/**
* Set the width and height of the canvas.
*
* @param width
* @param height
*/
public void setDimensions(int width, int height) {
Utils.traceBeginSection("set dimensions");
if (mWidth == width && mHeight == height) {
Utils.traceEndSection();
return;
}
mWidth = width;
mHeight = height;
mDividedBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mDividedBitmap);
for (int i = 0; i < getDivisionCount(); i++) {
mDivisionImages.set(i, null);
}
mBitmapValid = false;
Utils.traceEndSection();
}
/**
* Get the desired dimensions and scale for the bitmap to be placed in the location corresponding
* to id. Caller must allocate the Dimensions object.
*
* @param key
* @param outDim a {@link ImageCanvas.Dimensions} object to write results into
*/
@Override
public void getDesiredDimensions(Object key, Dimensions outDim) {
Utils.traceBeginSection("get desired dimensions");
int w = 0, h = 0;
float scale = 0;
final Integer pos = mDivisionMap.get(transformKeyToDivisionId(key));
if (pos != null && pos >= 0) {
final int size = mDivisionMap.size();
switch (size) {
case 0:
break;
case 1:
w = mWidth;
h = mHeight;
scale = Dimensions.SCALE_ONE;
break;
case 2:
w = mWidth / 2;
h = mHeight;
scale = Dimensions.SCALE_HALF;
break;
case 3:
switch (pos) {
case 0:
w = mWidth / 2;
h = mHeight;
scale = Dimensions.SCALE_HALF;
break;
default:
w = mWidth / 2;
h = mHeight / 2;
scale = Dimensions.SCALE_QUARTER;
}
break;
case 4:
w = mWidth / 2;
h = mHeight / 2;
scale = Dimensions.SCALE_QUARTER;
break;
}
}
outDim.width = w;
outDim.height = h;
outDim.scale = scale;
Utils.traceEndSection();
}
private void addOrClearDivisionImage(Bitmap b, Object key) {
Utils.traceBeginSection("add or clear division image");
final Integer pos = mDivisionMap.get(transformKeyToDivisionId(key));
if (pos != null && pos >= 0) {
mDivisionImages.set(pos, b);
boolean complete = false;
final int width = mWidth;
final int height = mHeight;
// Different layouts depending on count.
final int size = mDivisionMap.size();
switch (size) {
case 0:
// Do nothing.
break;
case 1:
// Draw the bitmap filling the entire canvas.
draw(mDivisionImages.get(0), 0, 0, width, height);
complete = true;
break;
case 2:
// Draw 2 bitmaps split vertically down the middle
switch (pos) {
case 0:
draw(mDivisionImages.get(0), 0, 0, width / 2, height);
break;
case 1:
draw(mDivisionImages.get(1), width / 2, 0, width, height);
break;
}
complete =
mDivisionImages.get(0) != null && mDivisionImages.get(1) != null
|| isPartialBitmapComplete();
if (complete) {
// Draw dividers
drawVerticalDivider(width, height);
}
break;
case 3:
// Draw 3 bitmaps: the first takes up all vertical
// space, the 2nd and 3rd are stacked in the second vertical
// position.
switch (pos) {
case 0:
draw(mDivisionImages.get(0), 0, 0, width / 2, height);
break;
case 1:
draw(mDivisionImages.get(1), width / 2, 0, width, height / 2);
break;
case 2:
draw(mDivisionImages.get(2), width / 2, height / 2, width, height);
break;
}
complete =
mDivisionImages.get(0) != null
&& mDivisionImages.get(1) != null
&& mDivisionImages.get(2) != null
|| isPartialBitmapComplete();
if (complete) {
// Draw dividers
drawVerticalDivider(width, height);
drawHorizontalDivider(width / 2, height / 2, width, height / 2);
}
break;
default:
// Draw all 4 bitmaps in a grid
switch (pos) {
case 0:
draw(mDivisionImages.get(0), 0, 0, width / 2, height / 2);
break;
case 1:
draw(mDivisionImages.get(1), width / 2, 0, width, height / 2);
break;
case 2:
draw(mDivisionImages.get(2), 0, height / 2, width / 2, height);
break;
case 3:
draw(mDivisionImages.get(3), width / 2, height / 2, width, height);
break;
}
complete =
mDivisionImages.get(0) != null
&& mDivisionImages.get(1) != null
&& mDivisionImages.get(2) != null
&& mDivisionImages.get(3) != null
|| isPartialBitmapComplete();
if (complete) {
// Draw dividers
drawVerticalDivider(width, height);
drawHorizontalDivider(0, height / 2, width, height / 2);
}
break;
}
// Create the new image bitmap.
if (complete) {
mBitmapValid = true;
mCallback.invalidate();
}
}
Utils.traceEndSection();
}