/*
Copyright 2016 Tomer Goldstein
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package com.tomergoldst.tooltips;
import android.graphics.Point;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
/**
* Created by Tomer on 01/07/2016.
*/
class ToolTipCoordinatesFinder {
/**
* return the top left coordinates for positioning the tip
*
* @param tipView - the newly created tip view
* @param tooltip - tool tip object
* @return point
*/
static Point getCoordinates(final TextView tipView, ToolTip tooltip) {
Point point = new Point();
final Coordinates anchorViewCoordinates = new Coordinates(tooltip.getAnchorView());
final Coordinates rootCoordinates = new Coordinates(tooltip.getRootView());
tipView.measure(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
switch (tooltip.getPosition()) {
case ToolTip.POSITION_ABOVE:
point = getPositionAbove(tipView, tooltip,
anchorViewCoordinates, rootCoordinates);
break;
case ToolTip.POSITION_BELOW:
point = getPositionBelow(tipView, tooltip,
anchorViewCoordinates, rootCoordinates);
break;
case ToolTip.POSITION_LEFT_TO:
point = getPositionLeftTo(tipView, tooltip,
anchorViewCoordinates, rootCoordinates);
break;
case ToolTip.POSITION_RIGHT_TO:
point = getPositionRightTo(tipView, tooltip,
anchorViewCoordinates, rootCoordinates);
break;
}
// add user defined offset values
point.x += UiUtils.isRtl() ? -tooltip.getOffsetX() : tooltip.getOffsetX();
point.y += tooltip.getOffsetY();
// coordinates retrieved are relative to 0,0 of the root layout
// added view to root is subject to root padding
// we need to subtract the top and left padding of root from coordinates. to adjust
// top left tip coordinates
point.x -= tooltip.getRootView().getPaddingLeft();
point.y -= tooltip.getRootView().getPaddingTop();
return point;
}
private static Point getPositionRightTo(TextView tipView, ToolTip toolTip, Coordinates anchorViewCoordinates, Coordinates rootLocation) {
Point point = new Point();
point.x = anchorViewCoordinates.right;
AdjustRightToOutOfBounds(tipView, toolTip.getRootView(), point, anchorViewCoordinates, rootLocation);
point.y = anchorViewCoordinates.top + getYCenteringOffset(tipView, toolTip);
return point;
}
private static Point getPositionLeftTo(TextView tipView, ToolTip toolTip, Coordinates anchorViewCoordinates, Coordinates rootLocation) {
Point point = new Point();
point.x = anchorViewCoordinates.left - tipView.getMeasuredWidth();
AdjustLeftToOutOfBounds(tipView, toolTip.getRootView(), point, anchorViewCoordinates, rootLocation);
point.y = anchorViewCoordinates.top + getYCenteringOffset(tipView, toolTip);
return point;
}
private static Point getPositionBelow(TextView tipView, ToolTip toolTip, Coordinates anchorViewCoordinates, Coordinates rootLocation) {
Point point = new Point();
point.x = anchorViewCoordinates.left + getXOffset(tipView, toolTip);
if (toolTip.alignedCenter()) {
AdjustHorizontalCenteredOutOfBounds(tipView, toolTip.getRootView(), point, rootLocation);
} else if (toolTip.alignedLeft()){
AdjustHorizontalLeftAlignmentOutOfBounds(tipView, toolTip.getRootView(), point, anchorViewCoordinates, rootLocation);
} else if (toolTip.alignedRight()){
AdjustHorizotalRightAlignmentOutOfBounds(tipView, toolTip.getRootView(), point, anchorViewCoordinates, rootLocation);
}
point.y = anchorViewCoordinates.bottom;
return point;
}
private static Point getPositionAbove(TextView tipView, ToolTip toolTip,
Coordinates anchorViewCoordinates, Coordinates rootLocation) {
Point point = new Point();
point.x = anchorViewCoordinates.left + getXOffset(tipView, toolTip);
if (toolTip.alignedCenter()) {
AdjustHorizontalCenteredOutOfBounds(tipView, toolTip.getRootView(), point, rootLocation);
} else if (toolTip.alignedLeft()){
AdjustHorizontalLeftAlignmentOutOfBounds(tipView, toolTip.getRootView(), point, anchorViewCoordinates, rootLocation);
} else if (toolTip.alignedRight()){
AdjustHorizotalRightAlignmentOutOfBounds(tipView, toolTip.getRootView(), point, anchorViewCoordinates, rootLocation);
