/**
* Calculates the dimensions of the Legend. This includes the maximum width and height of a single
* entry, as well as the total width and height of the Legend.
*
* @param labelpaint
*/
public void calculateDimensions(Paint labelpaint, ViewPortHandler viewPortHandler) {
mTextWidthMax = getMaximumEntryWidth(labelpaint);
mTextHeightMax = getMaximumEntryHeight(labelpaint);
switch (mOrientation) {
case VERTICAL:
{
float maxWidth = 0f, maxHeight = 0f, width = 0f;
float labelLineHeight = Utils.getLineHeight(labelpaint);
final int count = mLabels.length;
boolean wasStacked = false;
for (int i = 0; i < count; i++) {
boolean drawingForm = mColors[i] != ColorTemplate.COLOR_SKIP;
if (!wasStacked) width = 0.f;
if (drawingForm) {
if (wasStacked) width += mStackSpace;
width += mFormSize;
}
// grouped forms have null labels
if (mLabels[i] != null) {
// make a step to the left
if (drawingForm && !wasStacked) width += mFormToTextSpace;
else if (wasStacked) {
maxWidth = Math.max(maxWidth, width);
maxHeight += labelLineHeight + mYEntrySpace;
width = 0.f;
wasStacked = false;
}
width += Utils.calcTextWidth(labelpaint, mLabels[i]);
if (i < count - 1) maxHeight += labelLineHeight + mYEntrySpace;
} else {
wasStacked = true;
width += mFormSize;
if (i < count - 1) width += mStackSpace;
}
maxWidth = Math.max(maxWidth, width);
}
mNeededWidth = maxWidth;
mNeededHeight = maxHeight;
break;
}
case HORIZONTAL:
{
int labelCount = mLabels.length;
float labelLineHeight = Utils.getLineHeight(labelpaint);
float labelLineSpacing = Utils.getLineSpacing(labelpaint) + mYEntrySpace;
float contentWidth = viewPortHandler.contentWidth() * mMaxSizePercent;
// Start calculating layout
float maxLineWidth = 0.f;
float currentLineWidth = 0.f;
float requiredWidth = 0.f;
int stackedStartIndex = -1;
mCalculatedLabelBreakPoints.clear();
mCalculatedLabelSizes.clear();
mCalculatedLineSizes.clear();
for (int i = 0; i < labelCount; i++) {
boolean drawingForm = mColors[i] != ColorTemplate.COLOR_SKIP;
mCalculatedLabelBreakPoints.add(false);
if (stackedStartIndex == -1) {
// we are not stacking, so required width is for this label
// only
requiredWidth = 0.f;
} else {
// add the spacing appropriate for stacked labels/forms
requiredWidth += mStackSpace;
}
// grouped forms have null labels
if (mLabels[i] != null) {
mCalculatedLabelSizes.add(Utils.calcTextSize(labelpaint, mLabels[i]));
requiredWidth += drawingForm ? mFormToTextSpace + mFormSize : 0.f;
requiredWidth += mCalculatedLabelSizes.get(i).width;
} else {
mCalculatedLabelSizes.add(FSize.getInstance(0.f, 0.f));
requiredWidth += drawingForm ? mFormSize : 0.f;
if (stackedStartIndex == -1) {
// mark this index as we might want to break here later
stackedStartIndex = i;
}
}
if (mLabels[i] != null || i == labelCount - 1) {
float requiredSpacing = currentLineWidth == 0.f ? 0.f : mXEntrySpace;
if (!mWordWrapEnabled // No word wrapping, it must fit.
// The line is empty, it must fit
|| currentLineWidth == 0.f
// It simply fits
|| (contentWidth - currentLineWidth >= requiredSpacing + requiredWidth)) {
// Expand current line
currentLineWidth += requiredSpacing + requiredWidth;
} else { // It doesn't fit, we need to wrap a line
// Add current line size to array
mCalculatedLineSizes.add(FSize.getInstance(currentLineWidth, labelLineHeight));
maxLineWidth = Math.max(maxLineWidth, currentLineWidth);
// Start a new line
mCalculatedLabelBreakPoints.set(
stackedStartIndex > -1 ? stackedStartIndex : i, true);
currentLineWidth = requiredWidth;
}
if (i == labelCount - 1) {
// Add last line size to array
mCalculatedLineSizes.add(FSize.getInstance(currentLineWidth, labelLineHeight));
maxLineWidth = Math.max(maxLineWidth, currentLineWidth);
}
}
stackedStartIndex = mLabels[i] != null ? -1 : stackedStartIndex;
}
mNeededWidth = maxLineWidth;
mNeededHeight =
labelLineHeight * (float) (mCalculatedLineSizes.size())
+ labelLineSpacing
* (float)
(mCalculatedLineSizes.size() == 0
? 0
: (mCalculatedLineSizes.size() - 1));
break;
}
}
mNeededHeight += mYOffset;
mNeededWidth += mXOffset;
}
