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Added means by which a view can be scrolled to follow a path.

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git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1411 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Michael Bayne
2002-05-31 07:33:52 +00:00
parent 3261cff412
commit 823de4a1a0
1 changed files with 160 additions and 36 deletions
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src/java/com/threerings/media/MediaPanel.java
+160 -36
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@@ -1,5 +1,5 @@
//
// $Id: MediaPanel.java,v 1.8 2002/05/22 01:56:25 shaper Exp $
// $Id: MediaPanel.java,v 1.9 2002/05/31 07:33:52 mdb Exp $
package com.threerings.media;
@@ -7,6 +7,7 @@ import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Shape;
@@ -24,6 +25,9 @@ import com.samskivert.util.StringUtil;
import com.threerings.media.FrameManager;
import com.threerings.media.Log;
import com.threerings.media.util.Path;
import com.threerings.media.util.Pathable;
import com.threerings.media.animation.Animation;
import com.threerings.media.animation.AnimationManager;
@@ -116,6 +120,94 @@ public class MediaPanel extends JComponent
// ", millis=" + millis + "ms.");
}
/**
* Instructs the view to allow the supplied path to "scroll" it such
* that the center point of the view follows the supplied path. The
* supplied origin coordinates will be used to report our initial
* coordinates to the path and will be updated as the path "moves" us
* around.
*/
public void setPath (Path path, Point origin)
{
_path = path;
_porigin = origin;
_pathable = new Pathable() {
// documentation inherited from interface
public int getX () {
return _porigin.x;
}
// documentation inherited from interface
public int getY () {
return _porigin.y;
}
// documentation inherited from interface
public void setLocation (int x, int y) {
// make a note of the scrolling that we'll need to do to
// actually follow this path
_dx = x - _porigin.x;
_dy = y - _porigin.y;
// and update our origin
_porigin.x = x;
_porigin.y = y;
}
// documentation inherited from interface
public void setOrientation (int orient) {
MediaPanel.this.setOrientation(orient);
}
// documentation inherited from interface
public void pathBeginning () {
MediaPanel.this.pathBeginning();
}
// documentation inherited from interface
public void pathCompleted () {
MediaPanel.this.pathCompleted();
}
protected Point _offset;
};
_path.init(_pathable, System.currentTimeMillis());
}
/**
* If this media panel is following a path and that path attempts to
* set the orientation of the pathable it is controlling, this method
* will be called. Derived classes can override the method and effect
* whatever display of the panel's orientation they might desire.
*/
protected void setOrientation (int orient)
{
}
/**
* When the media panel is made to follow a path, this method is
* called when the path begins.
*/
protected void pathBeginning ()
{
}
/**
* When the media panel is made to follow a path, this method is
* called when the path ends. {@link #viewFinishedScrolling} will
* still be called (and is in fact called by this method).
*/
protected void pathCompleted ()
{
// we're all done; clear out our business
_path = null;
_pathable = null;
_porigin = null;
// call our standard callback
viewFinishedScrolling();
}
/**
* Pauses the sprites and animations that are currently active on this
* media panel. Also stops listening to the frame tick while paused.
