMoveListener(mouseMoveListener); - example.canvas.addMouseListener(mouseListener); -} - -public void paint(GC gc, int width, int height) { - if (!example.checkAdvancedGraphics()) return; - Device device = gc.getDevice(); - - Font font = new Font(device, getPlatformFont(), 16, SWT.ITALIC); - gc.setFont(font); - gc.setLineWidth(5); - - Transform transform; - - // ----- cubic curve ----- - cubXPos = width/5; - cubYPos = height/3; - - transform = new Transform(device); - transform.translate(cubXPos, cubYPos); - gc.setTransform(transform); - transform.dispose(); - - gc.setForeground(device.getSystemColor(SWT.COLOR_RED)); - gc.drawString(GraphicsExample.getResourceString("Cubic"), 25, -70, true); - - Path path = new Path(device); - path.cubicTo(133 + cubDiffX1, -60 + cubDiffY1, 266 + cubDiffX2, 60 + cubDiffY2, 400 + cubEndDiffX, 0 + cubEndDiffY); - gc.drawPath(path); - path.dispose(); - - gc.setTransform(null); - gc.setForeground(device.getSystemColor(SWT.COLOR_DARK_BLUE)); - gc.drawRectangle(cubHndl1.x + (int)cubXPos, cubHndl1.y + (int)cubYPos, cubHndl1.width, cubHndl1.height); - gc.drawRectangle(cubHndl2.x + (int)cubXPos, cubHndl2.y + (int)cubYPos, cubHndl2.width, cubHndl2.height); - gc.drawRectangle(cubEndHndl.x + (int)cubXPos, cubEndHndl.y + (int)cubYPos, cubEndHndl.width, cubEndHndl.height); - - // ----- quadratic curve ----- - quadXPos = width/5; - quadYPos = 2*height/3; - - transform = new Transform(device); - transform.translate(quadXPos, quadYPos); - gc.setTransform(transform); - transform.dispose(); - - gc.setForeground(device.getSystemColor(SWT.COLOR_GREEN)); - gc.drawString(GraphicsExample.getResourceString("Quadratic"), 0, -50, true); - - path = new Path(device); - path.quadTo(200 + quadDiffX, 150 + quadDiffY, 400 + quadEndDiffX, 0 + quadEndDiffY); - gc.drawPath(path); - path.dispose(); - - gc.setTransform(null); - gc.setForeground(device.getSystemColor(SWT.COLOR_GRAY)); - gc.drawRectangle(quadHndl.x + (int)quadXPos, quadHndl.y + (int)quadYPos, quadHndl.width, quadHndl.height); - gc.drawRectangle(quadEndHndl.x + (int)quadXPos, quadEndHndl.y + (int)quadYPos, quadEndHndl.width, quadEndHndl.height); - - font.dispose(); -} - -/** - * Returns the name of a valid font for the resident platform. - */ -static String getPlatformFont() { - if(SWT.getPlatform() == "win32") { - return "Arial"; - } else if (SWT.getPlatform() == "motif") { - return "Helvetica"; - } else if (SWT.getPlatform() == "gtk") { - return "Baekmuk Batang"; - } else if (SWT.getPlatform() == "carbon") { - return "Arial"; - } else { // photon, etc ... - return "Verdana"; - } -} - -} - |