}
point.y = anchorViewCoordinates.top - tipView.getMeasuredHeight();
return point;
}
private static void AdjustRightToOutOfBounds(TextView tipView, ViewGroup root, Point point, Coordinates anchorViewCoordinates, Coordinates rootLocation) {
ViewGroup.LayoutParams params = tipView.getLayoutParams();
int availableSpace = rootLocation.right - root.getPaddingRight() - anchorViewCoordinates.right;
if (point.x + tipView.getMeasuredWidth() > rootLocation.right - root.getPaddingRight()){
params.width = availableSpace;
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
tipView.setLayoutParams(params);
measureViewWithFixedWidth(tipView, params.width);
}
}
private static void AdjustLeftToOutOfBounds(TextView tipView, ViewGroup root, Point point, Coordinates anchorViewCoordinates, Coordinates rootLocation) {
ViewGroup.LayoutParams params = tipView.getLayoutParams();
int rootLeft = rootLocation.left + root.getPaddingLeft();
if (point.x < rootLeft){
int availableSpace = anchorViewCoordinates.left - rootLeft;
point.x = rootLeft;
params.width = availableSpace;
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
tipView.setLayoutParams(params);
measureViewWithFixedWidth(tipView, params.width);
}
}
private static void AdjustHorizotalRightAlignmentOutOfBounds(TextView tipView, ViewGroup root,
Point point, Coordinates anchorViewCoordinates,
Coordinates rootLocation) {
ViewGroup.LayoutParams params = tipView.getLayoutParams();
int rootLeft = rootLocation.left + root.getPaddingLeft();
if (point.x < rootLeft){
int availableSpace = anchorViewCoordinates.right - rootLeft;
point.x = rootLeft;
params.width = availableSpace;
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
tipView.setLayoutParams(params);
measureViewWithFixedWidth(tipView, params.width);
}
}
private static void AdjustHorizontalLeftAlignmentOutOfBounds(TextView tipView, ViewGroup root,
Point point, Coordinates anchorViewCoordinates,
Coordinates rootLocation) {
ViewGroup.LayoutParams params = tipView.getLayoutParams();
int rootRight = rootLocation.right - root.getPaddingRight();
if (point.x + tipView.getMeasuredWidth() > rootRight){
params.width = rootRight - anchorViewCoordinates.left;
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
tipView.setLayoutParams(params);
measureViewWithFixedWidth(tipView, params.width);
}
}
private static void AdjustHorizontalCenteredOutOfBounds(TextView tipView, ViewGroup root,
Point point, Coordinates rootLocation) {
ViewGroup.LayoutParams params = tipView.getLayoutParams();
int rootWidth = root.getWidth() - root.getPaddingLeft() - root.getPaddingRight();
if (tipView.getMeasuredWidth() > rootWidth) {
point.x = rootLocation.left + root.getPaddingLeft();
params.width = rootWidth;
params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
tipView.setLayoutParams(params);
measureViewWithFixedWidth(tipView, rootWidth);
}
}
private static void measureViewWithFixedWidth(TextView tipView, int width) {
tipView.measure(View.MeasureSpec.makeMeasureSpec(width,
View.MeasureSpec.EXACTLY), ViewGroup.LayoutParams.WRAP_CONTENT);
}
/**
* calculate the amount of movement need to be taken inorder to align tip
* on X axis according to "align" parameter
* @return int
*/
private static int getXOffset(View tipView, ToolTip toolTip) {
int offset;
switch (toolTip.getAlign()) {
case ToolTip.ALIGN_CENTER:
offset = ((toolTip.getAnchorView().getWidth() - tipView.getMeasuredWidth()) / 2);
break;
case ToolTip.ALIGN_LEFT:
offset = 0;
break;
case ToolTip.ALIGN_RIGHT:
offset = toolTip.getAnchorView().getWidth() - tipView.getMeasuredWidth();
break;
default:
offset = 0;
break;
}
return offset;
}
/**
* calculate the amount of movement need to be taken inorder to center tip
* on Y axis
* @return int
*/
private static int getYCenteringOffset(View tipView, ToolTip toolTip) {
return (toolTip.getAnchorView().getHeight() - tipView.getMeasuredHeight()) / 2;
}
}