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The source code is released under:
Apache License
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package lecho.lib.hellocharts.view; /*w w w . j a va2s . co m*/ import lecho.lib.hellocharts.ChartComputator; import lecho.lib.hellocharts.ViewportChangeListener; import lecho.lib.hellocharts.animation.ChartAnimationListener; import lecho.lib.hellocharts.gesture.ChartTouchHandler; import lecho.lib.hellocharts.gesture.ContainerScrollType; import lecho.lib.hellocharts.gesture.ZoomType; import lecho.lib.hellocharts.model.ChartData; import lecho.lib.hellocharts.model.SelectedValue; import lecho.lib.hellocharts.model.Viewport; import lecho.lib.hellocharts.renderer.AxesRenderer; import lecho.lib.hellocharts.renderer.ChartRenderer; /** * Interface for all charts. Every chart must implements this interface but chart doesn't really have to extends View or * ViewGroup class. It can be any java class for example chart that only draw on in-memory bitmap and saves it on sd * card. */ public interface Chart { /** * Returns generic chart data. For specific class call get*ChartData method from data provider implementation. */ public ChartData getChartData(); public ChartRenderer getChartRenderer(); public AxesRenderer getAxesRenderer(); public ChartComputator getChartComputator(); public ChartTouchHandler getTouchHandler(); /** * Updates chart data with given scale. Called during chart data animation update. */ public void animationDataUpdate(float scale); /** * Called when data animation finished. */ public void animationDataFinished(); /** * Starts chart data animation for given duration. Before you call this method you should change target values of * chart data. */ public void startDataAnimation(); /** * Starts chart data animation for given duration. If duration is negative the default value of 500ms will be used. * Before you call this method you should change target values of chart data. */ public void startDataAnimation(long duration); /** * Stops chart data animation. All chart data values are set to their target values. */ public void cancelDataAnimation(); /** * Return true if auto viewports recalculations are enabled, false otherwise. */ public boolean isViewportCalculationEnabled(); /** * Set true to enable viewports(max and current) recalculations during animations or after set*ChartData method is * called. If you disable viewports calculations viewports will not change until you change them manually or enable * calculations again. Disabled viewport calculations is usefull if you want show only part of chart by setting * custom viewport and don't want any operation to change that viewport */ public void setViewportCalculationEnabled(boolean isEnabled); /** * Set listener for data animation to be notified when data animation started and finished. By default that flag is * set to true so be careful with animation and custom viewports. */ public void setDataAnimationListener(ChartAnimationListener animationListener); /** * Set listener for viewport animation to be notified when viewport animation started and finished. */ public void setViewportAnimationListener(ChartAnimationListener animationListener); /** * Set listener for current viewport changes. It will be called when viewport change either by gesture or * programmatically. Note! This method works only for preview charts. It is intentionally disabled for other types * of charts to avoid unnecessary method calls during invalidation. * */ public void setViewportChangeListener(ViewportChangeListener viewportChangeListener); public void callTouchListener(); /** * Returns true if chart is interactive. * * @see #setInteractive(boolean) */ public boolean isInteractive(); /** * Set true to allow user use touch gestures. If set to false user will not be able zoom, scroll or select/touch * value. By default true. */ public void setInteractive(boolean isInteractive); /** * Returns true if pitch to zoom and double tap zoom is enabled. * * @see #setZoomEnabled(boolean) */ public boolean isZoomEnabled(); /** * Set true to enable zoom, false to disable, by default true; */ public void setZoomEnabled(boolean isZoomEnabled); /** * Returns true if scrolling is enabled. * * @see #setScrollEnabled(boolean) */ public boolean isScrollEnabled(); /** * Set true to enable touch scroll/fling, false to disable touch scroll/fling, by default true; */ public void setScrollEnabled(boolean isScrollEnabled); /** * Move/Srcoll viewport to position x,y(that position must be within maximum chart viewport). If possible viewport * will be centered at this point. Width and height of viewport will not be modified. * * @see #setCurrentViewport(Viewport, boolean); */ public void moveTo(float x, float y, boolean isAnimated); /** * Returns current zoom type for this chart. * * @see #setZoomType(ZoomType) */ public ZoomType getZoomType(); /** * Set zoom type, available options: ZoomType.HORIZONTAL_AND_VERTICAL, ZoomType.HORIZONTAL, ZoomType.VERTICAL. By * default HORIZONTAL_AND_VERTICAL. */ public void setZoomType(ZoomType zoomType); /** * Returns current maximum zoom value. * */ public float getMaxZoom(); /** * Set max zoom value within range (1 - 20). Default maximum zoom is 20. * */ public void setMaxZoom(float maxZoom); /** * Returns current zoom level. */ public float getZoomLevel(); /** * Programatically zoom chart to given point(viewport point). Call this method after chart data had been set. * * @param x * x within chart maximum viewport * @param y * y within chart maximum viewport * @param zoomLevel * value from 1 to maxZoom(default 20). 1 means chart has no zoom, 20 means chart has maximum zoom. * @param isAnimated * set true if zoom should be animated. */ public void setZoomLevel(float x, float y, float zoomLevel, boolean isAnimated); /** * Return true if chart value can be touched. * * @see #setValueTouchEnabled(boolean) */ public boolean isValueTouchEnabled(); /** * Set true if you want allow user to click value on chart, set false to disable that option. By default true. */ public void setValueTouchEnabled(boolean isValueTouchEnabled); /** * Returns maximum viewport for this chart. Don't modify it directly, use {@link #setMaximumViewport(Viewport)} * instead. * * @see #setMaximumViewport(Viewport) */ public Viewport getMaximumViewport(); /** * Set maximum viewport. If you set bigger maximum viewport data will be more concentrate and there will be more * empty spaces on sides. * * Note. MaxViewport have to be set after chartData has been set. */ public void setMaximumViewport(Viewport maxViewport); /** * Returns current viewport. Don't modify it directly, use {@link #setCurrentViewport(Viewport, boolean)} instead. * * @see #setCurrentViewport(Viewport, boolean) */ public Viewport getCurrentViewport(); /** * Sets current viewport. If isAnimated is true chart will be animated during viewport changes. * * Note. viewport have to be set after chartData has been set. */ public void setCurrentViewport(Viewport targetViewport, boolean isAnimated); /** * Reset maximum viewport and current viewport. Values for both viewports will be auto-calculated using current * chart data ranges. */ public void resetViewports(); /** * Return true if value selection mode is enabled. * * @see #setValueSelectionEnabled(boolean) */ public boolean isValueSelectionEnabled(); /** * Set true if you want value selection with touch - value will stay selected until you touch somewhere else on the * chart area. By default false and value is automatically unselected when user stop pressing on it. */ public void setValueSelectionEnabled(boolean isValueSelectionEnabled); /** * Select single value on chart. If indexes are not valid IndexOutOfBoundsException will be thrown. */ public void selectValue(SelectedValue selectedValue); /** * Return currently selected value indexes. */ public SelectedValue getSelectedValue(); /** * @see #setContainerScrollEnabled(boolean, ContainerScrollType) */ public boolean isContainerScrollEnabled(); /** * Set isContainerScrollEnabled to true and containerScrollType to HORIZONTAL or VERTICAL if you are using chart * within scroll container. */ public void setContainerScrollEnabled(boolean isContainerScrollEnabled, ContainerScrollType containerScrollType); }