public LegendRenderer(ViewPortHandler viewPortHandler, Legend legend) {
super(viewPortHandler);
this.mLegend = legend;
mLegendLabelPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mLegendLabelPaint.setTextSize(Utils.convertDpToPixel(9f));
mLegendLabelPaint.setTextAlign(Align.LEFT);
mLegendFormPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mLegendFormPaint.setStyle(Paint.Style.FILL);
mLegendFormPaint.setStrokeWidth(3f);
legend.setEnabled(false);
}
public void renderLegend(Canvas c) {
if (!mLegend.isEnabled()) return;
Typeface tf = mLegend.getTypeface();
if (tf != null) mLegendLabelPaint.setTypeface(tf);
mLegendLabelPaint.setTextSize(mLegend.getTextSize());
mLegendLabelPaint.setColor(mLegend.getTextColor());
float labelLineHeight = Utils.getLineHeight(mLegendLabelPaint);
float labelLineSpacing = Utils.getLineSpacing(mLegendLabelPaint) + mLegend.getYEntrySpace();
float formYOffset = labelLineHeight - Utils.calcTextHeight(mLegendLabelPaint, "ABC") / 2.f;
String[] labels = mLegend.getLabels();
int[] colors = mLegend.getColors();
float formToTextSpace = mLegend.getFormToTextSpace();
float xEntrySpace = mLegend.getXEntrySpace();
Legend.LegendDirection direction = mLegend.getDirection();
float formSize = mLegend.getFormSize();
// space between the entries
float stackSpace = mLegend.getStackSpace();
float posX, posY;
float yoffset = mLegend.getYOffset();
float xoffset = mLegend.getXOffset();
Legend.LegendPosition legendPosition = mLegend.getPosition();
switch (legendPosition) {
case BELOW_CHART_LEFT:
case BELOW_CHART_RIGHT:
case BELOW_CHART_CENTER:
{
float contentWidth = mViewPortHandler.contentWidth();
float originPosX;
if (legendPosition == Legend.LegendPosition.BELOW_CHART_LEFT) {
originPosX = mViewPortHandler.contentLeft() + xoffset;
if (direction == Legend.LegendDirection.RIGHT_TO_LEFT)
originPosX += mLegend.mNeededWidth;
} else if (legendPosition == Legend.LegendPosition.BELOW_CHART_RIGHT) {
originPosX = mViewPortHandler.contentRight() - xoffset;
if (direction == Legend.LegendDirection.LEFT_TO_RIGHT)
originPosX -= mLegend.mNeededWidth;
} else // if (legendPosition == Legend.LegendPosition.BELOW_CHART_CENTER)
originPosX = mViewPortHandler.contentLeft() + contentWidth / 2.f;
FSize[] calculatedLineSizes = mLegend.getCalculatedLineSizes();
FSize[] calculatedLabelSizes = mLegend.getCalculatedLabelSizes();
Boolean[] calculatedLabelBreakPoints = mLegend.getCalculatedLabelBreakPoints();
posX = originPosX;
posY = mViewPortHandler.getChartHeight() - yoffset - mLegend.mNeededHeight;
int lineIndex = 0;
for (int i = 0, count = labels.length; i < count; i++) {
if (calculatedLabelBreakPoints[i]) {
posX = originPosX;
posY += labelLineHeight + labelLineSpacing;
}
if (posX == originPosX && legendPosition == Legend.LegendPosition.BELOW_CHART_CENTER) {
posX +=
(direction == Legend.LegendDirection.RIGHT_TO_LEFT
? calculatedLineSizes[lineIndex].width
: -calculatedLineSizes[lineIndex].width)
/ 2.f;
lineIndex++;
}
boolean drawingForm = colors[i] != ColorTemplate.COLOR_SKIP;
boolean isStacked = labels[i] == null; // grouped forms have null labels
if (drawingForm) {
if (direction == Legend.LegendDirection.RIGHT_TO_LEFT) posX -= formSize;
drawForm(c, posX, posY + formYOffset, i, mLegend);
