jfig.canvas
Class TopLeftRulerCanvas

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

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

Direct Known Subclasses:

AWTObjectCanvas

public class TopLeftRulerCanvas

extends FigBasicCanvas

object canvas with rulers on the top and left sides.

See Also:

FigCanvas, 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

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

TopLeftRulerCanvas()
TopLeftRulerCanvas

Method Summary

void	drawGrid(java.awt.Graphics gridGR) Actually draw the grid, assuming that the offscreenBuffers are already created and of the right size.
void	drawRulers(java.awt.Graphics g) drawRulers: draw the scale rulers on top and the right side of the canvas.
void	drawSlidersOnce(java.awt.Graphics g, int x, int y) drawSlidersOnce: internal helper function to draw the sliders/cross-hatch at position (x,y).
static void	main(java.lang.String[] argv) main(): simple self test of FigBasicCanvas inside a Frame.
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.
void	setRulerOffsets() calculate the offsets required when using rulers on this canvas.

Methods inherited from class jfig.canvas.FigBasicCanvas

addCanvasListener, addZoomListener, blitOffscreenBuffer, blitOffscreenBufferClipped, canvasSizeChanged, changeRubberbandMode, changeRubberbandMode, changeRubberbandMode, clearBuffer, clippedDrawTmpObject, doFullRedraw_deadlocks, doFullRedraw, doFullRedraw, doMotionRedraw, doObjectRedraw, doPanning, doSimpleRedraw, doSyncRedraw, doSystemRedraw, doTextRedraw, doToggleRubberbandDebug, doZoom11, doZoomFit, doZoomFull, doZoomIn, doZoomOut, doZoomRegion, drawAllObjects, drawGridByHand, drawGridViaCopyArea, drawObject, drawSliders, drawSlidersAndCursor, 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, mouseClicked, mouseDragged, mouseEntered, mouseExited, mouseMoved, 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, 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

Constructor Detail

TopLeftRulerCanvas

public TopLeftRulerCanvas()

TopLeftRulerCanvas

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

Method Detail

setRulerOffsets

public void setRulerOffsets()

Description copied from interface: FigCanvas

calculate the offsets required when using rulers on this canvas. For example, the basic xfig-compatibly canvas uses rulers on the top and right sides of the canvas, and Graphics operations might want to clip drawing operations only to the central part of the canvas.

Specified by:

setRulerOffsets in interface FigCanvas

Overrides:

setRulerOffsets in class FigBasicCanvas

drawGrid

public void drawGrid(java.awt.Graphics gridGR)

Actually draw the grid, assuming that the offscreenBuffers are already created and of the right size. This function blocks the editor for a possibly long time. The gridMode is taken from trafo.gridMode. The typical grid spacing is one point every 1cm of screen spacing.

Overrides:

drawGrid in class FigBasicCanvas

Parameters:

gridGR - the Graphics for drawing.

drawRulers

public void drawRulers(java.awt.Graphics g)

drawRulers: draw the scale rulers on top and the right side of the canvas. Both rules are labelled every 2cm (approx), and 10 ticks are drawn between two labels. The labels drawn are either in mm or in inches spacing, depending on the value of FigTrafo2D.units.

Overrides:

drawRulers in class FigBasicCanvas

drawSlidersOnce

public void drawSlidersOnce(java.awt.Graphics g,
                            int x,
                            int y)

drawSlidersOnce: internal helper function to draw the sliders/cross-hatch at position (x,y).

Overrides:

drawSlidersOnce in class FigBasicCanvas

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

main

public static void main(java.lang.String[] argv)

Description copied from class: FigBasicCanvas

main(): simple self test of FigBasicCanvas inside a Frame.