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Refactored vu meter into own widget class

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This commit is contained in:
0xFEEDC0DE64
2020-06-12 22:22:52 +02:00
parent a306cf81ca
commit c899e5922b
3 changed files with 154 additions and 143 deletions
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150
src/displays/metersdisplay.h
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@ -9,6 +9,7 @@
#include "globals.h"
#include "utils.h"
#include "widgets/verticalmeter.h"
#include "widgets/vumeter.h"
namespace {
class MainMenu;
@ -26,14 +27,9 @@ public:
void rotate(int offset) override;
private:
// Draw the analogue meter on the screen
void analogMeter();
VuMeter m_vuMeter;
// Update needle position
void plotNeedle(float value);
float ltx = 0; // Saved x coord of bottom of needle
uint16_t osx = 120, osy = 120; // Saved x & y coords
int d = 0;
static constexpr auto x = 40;
std::array<VerticalMeter, 6> meters{{
@ -44,15 +40,13 @@ private:
VerticalMeter{"A4", 4*x, 160},
VerticalMeter{"A5", 5*x, 160}
}};
int d = 0;
};
void MetersDisplay::initScreen()
{
tft.fillScreen(TFT_BLACK);
analogMeter(); // Draw analogue meter
m_vuMeter.start();
for (auto &meter : meters)
meter.start();
@ -60,16 +54,13 @@ void MetersDisplay::initScreen()
void MetersDisplay::redraw()
{
plotNeedle(avgSpeedKmh);
m_vuMeter.redraw(avgSpeedKmh);
tft.setTextColor(TFT_GREEN, TFT_BLACK);
d += 4; if (d >= 360) d = 0;
// Create a Sine wave for testing
int i{};
for (auto &meter : meters)
meter.redraw(50 + 50 * sin((d + (i++ * 60)) * 0.0174532925));
d += 4; if (d >= 360) d -= 360;
}
void MetersDisplay::rotate(int offset)
@ -83,131 +74,4 @@ void MetersDisplay::rotate(int offset)
switchScreen<StatusDisplay>();
#endif
}
void MetersDisplay::analogMeter()
{
// Meter outline
tft.fillRect(0, 0, 239, 126, TFT_GREY);
tft.fillRect(5, 3, 230, 119, TFT_WHITE);
tft.setTextColor(TFT_BLACK); // Text colour
// Draw ticks every 5 degrees from -50 to +50 degrees (100 deg. FSD swing)
for (int i = -50; i < 51; i += 5) {
// Long scale tick length
int tl = 15;
// Coodinates of tick to draw
float sx = cos((i - 90) * 0.0174532925);
float sy = sin((i - 90) * 0.0174532925);
uint16_t x0 = sx * (100 + tl) + 120;
uint16_t y0 = sy * (100 + tl) + 140;
uint16_t x1 = sx * 100 + 120;
uint16_t y1 = sy * 100 + 140;
// Coordinates of next tick for zone fill
float sx2 = cos((i + 5 - 90) * 0.0174532925);
float sy2 = sin((i + 5 - 90) * 0.0174532925);
int x2 = sx2 * (100 + tl) + 120;
int y2 = sy2 * (100 + tl) + 140;
int x3 = sx2 * 100 + 120;
int y3 = sy2 * 100 + 140;
// Yellow zone limits
//if (i >= -50 && i < 0) {
// tft.fillTriangle(x0, y0, x1, y1, x2, y2, TFT_YELLOW);
// tft.fillTriangle(x1, y1, x2, y2, x3, y3, TFT_YELLOW);
//}
// Green zone limits
if (i >= 0 && i < 25) {
tft.fillTriangle(x0, y0, x1, y1, x2, y2, TFT_GREEN);
tft.fillTriangle(x1, y1, x2, y2, x3, y3, TFT_GREEN);
}
// Orange zone limits
if (i >= 25 && i < 50) {
tft.fillTriangle(x0, y0, x1, y1, x2, y2, TFT_ORANGE);
tft.fillTriangle(x1, y1, x2, y2, x3, y3, TFT_ORANGE);
}
// Short scale tick length
if (i % 25 != 0) tl = 8;
// Recalculate coords incase tick lenght changed
x0 = sx * (100 + tl) + 120;
y0 = sy * (100 + tl) + 140;
x1 = sx * 100 + 120;
y1 = sy * 100 + 140;
// Draw tick
tft.drawLine(x0, y0, x1, y1, TFT_BLACK);
// Check if labels should be drawn, with position tweaks
