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/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.terminal.gwt.client;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.FlowPanel;
import com.vaadin.terminal.gwt.client.ui.VOverlay;
/**
* TODO open for extension
*/
public class VTooltip extends VOverlay {
private static final String CLASSNAME = "v-tooltip";
private static final int MARGIN = 4;
public static final int TOOLTIP_EVENTS = Event.ONKEYDOWN
| Event.ONMOUSEOVER | Event.ONMOUSEOUT | Event.ONMOUSEMOVE
| Event.ONCLICK;
protected static final int MAX_WIDTH = 500;
private static final int QUICK_OPEN_TIMEOUT = 1000;
private static final int CLOSE_TIMEOUT = 300;
private static final int OPEN_DELAY = 750;
private static final int QUICK_OPEN_DELAY = 100;
VErrorMessage em = new VErrorMessage();
Element description = DOM.createDiv();
private ComponentConnector tooltipOwner;
private boolean closing = false;
private boolean opening = false;
private ApplicationConnection ac;
// Open next tooltip faster. Disabled after 2 sec of showTooltip-silence.
private boolean justClosed = false;
// If this is "additional" tooltip, this field contains the key for it
private Object tooltipKey;
public VTooltip(ApplicationConnection client) {
super(false, false, true);
ac = client;
setStyleName(CLASSNAME);
FlowPanel layout = new FlowPanel();
setWidget(layout);
layout.add(em);
DOM.setElementProperty(description, "className", CLASSNAME + "-text");
DOM.appendChild(layout.getElement(), description);
setSinkShadowEvents(true);
}
/**
* Show a popup containing the information in the "info" tooltip
*
* @param info
*/
private void show(TooltipInfo info) {
boolean hasContent = false;
if (info.getErrorMessage() != null) {
em.setVisible(true);
em.updateMessage(info.getErrorMessage());
hasContent = true;
} else {
em.setVisible(false);
}
if (info.getTitle() != null && !"".equals(info.getTitle())) {
DOM.setInnerHTML(description, info.getTitle());
DOM.setStyleAttribute(description, "display", "");
hasContent = true;
} else {
DOM.setInnerHTML(description, "");
DOM.setStyleAttribute(description, "display", "none");
}
if (hasContent) {
// Issue #8454: With IE7 the tooltips size is calculated based on
// the last tooltip's position, causing problems if the last one was
// in the right or bottom edge. For this reason the tooltip is moved
// first to 0,0 position so that the calculation goes correctly.
setPopupPosition(0, 0);
setPopupPositionAndShow(new PositionCallback() {
public void setPosition(int offsetWidth, int offsetHeight) {
if (offsetWidth > MAX_WIDTH) {
setWidth(MAX_WIDTH + "px");
// Check new height and width with reflowed content
offsetWidth = getOffsetWidth();
offsetHeight = getOffsetHeight();
}
int x = tooltipEventMouseX + 10 + Window.getScrollLeft();
int y = tooltipEventMouseY + 10 + Window.getScrollTop();
if (x + offsetWidth + MARGIN - Window.getScrollLeft() > Window
.getClientWidth()) {
x = Window.getClientWidth() - offsetWidth - MARGIN;
}
if (y + offsetHeight + MARGIN - Window.getScrollTop() > Window
.getClientHeight()) {
y = tooltipEventMouseY - 5 - offsetHeight;
if (y - Window.getScrollTop() < 0) {
// tooltip does not fit on top of the mouse either,
// put it at the top of the screen
y = Window.getScrollTop();
}
}
setPopupPosition(x, y);
sinkEvents(Event.ONMOUSEOVER | Event.ONMOUSEOUT);
}
});
} else {
hide();
}
}
public void showTooltip(ComponentConnector owner, Event event, Object key) {
if (closing && tooltipOwner == owner && tooltipKey == key) {
// return to same tooltip, cancel closing
closeTimer.cancel();
closing = false;
justClosedTimer.cancel();
justClosed = false;
return;
}
if (closing) {
closeNow();
}
updatePosition(event);
if (opening) {
showTimer.cancel();
}
tooltipOwner = owner;
tooltipKey = key;
// Schedule timer for showing the tooltip according to if it was
// recently closed or not.
if (justClosed) {
showTimer.schedule(QUICK_OPEN_DELAY);
} else {
showTimer.schedule(OPEN_DELAY);
}
opening = true;
}
private void closeNow() {
if (closing) {
hide();
tooltipOwner = null;
setWidth("");
closing = false;
}
}
private Timer showTimer = new Timer() {
@Override
public void run() {
TooltipInfo info = ac.getTooltipTitleInfo(tooltipOwner, tooltipKey);
if (null != info) {
show(info);
}
opening = false;
}
};
private Timer closeTimer = new Timer() {
@Override
public void run() {
closeNow();
justClosedTimer.schedule(2000);
justClosed = true;
}
};
private Timer justClosedTimer = new Timer() {
@Override
public void run() {
justClosed = false;
}
};
public void hideTooltip() {
if (opening) {
showTimer.cancel();
opening = false;
tooltipOwner = null;
}
if (!isAttached()) {
return;
}
if (closing) {
// already about to close
return;
}
closeTimer.schedule(CLOSE_TIMEOUT);
closing = true;
justClosed = true;
justClosedTimer.schedule(QUICK_OPEN_TIMEOUT);
}
private int tooltipEventMouseX;
private int tooltipEventMouseY;
public void updatePosition(Event event) {
tooltipEventMouseX = DOM.eventGetClientX(event);
tooltipEventMouseY = DOM.eventGetClientY(event);
}
public void handleTooltipEvent(Event event, ComponentConnector owner,
Object key) {
final int type = DOM.eventGetType(event);
if ((VTooltip.TOOLTIP_EVENTS & type) == type) {
if (type == Event.ONMOUSEOVER) {
showTooltip(owner, event, key);
} else if (type == Event.ONMOUSEMOVE) {
updatePosition(event);
} else {
hideTooltip();
}
} else {
// non-tooltip event, hide tooltip
hideTooltip();
}
}
@Override
public void onBrowserEvent(Event event) {
final int type = DOM.eventGetType(event);
// cancel closing event if tooltip is mouseovered; the user might want
// to scroll of cut&paste
switch (type) {
case Event.ONMOUSEOVER:
closeTimer.cancel();
closing = false;
break;
case Event.ONMOUSEOUT:
hideTooltip();
break;
default:
// NOP
}
}
}
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