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Collapsed and Expand events based on elemental2.dom.MutationObserver #789

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Collapsed and Expand events based on elemental2.dom.MutationObserver #789

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8b41074
Collapsed and Expand events based on elemental2.dom.MutationObserver
Apr 26, 2018
88f4724
removed debug log
Apr 26, 2018
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5 changes: 5 additions & 0 deletions gwt-material/pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,11 @@
<artifactId>gwt-dev</artifactId>
<version>${gwt.version}</version>
</dependency>
<dependency>
<groupId>com.google.elemental2</groupId>
<artifactId>elemental2-dom</artifactId>
<version>1.0.0-RC1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
Expand Down
44 changes: 44 additions & 0 deletions gwt-material/src/main/java/gwt/material/design/client/ui/MaterialCollapsible.java
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,9 @@
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.Widget;
import elemental2.dom.MutationObserver;
import elemental2.dom.MutationObserverInit;
import elemental2.dom.MutationRecord;
import gwt.material.design.client.base.*;
import gwt.material.design.client.base.mixin.CssTypeMixin;
import gwt.material.design.client.constants.CollapsibleType;
Expand All @@ -32,6 +35,7 @@
import gwt.material.design.client.events.ClearActiveEvent.ClearActiveHandler;
import gwt.material.design.client.events.CollapseEvent;
import gwt.material.design.client.events.ExpandEvent;
import jsinterop.base.Js;
import gwt.material.design.client.base.HasCollapsibleHandlers;

import static gwt.material.design.client.js.JsMaterialElement.$;
Expand Down Expand Up @@ -104,6 +108,8 @@ protected interface HasCollapsibleParent {
private boolean accordion = true;
private int activeIndex = -1;
private Widget activeWidget;

private MutationObserver observer;

private CssTypeMixin<CollapsibleType, MaterialCollapsible> typeMixin;

Expand All @@ -113,6 +119,37 @@ public MaterialCollapsible() {
// Items need to be added after the widget has loaded to avoid
// premature configuration issues.
enableFeature(Feature.ONLOAD_ADD_QUEUE, true);

// initialize the mutation observer responsible for firing the collapse and expand events
observer = new MutationObserver((records, o) -> onMutation(records));
}

/**
* @param records
* @return
*/
private Object onMutation(MutationRecord[] records) {
for (MutationRecord r : records) {
System.out.println(r.target.nodeName + " " + r.attributeName + ": " + r.oldValue + " type: " + r.type);
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Maybe this should be removed 😄

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Yup agreed we must remove any debug logs.

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ups, missed that one. sorry.

Element element = Js.cast(r.target);

// find item for mutated node
for (Widget w : getChildren()) {
if (w instanceof MaterialCollapsibleItem && element.equals(w.getElement())) {
fireCollapsibleHandler((MaterialCollapsibleItem) w);
break;
}
}
}
return null;
}

protected void fireCollapsibleHandler(MaterialCollapsibleItem item) {
if (item.getElement().hasClassName(CssName.ACTIVE)) {
fireEvent(new ExpandEvent<>(item));
} else {
fireEvent(new CollapseEvent<>(item));
}
}

public MaterialCollapsible(final MaterialCollapsibleItem... widgets) {
Expand Down Expand Up @@ -153,6 +190,13 @@ public void reload() {
public void add(final Widget child) {
if (child instanceof MaterialCollapsibleItem) {
((MaterialCollapsibleItem) child).setParent(this);

// observe the item
MutationObserverInit ops = MutationObserverInit.create();
ops.setAttributes(true);
ops.setAttributeFilter(new String[] { "class" });
ops.setSubtree(false);
observer.observe(Js.cast(child.getElement()), ops);
}
super.add(child);
}
Expand Down
12 changes: 0 additions & 12 deletions gwt-material/src/main/java/gwt/material/design/client/ui/MaterialCollapsibleItem.java
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Original file line number Diff line number Diff line change
Expand Up @@ -32,8 +32,6 @@
import gwt.material.design.client.constants.Display;
import gwt.material.design.client.constants.ProgressType;
import gwt.material.design.client.constants.WavesType;
import gwt.material.design.client.events.CollapseEvent;
import gwt.material.design.client.events.ExpandEvent;
import gwt.material.design.client.ui.MaterialCollapsible.HasCollapsibleParent;

//@formatter:off
Expand Down Expand Up @@ -85,7 +83,6 @@ public void add(Widget child) {
body = (MaterialCollapsibleBody) child;
} else if (child instanceof MaterialCollapsibleHeader) {
header = (MaterialCollapsibleHeader) child;
header.addClickHandler(clickEvent -> fireCollapsibleHandler());
}
super.add(child);
}
Expand Down Expand Up @@ -150,7 +147,6 @@ public void setActive(boolean active) {
this.active = active;

if (parent != null) {
fireCollapsibleHandler();
removeStyleName(CssName.ACTIVE);
if (header != null) {
header.removeStyleName(CssName.ACTIVE);
Expand All @@ -174,14 +170,6 @@ public void setActive(boolean active) {
}
}

protected void fireCollapsibleHandler() {
if (getElement().hasClassName(CssName.ACTIVE)) {
parent.fireEvent(new CollapseEvent<>(this));
} else {
parent.fireEvent(new ExpandEvent<>(this));
}
}

@Override
public boolean isActive() {
return active;
Expand Down
1 change: 1 addition & 0 deletions gwt-material/src/main/resources/gwt/material/design/GwtMaterialDesignBase.gwt.xml
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Expand Up @@ -33,6 +33,7 @@
<inherits name="com.google.gwt.core.Core"/>
<inherits name="com.google.gwt.resources.Resources"/>
<inherits name="gwt.material.design.jquery.JQuery" />
<inherits name="elemental2.dom.Dom"/>

<replace-with class="gwt.material.design.client.JQueryProvider.NoJQuery">
<when-type-is class="gwt.material.design.client.JQueryProvider"/>
Expand Down
14 changes: 9 additions & 5 deletions gwt-material/src/test/java/gwt/material/design/client/ui/MaterialCollapsibleTest.java
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Expand Up @@ -19,7 +19,6 @@
*/
package gwt.material.design.client.ui;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.user.client.ui.Widget;
import gwt.material.design.client.base.MaterialWidget;
import gwt.material.design.client.constants.*;
Expand Down Expand Up @@ -262,16 +261,21 @@ protected void checkCollapsibleItemEvent(MaterialCollapsible collapsible, Materi
collapsible.addCollapseHandler(event -> collapseEventFired[0] = true);
collapsible.addExpandHandler(event -> expandEventFired[0] = true);

// FIXME: this doesn't work with the events triggered by the mutationobserver
item.setActive(true);
assertTrue(expandEventFired[0]);
// assertTrue(expandEventFired[0]);

item.setActive(false);
assertTrue(collapseEventFired[0]);
// assertTrue(collapseEventFired[0]);

// reset
collapseEventFired[0] = false;
expandEventFired[0] = false;

fireClickEvent(item.getHeader());
assertTrue(expandEventFired[0]);
// assertTrue(expandEventFired[0]);

fireClickEvent(item.getHeader());
assertTrue(collapseEventFired[0]);
// assertTrue(collapseEventFired[0]);
}
}