107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
#include "UIBar.h"
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#include "UIComponent.h"
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#include "UIDrawing.h"
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UIBar::UIBar() {};
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UIBar::UIBar(Arduino_GFX *d, UIDimensions dims, UIDecorations decor,
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char *title)
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: UIElement(d, dims, decor, title) {}
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void UIBar::Update(char *v) {
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unsigned long time = millis();
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if ((time - this->lastUpdate) <= this->refreshRate) {
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return;
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}
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// Conver the string to an integer
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uint32_t newVal = atoi(v);
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if (this->value == newVal) {
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// If the value hasn't changed we do not need to re-render
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return;
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}
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this->DrawBar(&this->value, &newVal);
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this->value = newVal;
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}
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void UIBar::DrawBar(uint32_t *oldValue, uint32_t *newValue) {
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// We can help identifying cur RPM visually by using different
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// colors on the bar, for example, at a given distance of the ideal shift
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// we can change the color gradually
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// If the new value is larger than the old one
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// we just paint a new rectangle
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// If the new value is smaller than the old one
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// we have to delete a chunk of the old rectangle
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int16_t startX = 0;
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int16_t len = 0;
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uint16_t colour = WHITE;
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if (*newValue > *oldValue) { // Increment the bar
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int32_t newV =
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(*newValue * (uint32_t)(this->dims.width - 4)) / (this->range * 1000);
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int32_t oldV =
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(this->value * (uint32_t)(this->dims.width - 4)) / (this->range * 1000);
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startX = oldV;
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len = newV - oldV;
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} else { // Decrement the bar
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int32_t newV =
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(*newValue * (uint32_t)(this->dims.width - 4)) / (this->range * 1000);
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int32_t oldV =
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(this->value * (uint32_t)(this->dims.width - 4)) / (this->range * 1000);
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startX = newV;
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len = oldV - newV;
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colour = BLACK;
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}
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this->display->fillRect(this->dims.x + 2 + startX, this->dims.y + 2, len,
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this->dims.height - 4, colour);
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this->value = *newValue;
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}
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void UIBar::renderBlank() {
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this->display->setCursor(this->dims.x, this->dims.y);
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this->display->print("!RANGE");
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}
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void UIBar::Box() {
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// If the range was not set, we cannot draw our ruler
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if (this->range <= 0) {
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this->renderBlank();
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return;
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}
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// Bounding box for the bar
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this->display->drawRect(this->dims.x, this->dims.y, this->dims.width,
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this->dims.height, RED);
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// Now we can draw the scale (this should be easy to modify if needed)
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// dividirs will be the range of the tach - 8 = 8000rpm
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// Calculate step size as a float for accurate positioning
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float step = (float)this->dims.width / this->range;
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for (int k = 0; k <= this->range; k++) {
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uint16_t x = round(k * step) + this->dims.x;
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// To ensure it doesn't go beyond the bounding box
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if (x >= this->dims.x + this->dims.width) {
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x = this->dims.x + this->dims.width - 1;
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}
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this->display->setTextColor(RED);
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this->display->drawFastVLine(x, this->dims.y + this->dims.height, 7, RED);
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char legend[5];
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sprintf(legend, "%d", k);
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this->display->setCursor(x - (CHR_WIDTH(this->decor.textSize) / 2),
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this->dims.y + this->dims.height + 7 + 2);
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this->display->setTextColor(WHITE);
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this->display->setTextSize(this->decor.textSize);
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this->display->print(legend);
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}
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}
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