504 lines
22 KiB
Objective-C
Executable File
504 lines
22 KiB
Objective-C
Executable File
//
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// JBLineChartView.h
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// JBChartView
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//
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// Created by Terry Worona on 9/4/13.
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// Copyright (c) 2013 Jawbone. All rights reserved.
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//
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#import "JBChartView.h"
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@class JBLineChartView;
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/**
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* Indicates how a line's main path will be drawn.
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*/
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typedef NS_ENUM(NSInteger, JBLineChartViewLineStyle){
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/**
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* Solid line.
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*/
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JBLineChartViewLineStyleSolid,
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/**
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* Dashed with a 3:2 phase (3 points dashed, 2 points spaced).
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*/
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JBLineChartViewLineStyleDashed
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};
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/**
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* Indicates how a line's main path or fill (including selections)
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* will be decorated (via color options).
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*/
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typedef NS_ENUM(NSInteger, JBLineChartViewColorStyle) {
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/**
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* A solid color (with alpha support via UIColor).
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*/
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JBLineChartViewColorStyleSolid,
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/**
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* a gradient (via CAGradientLayer).
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*/
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JBLineChartViewColorStyleGradient
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};
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@protocol JBLineChartViewDataSource <JBChartViewDataSource>
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@required
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/**
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* Returns the number of lines for the line chart.
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*
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* @param lineChartView The line chart object requesting this information.
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*
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* @return The number of lines in the line chart.
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*/
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- (NSUInteger)numberOfLinesInLineChartView:(JBLineChartView *)lineChartView;
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/**
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* Returns the number of vertical values for a particular line at lineIndex within the chart.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The number of vertical values for a given line in the line chart.
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*/
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- (NSUInteger)lineChartView:(JBLineChartView *)lineChartView numberOfVerticalValuesAtLineIndex:(NSUInteger)lineIndex;
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@optional
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/**
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* Returns whether or not a line should show a dot for each point.
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* Dot size is relative to the line width and not adjustable.
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* Dot color is equal to the line color and not adjustable.
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*
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* Default: NO.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return Whether or not a line should show a dot for each chart point.
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*/
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- (BOOL)lineChartView:(JBLineChartView *)lineChartView showsDotsForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns whether or not a line should be rendered with curved connections and rounded end caps.
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*
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* Default: NO.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return Whether or not a line should smooth it's connections and end caps.
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*/
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- (BOOL)lineChartView:(JBLineChartView *)lineChartView smoothLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the opacity value to be used for dimming the line & fill during selection events.
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* This value is applied to the line or fill's opacity anytime it's not selected (but another line is).
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* This applies to both solid and gradient color styles.
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*
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* Default: 0.2.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return A value between 0.0 and 1.0 (will be clamped accordingly).
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*/
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- (CGFloat)lineChartView:(JBLineChartView *)lineChartView dimmedSelectionOpacityAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the opacity value to be used for dimming the dots during selection events.
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* This value is applied to all dots within a line anytime it's not selected (but another line is).
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*
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* Default: 0.0.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return A value between 0.0 and 1.0 (will be clamped accordingly).
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*/
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- (CGFloat)lineChartView:(JBLineChartView *)lineChartView dimmedSelectionDotOpacityAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns a (custom) UIView instance representing a dot (x,y point) within the chart.
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* For this value to apply, showsDotsForLineAtLineIndex: must return YES for the line at lineIndex.
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* This protocol supercedes colorForDotAtHorizontalIndex: and dotRadiusForDotAtHorizontalIndex:.
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* If nil is returned. the original dot protocols will take precedence. During selection events, a custom
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* dot view will not be hidden unless lineChartView:shouldHideDotViewOnSelectionAtHorizontalIndex:atLineIndex:
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* is implemented.
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*
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* Default: nil.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param horizontalIndex The 0-based horizontal index of a selection point (left to right, x-axis).
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return A custom UIView instance representing a dot at a particular horizontal index within a dotted line.
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*/
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- (UIView *)lineChartView:(JBLineChartView *)lineChartView dotViewAtHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns whether or not a (custom) dot view should be hidden on selection events.
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*
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* Default: NO.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param horizontalIndex The 0-based horizontal index of a selection point (left to right, x-axis).
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return Whether or not a (custom) dot view should be hidden on selection events.
