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gregyouree
Joined: 10 Oct 2007
Posts: 13
Location: Atlanta
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 Posted: Sun Jan 20, 2008 6:53 pm Post subject: Ext Listeners |
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I use some of the Drag and Drop listeners in the PortalDropZone, http://milescript.org/portaldemosource/PortalDropZone.html, class.
| Code: |
DropTargetConfig targetConfig = new DropTargetConfig{
ddScrollConfig: ddscroll,
notifyOver: notifyOver,
notifyOut: notifyOut,
notifyDrop: notifyDrop
};
target = new DropTarget(panel.body.dom, targetConfig);
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And here is the definition of the above methods from the same class.
| Code: |
private String notifyOver(DragSource dd, EventObject e, Object data) {
Array<int> xy = e.getXY();
PanelProxy px = (PanelProxy)dd.getProxy();
// case column widths
if(this.grid == null) {
this.grid = this.getGrid();
}
// handle case scroll where scrollbars appear during drag
int cw = panel.body.dom.clientWidth;
if(this.lastCW == null) {
this.lastCW = cw;
} else if(this.lastCW != cw) {
this.lastCW = cw;
panel.doLayout();
this.grid = this.getGrid();
}
// determine column
int col = 0;
Array<PortalBox> xs = this.grid.columnX;
boolean cmatch = false;
for(int len = xs.length; len > col; col++) {
if(xy[0] < (xs[col].x + xs[col].w)) {
cmatch = true;
break;
}
}
// no match fix last index
if(!cmatch) {
col--;
}
// find insertion position
Component p = null;
boolean match = false;
int pos = 0;
Container c = (Container)panel.items.itemAt(col);
Array<Component> items = c.items.items;
for(int len = items.length; len > pos; pos++) {
p = items[pos];
int h = p.getEl().getHeight();
int temp = (p.getEl().getY()+(h/2));
if(h !== 0 && temp > xy[1]) {
match = true;
break;
}
}
int posVal = pos;
if(!match || p == null) {
posVal = c.items.getCount();
}
PortalEvent overEvent = new PortalEvent(panel, dd, e, data, col, c, posVal, target.dropAllowed);
if(panel.fireEvent("validatedrop", overEvent) !== false &&
panel.fireEvent("beforedragover", overEvent) !== false) {
// make sure proxy width is fluid
px.getProxy().setWidth("auto");
if(p != null) {
if(match) {
px.moveProxy(p.getEl().dom.parentNode, p.getEl().dom);
} else {
px.moveProxy(p.getEl().dom.parentNode, null);
}
} else {
px.moveProxy(c.getEl().dom, null);
}
if(!match || p == null) {
this.lastPos = new PortalPos(c, col, null);
} else {
this.lastPos = new PortalPos(c, col, pos);
}
this.scrollPos = panel.body.getScroll();
return overEvent.status;
} else {
return overEvent.status;
}
}
private void notifyOut() {
this.grid = null;
}
private void notifyDrop(DragSource dd, EventObject e, Object data) {
this.grid = null;
PanelProxy px = (PanelProxy)dd.getProxy();
Container c = this.lastPos.c;
int col = this.lastPos.col;
int pos = c.items.getCount();
if(this.lastPos.p != null) {
pos = this.lastPos.p;
}
PortalEvent dropEvent = new PortalEvent(panel, dd, e, data, col, c, pos, target.dropAllowed);
if(this.panel.fireEvent('validatedrop', dropEvent) !== false &&
this.panel.fireEvent('beforedrop', dropEvent) !== false) {
if(px.getEl() != null) {
px.getEl().remove();
px.panel.getEl().dom.parentNode.removeChild(px.panel.getEl().dom);
}
if(pos !== null){
c.insert(pos, px.panel);
}else{
c.add(px.panel);
}
c.doLayout();
panel.fireEvent('drop', dropEvent);
// scroll position is lost on drop, fix it
this.st = this.scrollPos.top;
if(st != null){
window.setTimeout(timeoutFunc, 10);
}
}
} |
I believe this is what you're talking about but I could be wrong.
_________________
--
Greg Youree
Co-founder
Point5u, LLC
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krycek
Joined: 17 Jan 2008
Posts: 10
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| Posted: Sun Jan 20, 2008 8:21 pm Post subject: |
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I mean like: element.on ("EVENT", function, scope);
Tomorrow I'll take a closer look!
Thank you for your help!
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gregyouree
Joined: 10 Oct 2007
Posts: 13
Location: Atlanta
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| Posted: Sun Jan 20, 2008 8:30 pm Post subject: Ext Listeners |
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Ah I see. That should work fine. You can pass a Function as a reference in Milescript. We recommend wrapping them in Delegates for clarity but it is not always necessary. I just pass the Functions directly a lot of the time, especially to external classes.
Glad to help out, let us know how it goes.
_________________
--
Greg Youree
Co-founder
Point5u, LLC
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