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Commit 3c914937 authored by chihhangchuang's avatar chihhangchuang
Browse files

Scale the preview content from full preview size to match the container size 

Screenshot:
  - Full preview: https://screenshot.googleplex.com/ngtQivW5PcM.png
  - Small preview: https://screenshot.googleplex.com/sEy6UMQnJ7M.png
Video: https://drive.google.com/file/d/1S4ng6NlBN19VGHQSLCVL1_28NR7UvX6k/view?usp=sharing
Known issue in the video: the text size will change per selected theme, and then push down the bottom components, will fix later.

Test: Manually
Bug: 146475648
Bug: 151286773
Change-Id: I9063efa9ee2418f2b76c2d17a2e539a5e4acbe8b
parent f3b04d68

src/com/android/customization/picker/theme/ThemeOptionPreviewer.java

+73 −1
Original line number Diff line number Diff line
@@ -15,11 +15,17 @@ 
 */

package com.android.customization.picker.theme;



import static android.view.View.MeasureSpec.EXACTLY;

import static android.view.View.MeasureSpec.makeMeasureSpec;



import android.content.Context;

import android.content.res.ColorStateList;

import android.content.res.Resources;

import android.graphics.Typeface;

import android.graphics.drawable.Drawable;

import android.graphics.drawable.GradientDrawable;

import android.util.DisplayMetrics;

import android.util.TypedValue;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;
@@ -38,6 +44,7 @@ import com.android.customization.model.theme.ThemeBundle; 
import com.android.customization.model.theme.ThemeBundle.PreviewInfo;

import com.android.customization.picker.TimeTicker;

import com.android.wallpaper.R;

import com.android.wallpaper.util.ScreenSizeCalculator;



import java.text.DateFormat;

import java.text.FieldPosition;
@@ -95,9 +102,46 @@ class ThemeOptionPreviewer implements LifecycleObserver { 


        mContext = context;

        mContentView = LayoutInflater.from(context).inflate(

                R.layout.theme_preview_content_v2, previewContainer);

                R.layout.theme_preview_content_v2, /* root= */ null);

        mClock = mContentView.findViewById(R.id.theme_preview_clock);

        updateTime();

        final float screenAspectRatio =

                ScreenSizeCalculator.getInstance().getScreenAspectRatio(mContext);

        previewContainer.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {

            @Override

            public void onLayoutChange(View view, int i, int i1, int i2, int i3, int i4, int i5,

                                       int i6, int i7) {

                // Calculate the full preview card height and width.

                int fullPreviewCardHeight = getFullPreviewCardHeight();

                int fullPreviewCardWidth = (int) (getFullPreviewCardHeight() / screenAspectRatio);



                // Relayout the content view to match full preview card size.

                mContentView.measure(

                        makeMeasureSpec(fullPreviewCardWidth, EXACTLY),

                        makeMeasureSpec(fullPreviewCardHeight, EXACTLY));

                mContentView.layout(0, 0, fullPreviewCardWidth, fullPreviewCardHeight);



                // Scale the content view from full preview size to the container size. For full

                // preview, the scale value is 1.

                float scale =

                        (float) previewContainer.getMeasuredHeight() / getFullPreviewCardHeight();

                mContentView.setScaleX(scale);

                mContentView.setScaleY(scale);

                // The pivot point is centered by default, set to (0, 0).

                mContentView.setPivotX(0f);

                mContentView.setPivotY(0f);



                // Ensure there's only one content view in the container.

                previewContainer.removeAllViews();

                // Finally, add the content view to the container.

                previewContainer.addView(

                        mContentView,

                        mContentView.getMeasuredWidth(),

                        mContentView.getMeasuredHeight());



                previewContainer.removeOnLayoutChangeListener(this);

            }

        });

    }



    /** Loads the Theme option into the container view. */
@@ -249,4 +293,32 @@ class ThemeOptionPreviewer implements LifecycleObserver { 
                }

        );

    }



    /**

     * Gets the screen height which does not include the system status bar and bottom navigation

     * bar.

     */

    private int getDisplayHeight() {

        final DisplayMetrics dm = mContext.getResources().getDisplayMetrics();

        return dm.heightPixels;

    }



    // The height of top tool bar (R.layout.section_header).

    private int getTopToolBarHeight() {

        final TypedValue typedValue = new TypedValue();

        return mContext.getTheme().resolveAttribute(

                android.R.attr.actionBarSize, typedValue, true)

                ? TypedValue.complexToDimensionPixelSize(

                        typedValue.data, mContext.getResources().getDisplayMetrics())

                : 0;

    }



    private int getFullPreviewCardHeight() {

        final Resources res = mContext.getResources();

        return getDisplayHeight()

                - getTopToolBarHeight()

                - res.getDimensionPixelSize(R.dimen.bottom_navbar_height)

                - res.getDimensionPixelSize(R.dimen.full_preview_page_default_padding_top)

                - res.getDimensionPixelSize(R.dimen.full_preview_page_default_padding_bottom);

    }

}