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Simplfy diagram drawing code

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This commit is contained in:
Thomas Basler 2023-12-28 00:10:40 +01:00
parent 5b39c1803e
commit 34983471de
1 changed files with 25 additions and 18 deletions
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43
src/Display_Graphic_Diagram.cpp
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@ -62,20 +62,28 @@ void DisplayGraphicDiagramClass::updatePeriod()
void DisplayGraphicDiagramClass::redraw(uint8_t screenSaverOffsetX)
{
const uint8_t graphPosX = DIAG_POSX + ((screenSaverOffsetX > 3) ? 1 : 0); // screenSaverOffsetX expected to be in range 0..6
// screenSaverOffsetX expected to be in range 0..6
const uint8_t graphPosX = DIAG_POSX + ((screenSaverOffsetX > 3) ? 1 : 0);
const uint8_t graphPosY = DIAG_POSY + ((screenSaverOffsetX > 3) ? 1 : 0);
const uint8_t horizontal_line_y = graphPosY + CHART_HEIGHT - 1;
const uint8_t arrow_size = 2;
// draw diagram axis
_display->drawVLine(graphPosX, graphPosY, CHART_HEIGHT);
_display->drawHLine(graphPosX, graphPosY + CHART_HEIGHT - 1, CHART_WIDTH);
_display->drawHLine(graphPosX, horizontal_line_y, CHART_WIDTH);
_display->drawLine(graphPosX + 1, graphPosY + 1, graphPosX + 2, graphPosY + 2); // UP-arrow
_display->drawLine(graphPosX - 2, graphPosY + 2, graphPosX - 1, graphPosY + 1); // UP-arrow
_display->drawLine(graphPosX + CHART_WIDTH - 3, graphPosY + CHART_HEIGHT - 3, graphPosX + CHART_WIDTH - 2, graphPosY + CHART_HEIGHT - 2); // LEFT-arrow
_display->drawLine(graphPosX + CHART_WIDTH - 3, graphPosY + CHART_HEIGHT + 1, graphPosX + CHART_WIDTH - 2, graphPosY + CHART_HEIGHT); // LEFT-arrow
// UP-arrow
_display->drawLine(graphPosX, graphPosY, graphPosX + arrow_size, graphPosY + arrow_size);
_display->drawLine(graphPosX, graphPosY, graphPosX - arrow_size, graphPosY + arrow_size);
// LEFT-arrow
_display->drawLine(graphPosX + CHART_WIDTH - 1, horizontal_line_y, graphPosX + CHART_WIDTH - 1 - arrow_size, horizontal_line_y - arrow_size);
_display->drawLine(graphPosX + CHART_WIDTH - 1, horizontal_line_y, graphPosX + CHART_WIDTH - 1 - arrow_size, horizontal_line_y + arrow_size);
// draw AC value
_display->setFont(u8g2_font_tom_thumb_4x6_mr); // 4 pixels per char
// 4 pixels per char
_display->setFont(u8g2_font_tom_thumb_4x6_mr);
char fmtText[7];
const float maxWatts = *std::max_element(_graphValues.begin(), _graphValues.end());
if (maxWatts > 999) {
@ -84,25 +92,24 @@ void DisplayGraphicDiagramClass::redraw(uint8_t screenSaverOffsetX)
snprintf(fmtText, sizeof(fmtText), "%dW", static_cast<uint16_t>(maxWatts));
}
const uint8_t textLength = strlen(fmtText);
const uint8_t space_and_arrow_pixels = 2;
_display->drawStr(graphPosX - space_and_arrow_pixels - (textLength * 4), graphPosY + 5, fmtText);
_display->drawStr(graphPosX - arrow_size - textLength * 4, graphPosY + 5, fmtText);
// draw chart
const float scaleFactor = maxWatts / CHART_HEIGHT;
uint8_t axisTick = 1;
for (int i = 0; i < _graphValuesCount; i++) {
if (scaleFactor > 0) {
if (i == 0) {
_display->drawPixel(graphPosX + 1 + i, graphPosY + CHART_HEIGHT - ((_graphValues[i] / scaleFactor) + 0.5)); // + 0.5 to round mathematical
} else {
_display->drawLine(graphPosX + i, graphPosY + CHART_HEIGHT - ((_graphValues[i - 1] / scaleFactor) + 0.5), graphPosX + 1 + i, graphPosY + CHART_HEIGHT - ((_graphValues[i] / scaleFactor) + 0.5));
}
}
for (uint8_t i = 1; i < _graphValuesCount; i++) {
// draw one tick per hour to the x-axis
if (i * getSecondsPerDot() > (3600u * axisTick)) {
_display->drawPixel(graphPosX + 1 + i, graphPosY + CHART_HEIGHT);
axisTick++;
}
if (scaleFactor == 0) {
continue;
}
_display->drawLine(
graphPosX + i - 1, horizontal_line_y - std::max<int16_t>(0, _graphValues[i - 1] / scaleFactor - 0.5),
graphPosX + i, horizontal_line_y - std::max<int16_t>(0, _graphValues[i] / scaleFactor - 0.5));
}
}