From 21f987ab2584486d68e97029f2c932e88a35a1a6 Mon Sep 17 00:00:00 2001
From: Paul Gardiner <paulg.artifex@glidos.net>
Date: Mon, 4 Feb 2013 14:44:47 +0000
Subject: Android: add hooks for zooming in reflow mode

---
 .../src/com/artifex/mupdfdemo/MuPDFActivity.java   |  5 ++++
 .../src/com/artifex/mupdfdemo/MuPDFPageView.java   |  5 ++++
 .../src/com/artifex/mupdfdemo/MuPDFReflowView.java |  3 ++
 android/src/com/artifex/mupdfdemo/MuPDFView.java   |  1 +
 android/src/com/artifex/mupdfdemo/ReaderView.java  | 33 +++++++++++++++-------
 5 files changed, 37 insertions(+), 10 deletions(-)

(limited to 'android/src/com/artifex/mupdfdemo')

diff --git a/android/src/com/artifex/mupdfdemo/MuPDFActivity.java b/android/src/com/artifex/mupdfdemo/MuPDFActivity.java
index f627cc0f..3617f9f2 100644
--- a/android/src/com/artifex/mupdfdemo/MuPDFActivity.java
+++ b/android/src/com/artifex/mupdfdemo/MuPDFActivity.java
@@ -561,6 +561,11 @@ public class MuPDFActivity extends Activity
 			protected void onNotInUse(View v) {
 				((MuPDFView)v).releaseResources();
 			}
+
+			@Override
+			protected void onScaleChild(View v, Float scale) {
+				((MuPDFView)v).setScale(scale);
+			}
 		};
 		mDocView.setAdapter(new MuPDFPageAdapter(this, core));
 
diff --git a/android/src/com/artifex/mupdfdemo/MuPDFPageView.java b/android/src/com/artifex/mupdfdemo/MuPDFPageView.java
index 9dcae615..cf5e1af5 100644
--- a/android/src/com/artifex/mupdfdemo/MuPDFPageView.java
+++ b/android/src/com/artifex/mupdfdemo/MuPDFPageView.java
@@ -245,4 +245,9 @@ public class MuPDFPageView extends PageView implements MuPDFView {
 
 		super.setPage(page, size);
 	}
+
+	public void setScale(float scale) {
+		// This type of view scales automatically to fit the size
+		// determined by the parent view groups during layout
+	}
 }
diff --git a/android/src/com/artifex/mupdfdemo/MuPDFReflowView.java b/android/src/com/artifex/mupdfdemo/MuPDFReflowView.java
index 8a26c8e6..e5992e46 100644
--- a/android/src/com/artifex/mupdfdemo/MuPDFReflowView.java
+++ b/android/src/com/artifex/mupdfdemo/MuPDFReflowView.java
@@ -66,6 +66,9 @@ public class MuPDFReflowView extends WebView implements MuPDFView {
 		return mPage;
 	}
 
+	public void setScale(float scale) {
+	}
+
 	public void blank(int page) {
 	}
 
diff --git a/android/src/com/artifex/mupdfdemo/MuPDFView.java b/android/src/com/artifex/mupdfdemo/MuPDFView.java
index 4be7f271..919ac516 100644
--- a/android/src/com/artifex/mupdfdemo/MuPDFView.java
+++ b/android/src/com/artifex/mupdfdemo/MuPDFView.java
@@ -6,6 +6,7 @@ import android.graphics.RectF;
 
 public interface MuPDFView {
 	public void setPage(int page, PointF size);
+	public void setScale(float scale);
 	public int getPage();
 	public void blank(int page);
 	public boolean passClickEvent(float x, float y);
diff --git a/android/src/com/artifex/mupdfdemo/ReaderView.java b/android/src/com/artifex/mupdfdemo/ReaderView.java
index 78eef71c..f16b39b3 100644
--- a/android/src/com/artifex/mupdfdemo/ReaderView.java
+++ b/android/src/com/artifex/mupdfdemo/ReaderView.java
@@ -315,6 +315,8 @@ public class ReaderView extends AdapterView<Adapter>
 
 	protected void onNotInUse(View v) {};
 
+	protected void onScaleChild(View v, Float scale) {};
+
 	public View getDisplayedView() {
 		return mChildViews.get(mCurrent);
 	}
@@ -423,17 +425,27 @@ public class ReaderView extends AdapterView<Adapter>
 	public boolean onScale(ScaleGestureDetector detector) {
 		float previousScale = mScale;
 		mScale = Math.min(Math.max(mScale * detector.getScaleFactor(), MIN_SCALE), MAX_SCALE);
-		float factor = mScale/previousScale;
 
-		View v = mChildViews.get(mCurrent);
-		if (v != null) {
-			// Work out the focus point relative to the view top left
-			int viewFocusX = (int)detector.getFocusX() - (v.getLeft() + mXScroll);
-			int viewFocusY = (int)detector.getFocusY() - (v.getTop() + mYScroll);
-			// Scroll to maintain the focus point
-			mXScroll += viewFocusX - viewFocusX * factor;
-			mYScroll += viewFocusY - viewFocusY * factor;
-			requestLayout();
+		if (mReflow) {
+			applyToChildren(new ViewMapper() {
+				@Override
+				void applyToView(View view) {
+					onScaleChild(view, mScale);
+				}
+			});
+		} else {
+			float factor = mScale/previousScale;
+
+			View v = mChildViews.get(mCurrent);
+			if (v != null) {
+				// Work out the focus point relative to the view top left
+				int viewFocusX = (int)detector.getFocusX() - (v.getLeft() + mXScroll);
+				int viewFocusY = (int)detector.getFocusY() - (v.getTop() + mYScroll);
+				// Scroll to maintain the focus point
+				mXScroll += viewFocusX - viewFocusX * factor;
+				mYScroll += viewFocusY - viewFocusY * factor;
+				requestLayout();
+			}
 		}
 		return true;
 	}
@@ -664,6 +676,7 @@ public class ReaderView extends AdapterView<Adapter>
 			addAndMeasureChild(i, v);
 		}
 		onChildSetup(i, v);
+		onScaleChild(v, mScale);
 
 		return v;
 	}
-- 
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