Adding drag target bar.

Change-Id: Ia00ed30264ea5f1d3c919111d15588ef441bfe20

1 files changed, 164 insertions, 0 deletions

diff --git a/src/com/android/launcher2/DeleteDropTarget.java b/src/com/android/launcher2/DeleteDropTarget.java
new file mode 100644
index 000000000..5c67793ac
--- /dev/null
+++ b/src/com/android/launcher2/DeleteDropTarget.java
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher2;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffColorFilter;
+import android.graphics.drawable.TransitionDrawable;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.android.launcher.R;
+
+public class DeleteDropTarget extends IconDropTarget {
+
+    private static final int sTransitionDuration = 0;
+
+    private TransitionDrawable mIcon;
+    private int mDefaultTextColor;
+    private int mHoverColor = 0xFFFF0000;
+
+    public DeleteDropTarget(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public DeleteDropTarget(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+
+        // Get the drawable
+        mIcon = (TransitionDrawable) getCompoundDrawables()[0];
+
+        // Get the hover color
+        Resources r = getResources();
+        mDefaultTextColor = getTextColors().getDefaultColor();
+        mHoverColor = r.getColor(R.color.delete_target_hover_tint);
+        mHoverPaint.setColorFilter(new PorterDuffColorFilter(
+                mHoverColor, PorterDuff.Mode.SRC_ATOP));
+    }
+
+    private boolean isAllAppsApplication(DragSource source, Object info) {
+        return (source instanceof AppsCustomizePagedView) && (info instanceof ApplicationInfo);
+    }
+    private boolean isAllAppsWidget(DragSource source, Object info) {
+        return (source instanceof AppsCustomizePagedView) && (info instanceof PendingAddWidgetInfo);
+    }
+    private boolean isWorkspaceApplication(DragObject d) {
+        return (d.dragSource instanceof Workspace) && (d.dragInfo instanceof ShortcutInfo);
+    }
+    private boolean isWorkspaceWidget(DragObject d) {
+        return (d.dragSource instanceof Workspace) && (d.dragInfo instanceof LauncherAppWidgetInfo);
+    }
+    private boolean isWorkspaceFolder(DragObject d) {
+        return (d.dragSource instanceof Workspace) && (d.dragInfo instanceof FolderInfo);
+    }
+
+    @Override
+    public boolean acceptDrop(DragObject d) {
+        // We can remove everything including App shortcuts, folders, widgets, etc.
+        return true;
+    }
+
+    @Override
+    public void onDragStart(DragSource source, Object info, int dragAction) {
+        ItemInfo item = (ItemInfo) info;
+        boolean isVisible = true;
+        boolean isUninstall = false;
+
+        // If we are dragging a widget from AppsCustomize , hide the delete target
+        if (isAllAppsWidget(source, info)) {
+            isVisible = false;
+        }
+
+        // If we are dragging an application from AppsCustomize, only show the control if we can
+        // delete the app (it was downloaded), and rename the string to "uninstall" in such a case
+        if (isAllAppsApplication(source, info)) {
+            ApplicationInfo appInfo = (ApplicationInfo) info;
+            if ((appInfo.flags & ApplicationInfo.DOWNLOADED_FLAG) != 0) {
+                isUninstall = true;
+            } else {
+                isVisible = false;
+            }
+        }
+
+        mActive = isVisible;
+        ((ViewGroup) getParent()).setVisibility(isVisible ? View.VISIBLE : View.GONE);
+        if (getText().length() > 0) {
+            setText(isUninstall ? R.string.delete_target_uninstall_label
+                : R.string.delete_target_label);
+        }
+    }
+
+    @Override
+    public void onDragEnd() {
+        super.onDragEnd();
+        mActive = false;
+    }
+
+    public void onDragEnter(DragObject d) {
+        super.onDragEnter(d);
+
+        mIcon.startTransition(sTransitionDuration);
+        setTextColor(mHoverColor);
+    }
+
+    public void onDragExit(DragObject d) {
+        super.onDragExit(d);
+
+        mIcon.reverseTransition(sTransitionDuration);
+        setTextColor(mDefaultTextColor);
+    }
+
+    public void onDrop(DragObject d) {
+        ItemInfo item = (ItemInfo) d.dragInfo;
+
+        if (isAllAppsApplication(d.dragSource, item)) {
+            // Uninstall the application if it is being dragged from AppsCustomize
+            mLauncher.startApplicationUninstallActivity((ApplicationInfo) item);
+        } else if (isWorkspaceApplication(d)) {
+            LauncherModel.deleteItemFromDatabase(mLauncher, item);
+        } else if (isWorkspaceFolder(d)) {
+            // Remove the folder from the workspace and delete the contents from launcher model
+            FolderInfo folderInfo = (FolderInfo) item;
+            mLauncher.removeFolder(folderInfo);
+            LauncherModel.deleteFolderContentsFromDatabase(mLauncher, folderInfo);
+        } else if (isWorkspaceWidget(d)) {
+            // Remove the widget from the workspace
+            mLauncher.removeAppWidget((LauncherAppWidgetInfo) item);
+            LauncherModel.deleteItemFromDatabase(mLauncher, item);
+
+            final LauncherAppWidgetInfo launcherAppWidgetInfo = (LauncherAppWidgetInfo) item;
+            final LauncherAppWidgetHost appWidgetHost = mLauncher.getAppWidgetHost();
+            if (appWidgetHost != null) {
+                // Deleting an app widget ID is a void call but writes to disk before returning
+                // to the caller...
+                new Thread("deleteAppWidgetId") {
+                    public void run() {
+                        appWidgetHost.deleteAppWidgetId(launcherAppWidgetInfo.appWidgetId);
+                    }
+                }.start();
+            }
+        }
+    }
+}