jfig.canvas
Class PresentationViewerCanvas

java.lang.Object
  java.awt.Component
      java.awt.Canvas
          jfig.canvas.FigBasicCanvas
              jfig.canvas.PresentationViewerCanvas

All Implemented Interfaces:

javax.accessibility.Accessible, java.util.EventListener, FigCanvas, FullRedraw, java.awt.image.ImageObserver, java.awt.MenuContainer, java.awt.event.MouseListener, java.awt.event.MouseMotionListener, ObjectPainter, java.io.Serializable, SyncPainter

public class PresentationViewerCanvas

extends FigBasicCanvas

object canvas for the jfig presentation viewer.

PresentationViewerCanvas is the canvas for the jfig presentation viewer. It is realized as a simple subclass of FigBasicCanvas, that removes the rulers and some drag operations.

See Also:

FigBasicCanvas, Serialized Form

Nested Class Summary

Nested classes inherited from class jfig.canvas.FigBasicCanvas

FigBasicCanvas.Options2D

Nested classes inherited from class java.awt.Canvas

java.awt.Canvas.AccessibleAWTCanvas

Nested classes inherited from class java.awt.Component

java.awt.Component.AccessibleAWTComponent, java.awt.Component.BltBufferStrategy, java.awt.Component.FlipBufferStrategy

Field Summary

java.awt.Cursor

moveCursor

Fields inherited from class jfig.canvas.FigBasicCanvas

backgroundColor, BASE_ANCHOR_X, BASE_ANCHOR_Y, canvasListener, cur_height, cur_width, cur_x, cur_y, debug, defaultColor, defaultCursor, enableRulerDragging, enableTimingInfo, gridColor, gridGR, gridMode, gridVisible, hasRulers, helper, mouse_drag_x, mouse_drag_y, n_grid, n_redraws, n_trials_to_create_offscreenImage, n_updates, objectEnumerator, objectGR, offscreenGR, offscreenImage, old_x, old_y, pdbg, printer, ptmp, redrawMode, rubberband, RULER_XL_OFFSET, RULER_XR_OFFSET, RULER_YB_OFFSET, RULER_YT_OFFSET, rulerFont, t_delay, t_grid, t_grid_mean, t_redraw, t_redraw_mean, theObserver, tmp_sc, tmp_wc, trafo, waitCursor, zoomListenerVector

Fields inherited from class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields inherited from interface jfig.canvas.FigCanvas

FullRedraw, MouseMotionRedraw, NoChanges, ObjectRedraw, panDOWN, panHOME, panLEFT, panRIGHT, panUP, SyncRedraw, SystemRedraw, TmpObjectRedraw, TmpTextRedraw

Fields inherited from interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

PresentationViewerCanvas()
PresentationViewerCanvas

Method Summary

void	doPanning(int direction, boolean shift) automatic panning of the visible viewport on the world-coordinate system.
void	doZoomIn14() zoom in by a factor of sqrt(two).
void	doZoomOut07()
void	doZoomRegion(FigBbox bbox)
void	doZoomRegionFree(FigBbox bbox)
void	doZoomRegionSnapped(FigBbox bbox)
void	drawSliders(java.awt.Graphics g, boolean erase) draw the sliders to mark the current position.
void	drawSlidersAndCursor()
void	mouseDragged(java.awt.event.MouseEvent evt) Handle MouseDrag events: Currently, mouseDrag events are used for canvas panning.
void	mouseMoved(java.awt.event.MouseEvent evt) Handle mouseMove events: update sliders/cross hatch, provide rubberbanding
void	mousePressed(java.awt.event.MouseEvent evt) Handle mouseDown events: snap to the currently active grid, then call the parent mouseDown action function.
void	mouseReleased(java.awt.event.MouseEvent evt) mouseReleased() is used to detect mouseDrag() events.