@@ -141,6 +233,11 @@ public class MediaPanel extends JComponent
_animmgr.fastForward(delta);
_spritemgr.fastForward(delta);
// fast forward our path as well (if we have one)
if (_path != null) {
_path.fastForward(delta);
}
// clear out our pause time
_pauseTime = 0;
}
@@ -259,11 +356,10 @@ public class MediaPanel extends JComponent
}
int width = getWidth(), height = getHeight();
_dx = 0; _dy = 0;
// if scrolling is enabled, determine the scrolling delta to be
// used and do the business
_dx = 0;
_dy = 0;
if (_ttime != 0) {
// if we've blown past our allotted time, we want to scroll
// the rest of the way
@@ -290,44 +386,54 @@ public class MediaPanel extends JComponent
// ", lefty=" + (_scrolly-_dy) + "].");
}
// and add invalid rectangles for the exposed areas
if (_dx > 0) {
_remgr.invalidateRegion(width - _dx + _tx, _ty, _dx, height);
} else if (_dx < 0) {
_remgr.invalidateRegion(_tx, _ty, -_dx, height);
}
if (_dy > 0) {
_remgr.invalidateRegion(_tx, height - _dy + _ty, width, _dy);
} else if (_dy < 0) {
_remgr.invalidateRegion(_tx, _ty, width, -_dy);
// otherwise, if we're following a path, give that a chance to
// scroll us along
} else if (_path != null) {
// this will update our _dx and _dy if the path wishes us to
// scroll
_path.tick(_pathable, tickStamp);
}
// and add invalid rectangles for the exposed areas
if (_dx > 0) {
_remgr.invalidateRegion(width - _dx + _tx, _ty, _dx, height);
} else if (_dx < 0) {
_remgr.invalidateRegion(_tx, _ty, -_dx, height);
}
if (_dy > 0) {
_remgr.invalidateRegion(_tx, height - _dy + _ty, width, _dy);
} else if (_dy < 0) {
_remgr.invalidateRegion(_tx, _ty, width, -_dy);
}
// make sure we're really scrolling before telling people about it
if (_dx != 0 || _dy != 0) {
// if we are working with a sprite manager, let it know
// that we're about to scroll out from under its sprites
// and allow it to provide us with more dirty rects
if (_spritemgr != null) {
_spritemgr.viewWillScroll(_dx, _dy);
}
// make sure we're actually scrolling before telling people
// about it
if (_dx != 0 || _dy != 0) {
// if we are working with a sprite manager, let it know
// that we're about to scroll out from under its sprites
// and allow it to provide us with more dirty rects
if (_spritemgr != null) {
_spritemgr.viewWillScroll(_dx, _dy);
}
// let our derived classes do whatever they need to do to
// prepare to be scrolled
viewWillScroll(_dx, _dy, tickStamp);
// let our derived classes do whatever they need to do to
// prepare to be scrolled
viewWillScroll(_dx, _dy, tickStamp);
// keep track of the last time we scrolled
_last = tickStamp;
// keep track of the last time we scrolled
_last = tickStamp;
// subtract our scrolled deltas from the distance remaining
_scrollx -= _dx;
_scrolly -= _dy;
// subtract our scrolled deltas from the distance remaining
_scrollx -= _dx;
_scrolly -= _dy;
// if we've reached our desired position, finish the job
if (_scrollx == 0 && _scrolly == 0) {
_ttime = 0;
viewFinishedScrolling();
}
// if we've reached our desired position, finish the job; if
// we're being scrolled by a path, the path will let us know
// when we're done (via pathCompleted()) and that will trigger
// a call to viewFinishedScrolling()
if (_ttime != 0 && _scrollx == 0 && _scrolly == 0) {
_ttime = 0;
viewFinishedScrolling();
}
}
@@ -421,6 +527,15 @@ public class MediaPanel extends JComponent
// paint anything in front
paintInFront(gfx, dirty);
// if (_path != null) {
// Dimension vsize = getViewSize();
// int ox = _porigin.x - vsize.width/2;
// int oy = _porigin.y - vsize.height/2;
// gfx.translate(-ox, -oy);
// _path.paint(gfx);
// gfx.translate(ox, oy);
// }
// translate back out of happy space
gfx.translate(_tx, _ty);
}
@@ -552,6 +667,15 @@ public class MediaPanel extends JComponent
/** The last time we were scrolled. */
protected long _last;
/** The path we're following. */
protected Path _path;
/** The pathable we use to follow the path. */
protected Pathable _pathable;
/** The origin of the view as represented to the path. */
protected Point _porigin;
/** Used to correlate tick()s with paint()s. */
protected boolean _tickPaintPending = false;