Home | History | Annotate | Download | only in layout 
      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Eclipse Public License, Version 1.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.eclipse.org/org/documents/epl-v10.php
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.ide.common.layout;
     18 
     19 import static com.android.ide.common.layout.LayoutConstants.VALUE_N_DP;
     20 import static com.android.ide.common.layout.LayoutConstants.VALUE_WRAP_CONTENT;
     21 
     22 import com.android.ide.common.api.INode;
     23 import com.android.ide.common.api.Rect;
     24 import com.android.ide.common.api.Segment;
     25 import com.android.ide.common.api.SegmentType;
     26 
     27 /** State held during resizing operations */
     28 class ResizeState {
     29     /**
     30      * The associated rule
     31      */
     32     private final BaseLayoutRule mRule;
     33 
     34     /**
     35      * The node being resized
     36      */
     37     public final INode node;
     38 
     39      /**
     40       * The layout containing the resized node
     41       */
     42     public final INode layout;
     43 
     44     /** The proposed resized bounds of the node */
     45     public Rect bounds;
     46 
     47     /** The preferred wrap_content bounds of the node */
     48     public Rect wrapBounds;
     49 
     50     /** The suggested horizontal fill_parent guideline position */
     51     public Segment horizontalFillSegment;
     52 
     53     /** The suggested vertical fill_parent guideline position */
     54     public Segment verticalFillSegment;
     55 
     56     /** The type of horizontal edge being resized, or null */
     57     public SegmentType horizontalEdgeType;
     58 
     59     /** The type of vertical edge being resized, or null */
     60     public SegmentType verticalEdgeType;
     61 
     62     /** Whether the user has snapped to the wrap_content width */
     63     public boolean wrapWidth;
     64 
     65     /** Whether the user has snapped to the wrap_content height */
     66     public boolean wrapHeight;
     67 
     68     /** Whether the user has snapped to the match_parent width */
     69     public boolean fillWidth;
     70 
     71     /** Whether the user has snapped to the match_parent height */
     72     public boolean fillHeight;
     73 
     74     /** Custom field for use by subclasses */
     75     public Object clientData;
     76 
     77     /** Keyboard mask */
     78     public int modifierMask;
     79 
     80     /**
     81      * The actual view object for the layout containing the resizing operation,
     82      * or null if not known
     83      */
     84     public Object layoutView;
     85 
     86     /**
     87      * Constructs a new {@link ResizeState}
     88      *
     89      * @param rule the associated rule
     90      * @param layout the parent layout containing the resized node
     91      * @param layoutView the actual View instance for the layout, or null if not known
     92      * @param node the node being resized
     93      */
     94     ResizeState(BaseLayoutRule rule, INode layout, Object layoutView, INode node) {
     95         mRule = rule;
     96 
     97         this.layout = layout;
     98         this.node = node;
     99         this.layoutView = layoutView;
    100     }
    101 
    102     /**
    103      * Returns the width attribute to be set to match the new bounds
    104      *
    105      * @return the width string, never null
    106      */
    107     public String getWidthAttribute() {
    108         if (wrapWidth) {
    109             return VALUE_WRAP_CONTENT;
    110         } else if (fillWidth) {
    111             return mRule.getFillParentValueName();
    112         } else {
    113             return String.format(VALUE_N_DP, mRule.mRulesEngine.pxToDp(bounds.w));
    114         }
    115     }
    116 
    117     /**
    118      * Returns the height attribute to be set to match the new bounds
    119      *
    120      * @return the height string, never null
    121      */
    122     public String getHeightAttribute() {
    123         if (wrapHeight) {
    124             return VALUE_WRAP_CONTENT;
    125         } else if (fillHeight) {
    126             return mRule.getFillParentValueName();
    127         } else {
    128             return String.format(VALUE_N_DP, mRule.mRulesEngine.pxToDp(bounds.h));
    129         }
    130     }
    131 }