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Add marquee (scrolling text) support for MaterialToolbar #4599

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Add marquee (scrolling text) support for MaterialToolbar #4599

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4021284
MaterialToolbar: Implement marquee logic
Ishan09811 Feb 12, 2025
234c826
public: Add ``titleMarqueeEnabled`` attribute
Ishan09811 Feb 12, 2025
9807d04
TopAppBar: update docs
Ishan09811 Mar 3, 2025
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1 change: 1 addition & 0 deletions docs/components/TopAppBar.md
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Original file line number Diff line number Diff line change
Expand Up @@ -387,6 +387,7 @@ Element | Attr
**`MaterialToolbar` title typography** | `app:titleTextAppearance` | `setTitleTextAppearance` | `?attr/textAppearanceTitleLarge`
**`MaterialToolbar` subtitle typography** | `app:subtitleTextAppearance` | `setSubtitleTextAppearance` | `?attr/textAppearanceTitleMedium`
**`MaterialToolbar` title centering** | `app:titleCentered` | `setTitleCentered` | `false`
**`MaterialToolbar` title marquee** | `app:titleMarqueeEnabled` | `setTitleMarqueeEnabled` | `false`
**`MaterialToolbar` subtitle centering** | `app:subtitleCentered` | `setSubtitleCentered` | `false`
**`CollapsingToolbarLayout` collapsed title typography** | `app:collapsedTitleTextAppearance` | `setCollapsedTitleTextAppearance` | `?attr/textAppearanceTitleLarge`
**`CollapsingToolbarLayout` expanded title typography** | `app:expandedTitleTextAppearance` | `setExpandedTitleTextAppearance` | `?attr/textAppearanceHeadlineSmall` for Medium</br>`?attr/textAppearanceHeadlineMedium` for Large
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34 changes: 34 additions & 0 deletions lib/java/com/google/android/material/appbar/MaterialToolbar.java
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Expand Up @@ -83,6 +83,7 @@ public class MaterialToolbar extends Toolbar {
@Nullable private Integer navigationIconTint;
private boolean titleCentered;
private boolean subtitleCentered;
private boolean titleMarqueeEnabled;

@Nullable private ImageView.ScaleType logoScaleType;
@Nullable private Boolean logoAdjustViewBounds;
Expand Down Expand Up @@ -110,6 +111,7 @@ public MaterialToolbar(@NonNull Context context, @Nullable AttributeSet attrs, i

titleCentered = a.getBoolean(R.styleable.MaterialToolbar_titleCentered, false);
subtitleCentered = a.getBoolean(R.styleable.MaterialToolbar_subtitleCentered, false);
titleMarqueeEnabled = a.getBoolean(R.styleable.MaterialToolbar_titleMarqueeEnabled, false);

final int index = a.getInt(R.styleable.MaterialToolbar_logoScaleType, -1);
if (index >= 0 && index < LOGO_SCALE_TYPE_ARRAY.length) {
Expand Down Expand Up @@ -144,6 +146,7 @@ protected void onLayout(boolean changed, int left, int top, int right, int botto

maybeCenterTitleViews();
updateLogoImageView();
enableMarqueeIfNeeded();
}

private void maybeCenterTitleViews() {
Expand Down Expand Up @@ -228,6 +231,19 @@ private void updateLogoImageView() {
}
}

private void enableMarqueeIfNeeded() {
if (!titleMarqueeEnabled) return;

TextView titleTextView = ToolbarUtils.getTitleTextView(this);
if (titleTextView != null) {
titleTextView.setEllipsize(android.text.TextUtils.TruncateAt.MARQUEE);
titleTextView.setSingleLine(true);
titleTextView.setSelected(true);
titleTextView.setFocusable(true);
titleTextView.setFocusableInTouchMode(true);
}
}

/**
* Returns scale type of logo's ImageView
*
Expand Down Expand Up @@ -347,6 +363,24 @@ public boolean isTitleCentered() {
return titleCentered;
}

/**
* Sets whether the title text corresponding to the {@link #setTitle(int)} method should be
* marquee.
*/
public void setTitleMarqueeEnabled(boolean enabled) {
this.titleMarqueeEnabled = enabled;
requestLayout();
}

/**
* Returns whether the title text corresponding to the {@link #setTitle(int)} method is marquee or not.
*
* @see #setTitleMarqueeEnabled(boolean)
*/
public boolean isTitleMarqueeEnabled() {
return titleMarqueeEnabled;
}

/**
* Sets whether the subtitle text corresponding to the {@link #setSubtitle(int)} method should be
* centered horizontally within the toolbar.
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1 change: 1 addition & 0 deletions lib/java/com/google/android/material/appbar/res-public/values/public.xml
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Expand Up @@ -93,6 +93,7 @@
<public name="subtitleMaxLines" type="attr"/>
<public name="titleCentered" type="attr"/>
<public name="subtitleCentered" type="attr"/>
<public name="titleMarqueeEnabled" type="attr"/>
<public name="titlePositionInterpolator" type="attr"/>
<public name="logoAdjustViewBounds" type="attr"/>
<public name="logoScaleType" type="attr"/>
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