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*/
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- (BOOL)lineChartView:(JBLineChartView *)lineChartView shouldHideDotViewOnSelectionAtHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex;
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@end
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@protocol JBLineChartViewDelegate <JBChartViewDelegate>
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@required
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/**
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* Vertical value for a line point at a given index (left to right). There is no ceiling on the the height;
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* the chart will automatically normalize all values between the overal min and max heights.
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* NAN may able be retuend to indicate missing values. The chart's line will begin at the first non-NAN value and end at the last non-NAN value.
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* Furthermore, the line will interopolate any NAN values in between (ie. the line will not be interrupted).
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*
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* @param lineChartView The line chart object requesting this information.
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* @param horizontalIndex The 0-based horizontal index of a selection point (left to right, x-axis).
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* @param lineIndex An index number identifying the closest line in the chart to the current touch point.
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*
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* @return The y-axis value of the supplied line index (x-axis)
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*/
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- (CGFloat)lineChartView:(JBLineChartView *)lineChartView verticalValueForHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex;
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@optional
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/**
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* Occurs whenever there is a touch gesture on the chart (chart must be expanded).
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* The horizontal index is the closest index to the touch point & is clamped to it's max/min value if it moves outside of the view's bounds.
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* The lineIndex remains constant until the line is deselected and will be highlighted using the (optional) selectionColorForLineAtLineIndex: protocol.
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* Futhermore, all other lines that aren't selected will be dimmed to 20% opacity (default) throughout the duration of the touch/move.
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* Any dotted line that isn't the primary selection will have it's dots dimmed to hidden (to avoid transparency issues).
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*
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* @param lineChartView A line chart object informing the delegate about the new selection.
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* @param lineIndex An index number identifying the closest line in the chart to the current touch
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* @param horizontalIndex The 0-based horizontal index of a selection point (left to right, x-axis).
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* @param touchPoint The touch point in relation to the chart's bounds (excludes footer and header).
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*/
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- (void)lineChartView:(JBLineChartView *)lineChartView didSelectLineAtIndex:(NSUInteger)lineIndex horizontalIndex:(NSUInteger)horizontalIndex touchPoint:(CGPoint)touchPoint;
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- (void)lineChartView:(JBLineChartView *)lineChartView didSelectLineAtIndex:(NSUInteger)lineIndex horizontalIndex:(NSUInteger)horizontalIndex;
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/**
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* Occurs when selection ends by ending a touch event. For selection start events, see: didSelectChartAtIndex:
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*
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* @param lineChartView A line chart object informing the delegate about the deselection.
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*/
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- (void)didDeselectLineInLineChartView:(JBLineChartView *)lineChartView;
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/**
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* Returns whether or not a line at a particular index responds to selection events.
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*
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* Default: YES
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*
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* @param lineChartView A line chart object informing the delegate about the new selection.
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* @param lineIndex An index number identifying the closest line in the chart to the current touch
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*/
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- (BOOL)lineChartView:(JBLineChartView *)lineChartView shouldIgnoreSelectionAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the color of particular line at lineIndex.
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* For this to apply, lineChartView:colorStyleForLineAtLineIndex: must return JBLineChartViewColorStyleSolid (default).
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*
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* Default: black color.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The color to be used to shade a line in the chart.
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*/
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- (UIColor *)lineChartView:(JBLineChartView *)lineChartView colorForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the gradient layer to be used for a particular line at lineIndex within the chart.
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* For this to apply, lineChartView:colorStyleForLineAtLineIndex: must return JBLineChartViewColorStyleGradient.
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*
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* Note: gradients do not support multiple alphas. The alpha of gradient's first color be used throughout.
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*
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* Default: black to light gray.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The gradient layer to be used to shade a line in the chart.
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*/
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- (CAGradientLayer *)lineChartView:(JBLineChartView *)lineChartView gradientForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the fill color of particular line at lineIndex within the chart.
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* For this to apply, lineChartView:fillColorStyleForLineAtLineIndex: must return JBLineChartViewColorStyleSolid (default).
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*
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* Default: clear color (none).
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The fill color to show under a line in the chart.
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*/
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- (UIColor *)lineChartView:(JBLineChartView *)lineChartView fillColorForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the gradient layer to be used for a fill of a particular line at lineIndex within the chart.
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* For this to apply, lineChartView:fillColorStyleForLineAtLineIndex: must return JBLineChartViewColorStyleGradient.
