/
RelativePopupWindow.java
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/
RelativePopupWindow.java
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package com.labo.kaji.relativepopupwindow;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Rect;
import android.os.Build;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.PopupWindow;
import androidx.annotation.IntDef;
import androidx.annotation.NonNull;
import androidx.core.widget.PopupWindowCompat;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* @author kakajika
* @since 2016/07/01
*/
public class RelativePopupWindow extends PopupWindow {
@IntDef({
VerticalPosition.CENTER,
VerticalPosition.ABOVE,
VerticalPosition.BELOW,
VerticalPosition.ALIGN_TOP,
VerticalPosition.ALIGN_BOTTOM,
})
@Retention(RetentionPolicy.SOURCE)
public @interface VerticalPosition {
int CENTER = 0;
int ABOVE = 1;
int BELOW = 2;
int ALIGN_TOP = 3;
int ALIGN_BOTTOM = 4;
}
@IntDef({
HorizontalPosition.CENTER,
HorizontalPosition.LEFT,
HorizontalPosition.RIGHT,
HorizontalPosition.ALIGN_LEFT,
HorizontalPosition.ALIGN_RIGHT,
})
@Retention(RetentionPolicy.SOURCE)
public @interface HorizontalPosition {
int CENTER = 0;
int LEFT = 1;
int RIGHT = 2;
int ALIGN_LEFT = 3;
int ALIGN_RIGHT = 4;
}
public RelativePopupWindow(Context context) {
super(context);
}
public RelativePopupWindow(Context context, AttributeSet attrs) {
super(context, attrs);
}
public RelativePopupWindow(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public RelativePopupWindow(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
}
public RelativePopupWindow() {
super();
}
public RelativePopupWindow(View contentView) {
super(contentView);
}
public RelativePopupWindow(int width, int height) {
super(width, height);
}
public RelativePopupWindow(View contentView, int width, int height) {
super(contentView, width, height);
}
public RelativePopupWindow(View contentView, int width, int height, boolean focusable) {
super(contentView, width, height, focusable);
}
/**
* Show at relative position to anchor View.
* @param anchor Anchor View
* @param vertPos Vertical Position Flag
* @param horizPos Horizontal Position Flag
*/
public void showOnAnchor(
@NonNull View anchor,
@VerticalPosition int vertPos,
@HorizontalPosition int horizPos
) {
showOnAnchor(anchor, vertPos, horizPos, 0, 0);
}
/**
* Show at relative position to anchor View.
* @param anchor Anchor View
* @param vertPos Vertical Position Flag
* @param horizPos Horizontal Position Flag
* @param fitInScreen Automatically fit in screen or not
*/
public void showOnAnchor(
@NonNull View anchor,
@VerticalPosition int vertPos,
@HorizontalPosition int horizPos,
boolean fitInScreen
) {
showOnAnchor(anchor, vertPos, horizPos, 0, 0, fitInScreen);
}
/**
* Show at relative position to anchor View with translation.
* @param anchor Anchor View
* @param vertPos Vertical Position Flag
* @param horizPos Horizontal Position Flag
* @param x Translation X
* @param y Translation Y
*/
public void showOnAnchor(
@NonNull View anchor,
@VerticalPosition int vertPos,
@HorizontalPosition int horizPos,
int x,
int y
) {
showOnAnchor(anchor, vertPos, horizPos, x, y, true);
}
/**
* Show at relative position to anchor View with translation.
* @param anchor Anchor View
* @param vertPos Vertical Position Flag
* @param horizPos Horizontal Position Flag
* @param x Translation X
* @param y Translation Y
* @param fitInScreen Automatically fit in screen or not
*/
public void showOnAnchor(
@NonNull View anchor,
@VerticalPosition int vertPos,
@HorizontalPosition int horizPos,
int x,
int y,
boolean fitInScreen
) {
setClippingEnabled(fitInScreen);
final View contentView = getContentView();
final Rect windowRect = new Rect();
contentView.getWindowVisibleDisplayFrame(windowRect);
final int windowW = windowRect.width();
final int windowH = windowRect.height();
contentView.measure(
makeDropDownMeasureSpec(getWidth(), windowW),
makeDropDownMeasureSpec(getHeight(), windowH)
);
final int measuredW = contentView.getMeasuredWidth();
final int measuredH = contentView.getMeasuredHeight();
final int[] anchorLocation = new int[2];
anchor.getLocationInWindow(anchorLocation);
final int anchorBottom = anchorLocation[1] + anchor.getHeight();
if (!fitInScreen) {
x += anchorLocation[0];
y += anchorBottom;
}
switch (vertPos) {
case VerticalPosition.ABOVE:
y -= measuredH + anchor.getHeight();
break;
case VerticalPosition.ALIGN_BOTTOM:
y -= measuredH;
break;
case VerticalPosition.CENTER:
y -= anchor.getHeight()/2 + measuredH/2;
break;
case VerticalPosition.ALIGN_TOP:
y -= anchor.getHeight();
break;
case VerticalPosition.BELOW:
// Default position.
break;
}
switch (horizPos) {
case HorizontalPosition.LEFT:
x -= measuredW;
break;
case HorizontalPosition.ALIGN_RIGHT:
x -= measuredW - anchor.getWidth();
break;
case HorizontalPosition.CENTER:
x += anchor.getWidth()/2 - measuredW/2;
break;
case HorizontalPosition.ALIGN_LEFT:
// Default position.
break;
case HorizontalPosition.RIGHT:
x += anchor.getWidth();
break;
}
if (fitInScreen) {
if (y + anchorBottom < 0) {
y = -anchorBottom;
} else if (y + anchorBottom + measuredH > windowH) {
y = windowH - anchorBottom - measuredH;
}
PopupWindowCompat.showAsDropDown(this, anchor, x, y, Gravity.NO_GRAVITY);
} else {
showAtLocation(anchor, Gravity.NO_GRAVITY, x, y);
}
}
private static int makeDropDownMeasureSpec(int measureSpec, int maxSize) {
return View.MeasureSpec.makeMeasureSpec(
getDropDownMeasureSpecSize(measureSpec, maxSize),
getDropDownMeasureSpecMode(measureSpec)
);
}
private static int getDropDownMeasureSpecSize(int measureSpec, int maxSize) {
switch (measureSpec) {
case ViewGroup.LayoutParams.MATCH_PARENT:
return maxSize;
default:
return View.MeasureSpec.getSize(measureSpec);
}
}
private static int getDropDownMeasureSpecMode(int measureSpec) {
switch (measureSpec) {
case ViewGroup.LayoutParams.WRAP_CONTENT:
return View.MeasureSpec.UNSPECIFIED;
default:
return View.MeasureSpec.EXACTLY;
}
}
}