Heart Rate Graph

This data field shows the current heart rate and draws a graph with recent values in the background. - draws history, one pixel per second. - configurable min, max, and threshold. - three graph colors: below threshold, above threshold, above max. - dedicated color palette for day and night mode. - optimized battery consumption: keeps the graph in an offscreen bitmap to avoid full redraws (full redraws are 10x slower). Testing settings: - Demo mode: shows a linear ramp to test color palettes. - Timing: Display the graph redraw time in milliseconds in the field label. It's about 20ms on the Edge 820. Color customization: The graph colors can be customized in the settings form. For each palette, bright and dark, three colors are used. Specify them as a hexadecimal RGB numeric value. Each color channel is repressented by one byte. E.g. 0xff0000 is bright red, 0x0000ff is bright blue. The Garmin developer documentation has a table of available colors. https://developer.garmin.com/connect-iq/user-experience-guide/page-layout/#bitmaps Invalid values cause a silent fallback to the default color, because there is no good way to signal an error for a CIQ datafield.

1.1.0: - Add graph color customization. 1.0.3: - Tune font adaption to be equal to the power graph field. 1.0.2: - Fix a glitch in the graph when the field was invisible. - Support Edge 530/830, rebuild with new SDK.