AfflictionNetworks/narya
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Various and sundry revampage to make life easier when scrolling the media

Browse Source 
panel to follow a path.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1440 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Michael Bayne
2002-06-11 21:40:52 +00:00
parent d05d0c8558
commit 1a3ad13d6e
1 changed files with 128 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/java/com/threerings/media/MediaPanel.java
+128 -86
View File
@@ -1,5 +1,5 @@
//
// $Id: MediaPanel.java,v 1.11 2002/06/11 00:52:37 mdb Exp $
// $Id: MediaPanel.java,v 1.12 2002/06/11 21:40:52 mdb Exp $
package com.threerings.media;
@@ -129,50 +129,20 @@ public class MediaPanel extends JComponent
*/
public void setPath (Path path)
{
Dimension vsize = getViewSize();
_porigin.setLocation(vsize.width/2, vsize.height/2);
_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;
// 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();
}
};
_pathable = createPathable();
_path = path;
_path.init(_pathable, System.currentTimeMillis());
}
/**
* Creates a pathable that will be used to scroll the view along a
* path.
*/
protected Pathable createPathable ()
{
return new PanelPathable();
}
/**
* If this media panel is following a path and that path attempts to
* set the orientation of the pathable it is controlling, this method
@@ -356,42 +326,8 @@ 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
if (_ttime != 0) {
// if we've blown past our allotted time, we want to scroll
// the rest of the way
if (tickStamp > _ttime) {
_dx = _scrollx;
_dy = _scrolly;
// Log.info("Scrolling rest [dx=" + _dx + ", dy=" + _dy + "].");
} else {
// otherwise figure out how many milliseconds have gone by
// since we last scrolled and scroll the requisite amount
float dt = (float)(tickStamp - _last);
float rt = (float)(_ttime - _last);
// our delta is the remaining distance multiplied by the
// time delta divided by the remaining time
_dx = Math.round((float)(_scrollx * dt) / rt);
_dy = Math.round((float)(_scrolly * dt) / rt);
// Log.info("Scrolling delta [dt=" + dt + ", rt=" + rt +
// ", dx=" + _dx + ", dy=" + _dy +
// ", leftx=" + (_scrollx-_dx) +
// ", lefty=" + (_scrolly-_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);
}
// figure out if we should be scrolling and by how much
computeScrollDeltas(tickStamp);
// and add invalid rectangles for the exposed areas
if (_dx > 0) {
@@ -421,10 +357,6 @@ public class MediaPanel extends JComponent
// keep track of the last time we scrolled
_last = tickStamp;
// subtract our scrolled deltas from the distance remaining
_scrollx -= _dx;
_scrolly -= _dy;
// 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
@@ -444,6 +376,69 @@ public class MediaPanel extends JComponent
_tickPaintPending = true;
}
/**
* Called at the beginning of each tick, this method determines
* whether or not the view should be scrolled because of standard
* methods. These methods include a call to {@link #setScrolling} or a
* call to {@link #setPath} which causes the view to follow a path. A
* derived class could override this method to compute custom scroll
* deltas, which it would supply via a call to {@link
* #setScrollDeltas} at some point during the execution of the
* overridden method.
*/
protected void computeScrollDeltas (long tickStamp)
{
// if scrolling is enabled, determine the scrolling delta to be
// used and do the business
if (_ttime != 0) {
// if we've blown past our allotted time, we want to scroll
// the rest of the way
if (tickStamp > _ttime) {
setScrollDeltas(_scrollx, _scrolly);
// Log.info("Scrolling rest [dx=" + _dx + ", dy=" + _dy + "].");
} else {
// otherwise figure out how many milliseconds have gone by
// since we last scrolled and scroll the requisite amount
float dt = (float)(tickStamp - _last);
float rt = (float)(_ttime - _last);
// our delta is the remaining distance multiplied by the
// time delta divided by the remaining time
setScrollDeltas(Math.round((float)(_scrollx * dt) / rt),
Math.round((float)(_scrolly * dt) / rt));
// Log.info("Scrolling delta [dt=" + dt + ", rt=" + rt +
// ", dx=" + _dx + ", dy=" + _dy +
// ", leftx=" + (_scrollx-_dx) +
// ", lefty=" + (_scrolly-_dy) + "].");
}
// subtract our scrolled deltas from the distance remaining
_scrollx -= _dx;
_scrolly -= _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);
}
}
/**
* This can be called by derived classes during the beginning of the
* tick to instruct the view to scroll by the specified amount on the
* tick in question.
*/
protected void setScrollDeltas (int dx, int dy)
{
_dx = dx;
_dy = dy;
}
/**
* We want to be painted every tick.
*/
@@ -527,8 +522,8 @@ public class MediaPanel extends JComponent
// if (_path != null) {
// Dimension vsize = getViewSize();
// int ox = _porigin.x - vsize.width/2;
// int oy = _porigin.y - vsize.height/2;
// int ox = _pathable.getX() - vsize.width/2;
// int oy = _pathable.getY() - vsize.height/2;
// gfx.translate(-ox, -oy);
// _path.paint(gfx);
// gfx.translate(ox, oy);
@@ -635,6 +630,56 @@ public class MediaPanel extends JComponent
return getSize();
}
/**
* Used when causing the view to follow a path.
*/
protected class PanelPathable implements Pathable
{
public PanelPathable ()
{
Dimension vsize = getViewSize();
_porigin = new Point(vsize.width/2, vsize.height/2);
}
// 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
setScrollDeltas(x - _porigin.x, y - _porigin.y);
// 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 _porigin;
}
/** The frame manager with whom we register. */
protected FrameManager _framemgr;
@@ -671,9 +716,6 @@ public class MediaPanel extends JComponent
/** The pathable we use to follow the path. */
protected Pathable _pathable;
/** The origin of the view as represented to the path. */
protected Point _porigin = new Point();
/** Used to correlate tick()s with paint()s. */
protected boolean _tickPaintPending = false;