146 lines
3.1 KiB
C++
146 lines
3.1 KiB
C++
/*
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Tests string alignment
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Normally strings are printed relative to the top left corner but this can be
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changed with the setTextDatum() function. The library has #defines for:
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TL_DATUM = 0 = Top left
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TC_DATUM = 1 = Top centre
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TR_DATUM = 2 = Top right
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ML_DATUM = 3 = Middle left
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MC_DATUM = 4 = Middle centre
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MR_DATUM = 5 = Middle right
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BL_DATUM = 6 = Bottom left
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BC_DATUM = 7 = Bottom centre
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BR_DATUM = 8 = Bottom right
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L_BASELINE = 9 = Left character baseline (Line the 'A' character would sit on)
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C_BASELINE = 10 = Centre character baseline
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R_BASELINE = 11 = Right character baseline
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So you can use lines to position text like:
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tft.setTextDatum(BC_DATUM); // Set datum to bottom centre
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Needs fonts 2, 4, 6, 7 and 8
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#########################################################################
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###### DON'T FORGET TO UPDATE THE User_Setup.h FILE IN THE LIBRARY ######
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###### TO SELECT THE FONTS AND PINS YOU USE, SEE ABOVE ######
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#########################################################################
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*/
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#include <SPI.h>
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#include <TFT_eSPI.h> // Hardware-specific library
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TFT_eSPI tft = TFT_eSPI(); // Invoke custom library
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unsigned long drawTime = 0;
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int x, y; // Coordinates for drawing
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void setup(void) {
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Serial.begin(115200);
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tft.init();
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tft.setRotation(1);
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}
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void loop() {
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tft.fillScreen(TFT_BLACK);
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x = 160, y = 120;
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//Test all 9 datums 0-8 when plotting numbers
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for(byte datum = 0; datum < 9; datum++) {
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tft.setTextColor(TFT_WHITE, TFT_BLACK);
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tft.setTextDatum(datum);
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tft.drawNumber(42, x, y, 8);
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drawCross(x, y, TFT_RED);
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delay(1000);
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tft.fillScreen(TFT_BLACK);
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}
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//Test all 9 datums 0-8 when plotting a string
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// Datum works when text size is > 1
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for(byte datum = 0; datum < 9; datum++) {
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tft.setTextColor(TFT_WHITE, TFT_BLACK);
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tft.setTextDatum(datum);
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tft.setTextSize(2);
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tft.drawString("[xox]", x, y, 4);
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drawCross(x, y, TFT_GREEN);
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delay(1000);
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tft.fillScreen(TFT_BLACK);
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}
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tft.setTextSize(1);
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tft.setTextColor(TFT_BLUE, TFT_BLACK);
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// Here a special function is used that automatically centres the text
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// on the x, y coordinate
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tft.drawCentreString("69", x, y, 8);
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drawCross(x, y, TFT_CYAN);
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delay(1000);
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tft.fillScreen(TFT_BLACK);
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tft.setTextColor(TFT_RED, TFT_BLACK);
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tft.drawRightString("88",160,120,8);
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drawCross(x, y, TFT_RED);
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delay(1000);
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tft.fillScreen(TFT_BLACK);
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tft.setTextColor(TFT_WHITE, TFT_BLUE);
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//Test floating point drawing function
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tft.setTextDatum(BC_DATUM); // Set datum to bottom centre
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float test = 67.125;
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y = 180;
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tft.drawFloat(test, 4, x, y, 4);
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delay(1000);
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tft.fillScreen(TFT_BLACK);
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test = -0.555555;
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tft.drawFloat(test, 3, x, y, 4);
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delay(1000);
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tft.fillScreen(TFT_BLACK);
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test = 0.1;
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tft.drawFloat(test, 4, x, y, 4);
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delay(1000);
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tft.fillScreen(TFT_BLACK);
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test = 9999999;
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tft.drawFloat(test, 1, x, y, 4);
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drawCross(x, y, TFT_RED);
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delay(4000);
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}
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void drawCross(int x, int y, unsigned int color)
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{
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tft.drawLine(x - 5, y, x + 5, y, color);
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tft.drawLine(x, y - 5, x, y + 5, color);
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}
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