/**
* Simple constructor to use when creating a view from code.
*
* @param context The Context the view is running in, through which it can access the current
* theme, resources, etc.
*/
protected BaseChart(Context context) {
super(context);
mLegendHeight = Utils.dpToPx(DEF_LEGEND_HEIGHT);
mLegendTextSize = Utils.dpToPx(DEF_LEGEND_TEXT_SIZE);
mAnimationTime = DEF_ANIMATION_TIME;
}
/**
* Constructor that is called when inflating a view from XML. This is called when a view is being
* constructed from an XML file, supplying attributes that were specified in the XML file. This
* version uses a default style of 0, so the only attribute values applied are those in the
* Context's Theme and the given AttributeSet.
*
* <p>
*
* <p>The method onFinishInflate() will be called after all children have been added.
*
* @param context The Context the view is running in, through which it can access the current
* theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
* @see #View(android.content.Context, android.util.AttributeSet, int)
*/
public BaseChart(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.BaseChart, 0, 0);
try {
mLegendHeight =
a.getDimension(R.styleable.BaseChart_egLegendHeight, Utils.dpToPx(DEF_LEGEND_HEIGHT));
mLegendTextSize =
a.getDimension(
R.styleable.BaseChart_egLegendTextSize, Utils.dpToPx(DEF_LEGEND_TEXT_SIZE));
mAnimationTime = a.getInt(R.styleable.BaseChart_egAnimationTime, DEF_ANIMATION_TIME);
} finally {
// release the TypedArray so that it can be reused.
a.recycle();
}
}
/**
* Sets and updates the height of the legend view.
*
* @param _legendHeight The new legend view height.
*/
public void setLegendHeight(float _legendHeight) {
mLegendHeight = Utils.dpToPx(_legendHeight);
if (getData().size() > 0) onDataChanged();
}
/**
* This is the main chart class and should be inherited by every graph. This class provides some
* general methods and variables, which are needed and used by every type of chart.
*/
public abstract class BaseChart extends ViewGroup {
/**
* Simple constructor to use when creating a view from code.
*
* @param context The Context the view is running in, through which it can access the current
* theme, resources, etc.
*/
protected BaseChart(Context context) {
super(context);
mLegendHeight = Utils.dpToPx(DEF_LEGEND_HEIGHT);
mLegendTextSize = Utils.dpToPx(DEF_LEGEND_TEXT_SIZE);
mAnimationTime = DEF_ANIMATION_TIME;
}
/**
* Constructor that is called when inflating a view from XML. This is called when a view is being
* constructed from an XML file, supplying attributes that were specified in the XML file. This
* version uses a default style of 0, so the only attribute values applied are those in the
* Context's Theme and the given AttributeSet.
*
* <p>
*
* <p>The method onFinishInflate() will be called after all children have been added.
*
* @param context The Context the view is running in, through which it can access the current
* theme, resources, etc.
* @param attrs The attributes of the XML tag that is inflating the view.
* @see #View(android.content.Context, android.util.AttributeSet, int)
*/
public BaseChart(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.BaseChart, 0, 0);
try {
mLegendHeight =
a.getDimension(R.styleable.BaseChart_egLegendHeight, Utils.dpToPx(DEF_LEGEND_HEIGHT));
mLegendTextSize =
a.getDimension(
R.styleable.BaseChart_egLegendTextSize, Utils.dpToPx(DEF_LEGEND_TEXT_SIZE));
mAnimationTime = a.getInt(R.styleable.BaseChart_egAnimationTime, DEF_ANIMATION_TIME);
} finally {
// release the TypedArray so that it can be reused.
a.recycle();
}
}
/**
* Returns the current height of the legend view
*
* @return Legend view height
*/
public float getLegendHeight() {
return mLegendHeight;
}
/**
* Sets and updates the height of the legend view.
*
* @param _legendHeight The new legend view height.
*/
public void setLegendHeight(float _legendHeight) {
mLegendHeight = Utils.dpToPx(_legendHeight);
if (getData().size() > 0) onDataChanged();
}
/**
* Returns the text size which is used by the legend.
*
* @return Size of the legend text.
*/
public float getLegendTextSize() {
return mLegendTextSize;
}
/**
* Sets the size of the text which is displayed in the legend. (Interpreted as sp value)
*
* @param _legendTextSize Size of the legend text.
*/
public void setLegendTextSize(float _legendTextSize) {
mLegendTextSize = Utils.dpToPx(_legendTextSize);
}
/**
* Returns the animation time in milliseconds.
*
* @return Animation time.
*/
public int getAnimationTime() {
return mAnimationTime;
}
/**
* Sets the animation time in milliseconds.
*
* @param _animationTime Animation time in milliseconds.
*/
public void setAnimationTime(int _animationTime) {
mAnimationTime = _animationTime;
}
/**
* This is called during layout when the size of this view has changed. If you were just added to
* the view hierarchy, you're called with the old values of 0.
*
* @param w Current width of this view.
* @param h Current height of this view.
* @param oldw Old width of this view.
* @param oldh Old height of this view.
*/
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mLeftPadding = getPaddingLeft();
mTopPadding = getPaddingTop();
mRightPadding = getPaddingRight();
mBottomPadding = getPaddingBottom();
}
/** Starts the chart animation. */
public void startAnimation() {
if (mRevealAnimator != null) {
mStartedAnimation = true;
mRevealAnimator.setDuration(mAnimationTime).start();
}
}
/**
* This is the main entry point after the graph has been inflated. Used to initialize the graph
* and its corresponding members.
*/
protected abstract void initializeGraph();
/**
* Should be called after new data is inserted. Will be automatically called, when the view
* dimensions has changed.
*/
protected void onDataChanged() {
invalidate();
}
/**
* Returns the datasets which are currently inserted.
*
* @return the datasets
*/
public abstract List<? extends BaseModel> getData();
/** Resets and clears the data object. */
public abstract void clearChart();
/**
* Should be called when the dataset changed and the graph should update and redraw. Graph
* implementations might overwrite this method to do more work than just call onDataChanged()
*/
public void update() {
onDataChanged();
}
// ##############################################################################################
// Variables
// ##############################################################################################
protected static final NumberFormat mFormatter = NumberFormat.getInstance(Locale.getDefault());
public static final float DEF_LEGEND_HEIGHT = 58.f;
public static final int DEF_LEGEND_COLOR = 0xFF898989;
// will be interpreted as sp value
public static final float DEF_LEGEND_TEXT_SIZE = 12.f;
public static final int DEF_ANIMATION_TIME = 2000;
protected int mHeight;
protected int mWidth;
protected int mGraphWidth;
protected int mGraphHeight;
protected float mLegendWidth;
protected float mLegendHeight;
protected float mLegendTextSize;
protected int mLeftPadding;
protected int mTopPadding;
protected int mRightPadding;
protected int mBottomPadding;
protected float mMaxFontHeight;
protected float mLegendTopPadding = Utils.dpToPx(4.f);
protected ValueAnimator mRevealAnimator = null;
protected float mRevealValue = 1.0f;
protected int mAnimationTime = 1000;
protected boolean mStartedAnimation = false;
}
/**
* Sets the size of the text which is displayed in the legend. (Interpreted as sp value)
*
* @param _legendTextSize Size of the legend text.
*/
public void setLegendTextSize(float _legendTextSize) {
mLegendTextSize = Utils.dpToPx(_legendTextSize);
}