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*
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* Note: gradients do not support multiple alphas. The alpha of gradient's first color be used throughout.
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*
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* Default: clear gradient (none).
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The fill gradient to show under a line in the chart.
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*/
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- (CAGradientLayer *)lineChartView:(JBLineChartView *)lineChartView fillGradientForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the color of a particular dot in a line at lineIndex within the chart.
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* For this value to apply, showsDotsForLineAtLineIndex: must return YES for the line at lineIndex.
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* Any value can be returned for lineIndex's that don't support dots, as it will never be called.
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*
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* Default: black color.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param horizontalIndex The 0-based horizontal index of a selection point (left to right, x-axis)
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The color to be used to color a dot within a dotted line in the chart.
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*/
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- (UIColor *)lineChartView:(JBLineChartView *)lineChartView colorForDotAtHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the width of particular line at lineIndex within the chart.
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*
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* Default: 5 points.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The width to be used to draw a line in the chart.
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*/
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- (CGFloat)lineChartView:(JBLineChartView *)lineChartView widthForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the radius of all dots in a particular line at lineIndex within the chart.
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* For this value to apply, showsDotsForLineAtLineIndex: must return YES for the line at lineIndex.
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* Any value can be returned for lineIndex's that don't support dots, as it will never be called.
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*
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* Default: line width x 6.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param horizontalIndex The 0-based horizontal index of a selection point (left to right, x-axis).
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The radius of the dots within a dotted line in the chart.
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*/
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- (CGFloat)lineChartView:(JBLineChartView *)lineChartView dotRadiusForDotAtHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the width of the (vertical) selection view to be overlayed on the chart during touch events.
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* The property showsVerticalSelection must be YES for the width to apply. The width is clamped to the
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* maxmimum width of the chart's bounds.
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*
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* Default: 20px.
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*
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* @param lineChartView The line chart object requesting this information.
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*
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* @return The width of the selection view used during chart selections.
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*/
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- (CGFloat)verticalSelectionWidthForLineChartView:(JBLineChartView *)lineChartView;
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/**
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* Returns the (vertical) selection color to be overlayed on the chart during touch events on a given line.
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* The color is automically faded to transparent (vertically). The property showsVerticalSelection
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* must be YES for the color to apply.
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*
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* Default: white color.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The color of the selection view used during chart selections of the given line.
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*/
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- (UIColor *)lineChartView:(JBLineChartView *)lineChartView verticalSelectionColorForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the selection color of a line within the chart during touch events.
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* The property showsLineSelection must be YES for the color to apply.
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* As well, lineChartView:colorStyleForLineAtLineIndex: must return JBLineChartViewColorStyleSolid (default)
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*
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* Default: matches lineChartView:colorForLineAtLineIndex:.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The color to be used to highlight a line during chart selections.
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*/
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- (UIColor *)lineChartView:(JBLineChartView *)lineChartView selectionColorForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the selection gradient layer of a line within the chart during touch events.
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* The property showsLineSelection must be YES for the color to apply.
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* As well, lineChartView:colorStyleForLineAtLineIndex: must return JBLineChartViewColorStyleGradient.
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*
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* Note: gradients do not support multiple alphas. The alpha of gradient's first color be used throughout.
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*
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* Default: matches lineChartView:gradientForLineAtLineIndex:.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The gradient layer to be used to highlight a line during chart selections.
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*/
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- (CAGradientLayer *)lineChartView:(JBLineChartView *)lineChartView selectionGradientForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the selection fill color under a line within the chart during touch events.
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* The property showsLineSelection must be YES for the color to apply.
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* As well, lineChartView:fillColorStyleForLineAtLineIndex: must return JBLineChartViewColorStyleSolid (default).
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*
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* Default: matches lineChartView:fillColorForLineAtLineIndex:.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The color to be used to highlight under a line during chart selections.
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*/
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- (UIColor *)lineChartView:(JBLineChartView *)lineChartView selectionFillColorForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the selection fill gradient layer under a line within the chart during touch events.
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* The property showsLineSelection must be YES for the color to apply.
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* As well, lineChartView:fillColorStyleForLineAtLineIndex: must return JBLineChartViewColorStyleGrdient.
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*
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* Note: gradients do not support multiple alphas. The alpha of gradient's first color be used throughout.
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*
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* Default: matches lineChartView:fillGradientForLineAtLineIndex.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The gradient layer to be used to highlight under a line during chart selections.
