1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.calendar; 18 19 import android.graphics.Rect; 20 21 public class EventGeometry { 22 // This is the space from the grid line to the event rectangle. 23 private int mCellMargin = 0; 24 25 private float mMinuteHeight; 26 27 private float mHourGap; 28 private float mMinEventHeight; 29 30 void setCellMargin(int cellMargin) { 31 mCellMargin = cellMargin; 32 } 33 34 public void setHourGap(float gap) { 35 mHourGap = gap; 36 } 37 38 public void setMinEventHeight(float height) { 39 mMinEventHeight = height; 40 } 41 42 public void setHourHeight(float height) { 43 mMinuteHeight = height / 60.0f; 44 } 45 46 // Computes the rectangle coordinates of the given event on the screen. 47 // Returns true if the rectangle is visible on the screen. 48 public boolean computeEventRect(int date, int left, int top, int cellWidth, Event event) { 49 if (event.drawAsAllday()) { 50 return false; 51 } 52 53 float cellMinuteHeight = mMinuteHeight; 54 int startDay = event.startDay; 55 int endDay = event.endDay; 56 57 if (startDay > date || endDay < date) { 58 return false; 59 } 60 61 int startTime = event.startTime; 62 int endTime = event.endTime; 63 64 // If the event started on a previous day, then show it starting 65 // at the beginning of this day. 66 if (startDay < date) { 67 startTime = 0; 68 } 69 70 // If the event ends on a future day, then show it extending to 71 // the end of this day. 72 if (endDay > date) { 73 endTime = DayView.MINUTES_PER_DAY; 74 } 75 76 int col = event.getColumn(); 77 int maxCols = event.getMaxColumns(); 78 int startHour = startTime / 60; 79 int endHour = endTime / 60; 80 81 // If the end point aligns on a cell boundary then count it as 82 // ending in the previous cell so that we don't cross the border 83 // between hours. 84 if (endHour * 60 == endTime) 85 endHour -= 1; 86 87 event.top = top; 88 event.top += (int) (startTime * cellMinuteHeight); 89 event.top += startHour * mHourGap; 90 91 event.bottom = top; 92 event.bottom += (int) (endTime * cellMinuteHeight); 93 event.bottom += endHour * mHourGap - 1; 94 95 // Make the rectangle be at least mMinEventHeight pixels high 96 if (event.bottom < event.top + mMinEventHeight) { 97 event.bottom = event.top + mMinEventHeight; 98 } 99 100 float colWidth = (float) (cellWidth - (maxCols + 1) * mCellMargin) / (float) maxCols; 101 event.left = left + col * (colWidth + mCellMargin); 102 event.right = event.left + colWidth; 103 return true; 104 } 105 106 /** 107 * Returns true if this event intersects the selection region. 108 */ 109 boolean eventIntersectsSelection(Event event, Rect selection) { 110 if (event.left < selection.right && event.right >= selection.left 111 && event.top < selection.bottom && event.bottom >= selection.top) { 112 return true; 113 } 114 return false; 115 } 116 117 /** 118 * Computes the distance from the given point to the given event. 119 */ 120 float pointToEvent(float x, float y, Event event) { 121 float left = event.left; 122 float right = event.right; 123 float top = event.top; 124 float bottom = event.bottom; 125 126 if (x >= left) { 127 if (x <= right) { 128 if (y >= top) { 129 if (y <= bottom) { 130 // x,y is inside the event rectangle 131 return 0f; 132 } 133 // x,y is below the event rectangle 134 return y - bottom; 135 } 136 // x,y is above the event rectangle 137 return top - y; 138 } 139 140 // x > right 141 float dx = x - right; 142 if (y < top) { 143 // the upper right corner 144 float dy = top - y; 145 return (float) Math.sqrt(dx * dx + dy * dy); 146 } 147 if (y > bottom) { 148 // the lower right corner 149 float dy = y - bottom; 150 return (float) Math.sqrt(dx * dx + dy * dy); 151 } 152 // x,y is to the right of the event rectangle 153 return dx; 154 } 155 // x < left 156 float dx = left - x; 157 if (y < top) { 158 // the upper left corner 159 float dy = top - y; 160 return (float) Math.sqrt(dx * dx + dy * dy); 161 } 162 if (y > bottom) { 163 // the lower left corner 164 float dy = y - bottom; 165 return (float) Math.sqrt(dx * dx + dy * dy); 166 } 167 // x,y is to the left of the event rectangle 168 return dx; 169 } 170 } 171