Methods inherited from class jfig.canvas.FigBasicCanvas

addCanvasListener, addZoomListener, blitOffscreenBuffer, blitOffscreenBufferClipped, canvasSizeChanged, changeRubberbandMode, changeRubberbandMode, changeRubberbandMode, clearBuffer, clippedDrawTmpObject, doFullRedraw_deadlocks, doFullRedraw, doFullRedraw, doMotionRedraw, doObjectRedraw, doSimpleRedraw, doSyncRedraw, doSystemRedraw, doTextRedraw, doToggleRubberbandDebug, doZoom11, doZoomFit, doZoomFull, doZoomIn, doZoomOut, doZoomRegion, drawAllObjects, drawGrid, drawGridByHand, drawGridViaCopyArea, drawObject, drawRulers, drawSlidersAndCursor, drawSlidersOnce, drawTmpObjects, drawTriangles, eraseObject, err, flush, get_current_canvas_size, getBackground, getComponent, getCurrentCanvasSize, getDebug, getGridColor, getMousePosition, getObjectEnumerator, getOffscreenGraphics, getOptions2D, getRedrawMode, getTrafo, getViewportWCmax, getVisibleRegionBoundingBox_OLD, getVisibleRegionBoundingBox, gotFocus, handleRedraw, initializeOffscreenBuffers, isDoubleBuffered, main, mouseClicked, mouseEntered, mouseExited, msg, notifyZoomListeners, paint, paint, paint, print, printAll, printTimingStats, removeZoomListener, repaint, repaint, repaint, repaint, requestAntiAliasing, requestRenderQuality, setBackground, setConsole, setDebug, setDefaultCursor, setEnableRulerDragging, setGrid, setGridColor, setObjectEnumerator, setRubberbandAspect, setRubberbandBasePoint, setRubberbandBasePoint, setRubberbandBasePoint2, setRubberbandBasePoint2, setRubberbandShowLineLengths, setRulerOffsets, setStatusMessage, setTrafo, showRulers, statusMessage, synchronousRepaint, update

Methods inherited from class java.awt.Canvas

addNotify, createBufferStrategy, createBufferStrategy, getAccessibleContext, getBufferStrategy

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, getAlignmentX, getAlignmentY, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeys, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMinimumSize, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getParent, getPeer, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusCycleRoot, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, layout, list, list, list, list, list, locate, location, lostFocus, minimumSize, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, paramString, postEvent, preferredSize, prepareImage, prepareImage, processComponentEvent, processEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys, setFocusTraversalKeysEnabled, setFont, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface jfig.canvas.FigCanvas

getCursor, getSize, setCursor

Field Detail

moveCursor

public java.awt.Cursor moveCursor

Constructor Detail

PresentationViewerCanvas

public PresentationViewerCanvas()

PresentationViewerCanvas

The default viewer canvas doesn't use neither a grid nor snapping.

Method Detail

mousePressed

public void mousePressed(java.awt.event.MouseEvent evt)

Description copied from class: FigBasicCanvas

Handle mouseDown events: snap to the currently active grid, then call the parent mouseDown action function.

Specified by:

mousePressed in interface FigCanvas

Overrides:

mousePressed in class FigBasicCanvas

mouseReleased

public void mouseReleased(java.awt.event.MouseEvent evt)

Description copied from class: FigBasicCanvas

mouseReleased() is used to detect mouseDrag() events. On each mouseDown() and at the end of a mouseUp() we reset the values of the mouse_drag_(x,y) variables.

If both the current and the previous mouse_drag_(x,y) position lie in the rulers and differ by more than 5 pixels (to suppress small 'jitter'), we calculate the corresponding viewport panning.

In the future, we should probably provide some kind of visual feedback about the current drag amout by using mouseDrag() to update the rulers correspondingly.

Specified by:

mouseReleased in interface FigCanvas

Overrides:

mouseReleased in class FigBasicCanvas

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent evt)

Description copied from class: FigBasicCanvas

Handle mouseMove events: update sliders/cross hatch, provide rubberbanding

Specified by:

mouseMoved in interface FigCanvas

Overrides:

mouseMoved in class FigBasicCanvas

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent evt)

Description copied from class: FigBasicCanvas

Handle MouseDrag events: Currently, mouseDrag events are used for canvas panning. The (global) variables mouse_drag_(x,y) are set at each mouseDown() and mouseUp() event.

However, mouseDrag() at the moment is not used: The actual panning calculations are done in mouseUp(). We should probably provide visual feedback about the drag amout by redrawing the rulers in this function.

Specified by:

mouseDragged in interface FigCanvas

Overrides:

mouseDragged in class FigBasicCanvas

drawSlidersAndCursor

public void drawSlidersAndCursor()

drawSliders

public void drawSliders(java.awt.Graphics g,
                        boolean erase)

Description copied from class: FigBasicCanvas

draw the sliders to mark the current position. For performance reasons this function uses the global variables (old_x, old_y), (cur_x, cur_y) directly.

Overrides:

drawSliders in class FigBasicCanvas

doPanning

public void doPanning(int direction,
                      boolean shift)

automatic panning of the visible viewport on the world-coordinate system. Possible directions are left, right, up, down, and home. The amount of panning is 1/5th of the current viewport, or 1/50th with the SHIFT key pressed.

Specified by:

doPanning in interface FigCanvas

Overrides:

doPanning in class FigBasicCanvas

doZoomIn14

public void doZoomIn14()

zoom in by a factor of sqrt(two). Fixed point is the viewport center.

doZoomOut07

public void doZoomOut07()

doZoomRegionSnapped

public void doZoomRegionSnapped(FigBbox bbox)

doZoomRegionFree

public void doZoomRegionFree(FigBbox bbox)

doZoomRegion

public void doZoomRegion(FigBbox bbox)