if (i % 25 == 0) {
// Calculate label positions
x0 = sx * (100 + tl + 10) + 120;
y0 = sy * (100 + tl + 10) + 140;
switch (i / 25) {
case -2: tft.drawCentreString("0", x0, y0 - 12, 2); break;
case -1: tft.drawCentreString("7.5", x0, y0 - 9, 2); break;
case 0: tft.drawCentreString("15", x0, y0 - 6, 2); break;
case 1: tft.drawCentreString("22.5", x0, y0 - 9, 2); break;
case 2: tft.drawCentreString("30", x0, y0 - 12, 2); break;
}
}
// Now draw the arc of the scale
sx = cos((i + 5 - 90) * 0.0174532925);
sy = sin((i + 5 - 90) * 0.0174532925);
x0 = sx * 100 + 120;
y0 = sy * 100 + 140;
// Draw scale arc, don't draw the last part
if (i < 50) tft.drawLine(x0, y0, x1, y1, TFT_BLACK);
}
tft.drawString("KM/h", 5 + 230 - 40, 119 - 20, 2); // Units at bottom right
tft.drawCentreString("KM/h", 120, 70, 4); // Comment out to avoid font 4
tft.drawRect(5, 3, 230, 119, TFT_BLACK); // Draw bezel line
plotNeedle(0.f); // Put meter needle at 0
}
void MetersDisplay::plotNeedle(float value)
{
tft.setTextColor(TFT_BLACK, TFT_WHITE);
char buf[8]; dtostrf(value, 4, 0, buf);
tft.drawRightString(buf, 50, 119 - 25, 4);
if (value < -3) value = -3; // Limit value to emulate needle end stops
if (value > 33) value = 33;
float sdeg = map(value, -3, 33, -150, -30); // Map value to angle
// Calcualte tip of needle coords
float sx = cos(sdeg * 0.0174532925);
float sy = sin(sdeg * 0.0174532925);
// Calculate x delta of needle start (does not start at pivot point)
float tx = tan((sdeg + 90) * 0.0174532925);
// Erase old needle image
tft.drawLine(120 + 20 * ltx - 1, 140 - 20, osx - 1, osy, TFT_WHITE);
tft.drawLine(120 + 20 * ltx, 140 - 20, osx, osy, TFT_WHITE);
tft.drawLine(120 + 20 * ltx + 1, 140 - 20, osx + 1, osy, TFT_WHITE);
// Re-plot text under needle
tft.setTextColor(TFT_BLACK);
tft.drawCentreString("KM/h", 120, 70, 4); // // Comment out to avoid font 4
// Store new needle end coords for next erase
ltx = tx;
osx = sx * 98 + 120;
osy = sy * 98 + 140;
// Draw the needle in the new postion, magenta makes needle a bit bolder
// draws 3 lines to thicken needle
tft.drawLine(120 + 20 * ltx - 1, 140 - 20, osx - 1, osy, TFT_RED);
tft.drawLine(120 + 20 * ltx, 140 - 20, osx, osy, TFT_MAGENTA);
tft.drawLine(120 + 20 * ltx + 1, 140 - 20, osx + 1, osy, TFT_RED);
}
}

2
src/widgets/verticalmeter.h
View File

@ -46,6 +46,8 @@ void VerticalMeter::start()
void VerticalMeter::redraw(int value)
{
tft.setTextColor(TFT_GREEN, TFT_BLACK);
char buf[8];
dtostrf(value, 4, 0, buf);
tft.drawRightString(buf, m_x + 36 - 5, 187 - 27 + 155 - 18, 2);

145
src/widgets/vumeter.h Normal file
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@ -0,0 +1,145 @@
#pragma once
#include "globals.h"
namespace {
class VuMeter
{
public:
void start();
void redraw(float value);
private:
float ltx; // Saved x coord of bottom of needle
uint16_t osx, osy; // Saved x & y coords
};
void VuMeter::start()
{
ltx = 0;
osx = 120;
osy = 120;
// Meter outline
tft.fillRect(0, 0, 239, 126, TFT_GREY);
tft.fillRect(5, 3, 230, 119, TFT_WHITE);
tft.setTextColor(TFT_BLACK); // Text colour
// Draw ticks every 5 degrees from -50 to +50 degrees (100 deg. FSD swing)
for (int i = -50; i < 51; i += 5) {
// Long scale tick length
int tl = 15;
// Coodinates of tick to draw
float sx = cos((i - 90) * 0.0174532925);
float sy = sin((i - 90) * 0.0174532925);
uint16_t x0 = sx * (100 + tl) + 120;