if (direction == Legend.LegendDirection.LEFT_TO_RIGHT) posX += formSize;
}
if (!isStacked) {
if (drawingForm)
posX +=
direction == Legend.LegendDirection.RIGHT_TO_LEFT
? -formToTextSpace
: formToTextSpace;
if (direction == Legend.LegendDirection.RIGHT_TO_LEFT)
posX -= calculatedLabelSizes[i].width;
drawLabel(c, posX, posY + labelLineHeight, labels[i]);
if (direction == Legend.LegendDirection.LEFT_TO_RIGHT)
posX += calculatedLabelSizes[i].width;
posX +=
direction == Legend.LegendDirection.RIGHT_TO_LEFT ? -xEntrySpace : xEntrySpace;
} else
posX += direction == Legend.LegendDirection.RIGHT_TO_LEFT ? -stackSpace : stackSpace;
}
}
break;
case PIECHART_CENTER:
case RIGHT_OF_CHART:
case RIGHT_OF_CHART_CENTER:
case RIGHT_OF_CHART_INSIDE:
case LEFT_OF_CHART:
case LEFT_OF_CHART_CENTER:
case LEFT_OF_CHART_INSIDE:
{
// contains the stacked legend size in pixels
float stack = 0f;
boolean wasStacked = false;
if (legendPosition == Legend.LegendPosition.PIECHART_CENTER) {
posX =
mViewPortHandler.getChartWidth() / 2f
+ (direction == Legend.LegendDirection.LEFT_TO_RIGHT
? -mLegend.mTextWidthMax / 2f
: mLegend.mTextWidthMax / 2f);
posY =
mViewPortHandler.getChartHeight() / 2f
- mLegend.mNeededHeight / 2f
+ mLegend.getYOffset();
} else {
boolean isRightAligned =
legendPosition == Legend.LegendPosition.RIGHT_OF_CHART
|| legendPosition == Legend.LegendPosition.RIGHT_OF_CHART_CENTER
|| legendPosition == Legend.LegendPosition.RIGHT_OF_CHART_INSIDE;
if (isRightAligned) {
posX = mViewPortHandler.getChartWidth() - xoffset;
if (direction == Legend.LegendDirection.LEFT_TO_RIGHT) posX -= mLegend.mTextWidthMax;
} else {
posX = xoffset;
if (direction == Legend.LegendDirection.RIGHT_TO_LEFT) posX += mLegend.mTextWidthMax;
}
if (legendPosition == Legend.LegendPosition.RIGHT_OF_CHART
|| legendPosition == Legend.LegendPosition.LEFT_OF_CHART) {
posY = mViewPortHandler.contentTop() + yoffset;
} else if (legendPosition == Legend.LegendPosition.RIGHT_OF_CHART_CENTER
|| legendPosition == Legend.LegendPosition.LEFT_OF_CHART_CENTER) {
posY = mViewPortHandler.getChartHeight() / 2f - mLegend.mNeededHeight / 2f;
} else /*
* if (legendPosition ==
* Legend.LegendPosition.RIGHT_OF_CHART_INSIDE ||
* legendPosition ==
* Legend.LegendPosition.LEFT_OF_CHART_INSIDE)
*/ {
posY = mViewPortHandler.contentTop() + yoffset;
}
}
for (int i = 0; i < labels.length; i++) {
Boolean drawingForm = colors[i] != ColorTemplate.COLOR_SKIP;
float x = posX;
if (drawingForm) {
if (direction == Legend.LegendDirection.LEFT_TO_RIGHT) x += stack;
else x -= formSize - stack;
drawForm(c, x, posY + formYOffset, i, mLegend);
if (direction == Legend.LegendDirection.LEFT_TO_RIGHT) x += formSize;
}
if (labels[i] != null) {
if (drawingForm && !wasStacked)
x +=
direction == Legend.LegendDirection.LEFT_TO_RIGHT
? formToTextSpace
: -formToTextSpace;
else if (wasStacked) x = posX;
if (direction == Legend.LegendDirection.RIGHT_TO_LEFT)
x -= Utils.calcTextWidth(mLegendLabelPaint, labels[i]);
if (!wasStacked) {
drawLabel(c, x, posY + labelLineHeight, labels[i]);
} else {
posY += labelLineHeight + labelLineSpacing;
drawLabel(c, x, posY + labelLineHeight, labels[i]);
}
// make a step down
posY += labelLineHeight + labelLineSpacing;
stack = 0f;
} else {
stack += formSize + stackSpace;
wasStacked = true;
}
}
}
break;
}
}