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*/
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- (CAGradientLayer *)lineChartView:(JBLineChartView *)lineChartView selectionFillGradientForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the selection color to be overlayed on a line within the chart during touch events.
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* The property showsLineSelection must be YES for the color to apply.
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*
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* Default: matches lineChartView:colorForDotAtHorizontalIndex:atLineIndex:(NSUInteger)lineIndex.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param horizontalIndex The 0-based horizontal index of a selection point (left to right, x-axis).
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The color to be used to highlight a dot within a dotted line during chart selections.
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*/
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- (UIColor *)lineChartView:(JBLineChartView *)lineChartView selectionColorForDotAtHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the line style of a particular line at lineIndex within the chart.
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* See JBLineChartViewLineStyle for line style descriptions.
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*
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* Default: JBLineChartViewLineStyleSolid.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The line style to be used to draw a line in the chart.
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*/
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- (JBLineChartViewLineStyle)lineChartView:(JBLineChartView *)lineChartView lineStyleForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the line color style of a particular line at lineIndex within the chart.
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* The line color style applies to both selected and non-selected scenarios.
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* See JBLineChartViewColorStyle for color style descriptions.
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*
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* Default: JBLineChartViewColorStyleSolid.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The color style to be used to shade a line in the chart.
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*/
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- (JBLineChartViewColorStyle)lineChartView:(JBLineChartView *)lineChartView colorStyleForLineAtLineIndex:(NSUInteger)lineIndex;
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/**
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* Returns the fill color style of a particular line at lineIndex within the chart.
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* The fill color style applies to both selected and non-selected scenarios.
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* See JBLineChartViewColorStyle for color style descriptions.
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*
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* Default: JBLineChartViewColorStyleSolid.
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*
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* @param lineChartView The line chart object requesting this information.
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The fill color style to show under a line in the chart.
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*/
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- (JBLineChartViewColorStyle)lineChartView:(JBLineChartView *)lineChartView fillColorStyleForLineAtLineIndex:(NSUInteger)lineIndex;
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@end
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@interface JBLineChartView : JBChartView
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@property (nonatomic, weak) id<JBLineChartViewDataSource> dataSource;
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@property (nonatomic, weak) id<JBLineChartViewDelegate> delegate;
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/*
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* Reloads the line chart with a custom animation.
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* Adding, removing or modifying existing lines or dot views (via growing/shrinking & fading) if animated = YES;
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* Reloading (animated) data is thread safe and can be executed any number of times in succession.
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*
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* Note: fills will not be animated (technical limitation of Apple's CG API).
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*
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* Default: a non-animated reload (via reloadData).
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*/
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- (void)reloadDataAnimated:(BOOL)animated;
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/*
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* When reloadData or reloadDataAnimated: is called, the reloading bit is turned on.
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* State changes during a reload will be ignored. As well, subsequent calls to reloadData:
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* or reloadDataAnimated: before any previous reloads are complete, will also be ignored.
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* Lastly, all touch events will be ignored until a reload has compeleted.
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*
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* Note: the above restrictions apply only to animated reloads, as non-animated reloads are synchronous.
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*
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* Default: NO.
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*/
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@property (nonatomic, readonly) BOOL reloading;
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/**
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* Vertical highlight overlayed on a line graph during touch events.
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*
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* Default: YES.
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*/
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@property (nonatomic, assign) BOOL showsVerticalSelection;
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/**
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* A highlight shown on a line within the graph during touch events. The highlighted line
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* is the closest line to the touch point and corresponds to the lineIndex delegatd back via
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* didSelectChartAtHorizontalIndex:atLineIndex: and didUnSlectChartAtHorizontalIndex:atLineIndex:
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*
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* Default: YES.
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*/
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@property (nonatomic, assign) BOOL showsLineSelection;
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/**
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* The dot view within a particular line at a horizontalIndex.
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*
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* Default: nil.
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*
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* @param horizontalIndex The 0-based horizontal index of a selection point (left to right, x-axis)
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* @param lineIndex An index number identifying a line in the chart.
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*
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* @return The UIView representing the dot view at a given horizontalIndex within a line or nil if any index is out of range.
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*/
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- (UIView *)dotViewAtHorizontalIndex:(NSUInteger)horizontalIndex atLineIndex:(NSUInteger)lineIndex;
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@end
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