uint16_t y0 = sy * (100 + tl) + 140;
uint16_t x1 = sx * 100 + 120;
uint16_t y1 = sy * 100 + 140;
// Coordinates of next tick for zone fill
float sx2 = cos((i + 5 - 90) * 0.0174532925);
float sy2 = sin((i + 5 - 90) * 0.0174532925);
int x2 = sx2 * (100 + tl) + 120;
int y2 = sy2 * (100 + tl) + 140;
int x3 = sx2 * 100 + 120;
int y3 = sy2 * 100 + 140;
// Yellow zone limits
//if (i >= -50 && i < 0) {
// tft.fillTriangle(x0, y0, x1, y1, x2, y2, TFT_YELLOW);
// tft.fillTriangle(x1, y1, x2, y2, x3, y3, TFT_YELLOW);
//}
// Green zone limits
if (i >= 0 && i < 25) {
tft.fillTriangle(x0, y0, x1, y1, x2, y2, TFT_GREEN);
tft.fillTriangle(x1, y1, x2, y2, x3, y3, TFT_GREEN);
}
// Orange zone limits
if (i >= 25 && i < 50) {
tft.fillTriangle(x0, y0, x1, y1, x2, y2, TFT_ORANGE);
tft.fillTriangle(x1, y1, x2, y2, x3, y3, TFT_ORANGE);
}
// Short scale tick length
if (i % 25 != 0) tl = 8;
// Recalculate coords incase tick lenght changed
x0 = sx * (100 + tl) + 120;
y0 = sy * (100 + tl) + 140;
x1 = sx * 100 + 120;
y1 = sy * 100 + 140;
// Draw tick
tft.drawLine(x0, y0, x1, y1, TFT_BLACK);
// Check if labels should be drawn, with position tweaks
if (i % 25 == 0) {
// Calculate label positions
x0 = sx * (100 + tl + 10) + 120;
y0 = sy * (100 + tl + 10) + 140;
switch (i / 25) {
case -2: tft.drawCentreString("0", x0, y0 - 12, 2); break;
case -1: tft.drawCentreString("7.5", x0, y0 - 9, 2); break;
case 0: tft.drawCentreString("15", x0, y0 - 6, 2); break;
case 1: tft.drawCentreString("22.5", x0, y0 - 9, 2); break;
case 2: tft.drawCentreString("30", x0, y0 - 12, 2); break;
}
}
// Now draw the arc of the scale
sx = cos((i + 5 - 90) * 0.0174532925);
sy = sin((i + 5 - 90) * 0.0174532925);
x0 = sx * 100 + 120;
y0 = sy * 100 + 140;
// Draw scale arc, don't draw the last part
if (i < 50) tft.drawLine(x0, y0, x1, y1, TFT_BLACK);
}
tft.drawString("KM/h", 5 + 230 - 40, 119 - 20, 2); // Units at bottom right
tft.drawCentreString("KM/h", 120, 70, 4); // Comment out to avoid font 4
tft.drawRect(5, 3, 230, 119, TFT_BLACK); // Draw bezel line
}
void VuMeter::redraw(float value)
{
tft.setTextColor(TFT_BLACK, TFT_WHITE);
char buf[8]; dtostrf(value, 4, 0, buf);
tft.drawRightString(buf, 50, 119 - 25, 4);
if (value < -3) value = -3; // Limit value to emulate needle end stops
if (value > 33) value = 33;
float sdeg = map(value, -3, 33, -150, -30); // Map value to angle
// Calcualte tip of needle coords
float sx = cos(sdeg * 0.0174532925);
float sy = sin(sdeg * 0.0174532925);
// Calculate x delta of needle start (does not start at pivot point)
float tx = tan((sdeg + 90) * 0.0174532925);
// Erase old needle image
tft.drawLine(120 + 20 * ltx - 1, 140 - 20, osx - 1, osy, TFT_WHITE);
tft.drawLine(120 + 20 * ltx, 140 - 20, osx, osy, TFT_WHITE);
tft.drawLine(120 + 20 * ltx + 1, 140 - 20, osx + 1, osy, TFT_WHITE);
// Re-plot text under needle
tft.setTextColor(TFT_BLACK);
tft.drawCentreString("KM/h", 120, 70, 4); // // Comment out to avoid font 4
// Store new needle end coords for next erase
ltx = tx;
osx = sx * 98 + 120;
osy = sy * 98 + 140;
// Draw the needle in the new postion, magenta makes needle a bit bolder
// draws 3 lines to thicken needle
tft.drawLine(120 + 20 * ltx - 1, 140 - 20, osx - 1, osy, TFT_RED);
tft.drawLine(120 + 20 * ltx, 140 - 20, osx, osy, TFT_MAGENTA);
tft.drawLine(120 + 20 * ltx + 1, 140 - 20, osx + 1, osy, TFT_RED);
}
}