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Implement getTextWidth for display classes

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- Added getTextWidth method to DisplayDriver interface
- Implemented getTextWidth in all display classes
- Updated examples to use getTextWidth directly
This commit is contained in:
JQ
2025-05-04 18:17:18 -07:00
parent e442e94e3d
commit 678f36a57b
10 changed files with 32 additions and 8 deletions
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2
examples/companion_radio/UITask.cpp
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@@ -144,7 +144,7 @@ void UITask::renderCurrScreen() {
// version info
_display->setColor(DisplayDriver::LIGHT);
_display->setTextSize(1);
int textWidth = strlen(_version_info) * 5; // Assuming each character is 5 pixels wide
uint16_t textWidth = _display->getTextWidth(_version_info);
_display->setCursor((_display->width() - textWidth) / 2, 22);
_display->print(_version_info);
} else { // home screen

6
examples/simple_repeater/UITask.cpp
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@@ -51,14 +51,14 @@ void UITask::renderCurrScreen() {
// version info
_display->setColor(DisplayDriver::LIGHT);
_display->setTextSize(1);
int versionWidth = strlen(_version_info) * 6;
uint16_t versionWidth = _display->getTextWidth(_version_info);
_display->setCursor((_display->width() - versionWidth) / 2, 22);
_display->print(_version_info);
// node type
const char* node_type = "< Repeater >";
int nodeTypeWidth = strlen(node_type) * 6;
_display->setCursor((_display->width() - nodeTypeWidth) / 2, 35);
uint16_t typeWidth = _display->getTextWidth(node_type);
_display->setCursor((_display->width() - typeWidth) / 2, 35);
_display->print(node_type);
} else { // home screen
// node name

8
examples/simple_room_server/UITask.cpp
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@@ -51,14 +51,14 @@ void UITask::renderCurrScreen() {
// version info
_display->setColor(DisplayDriver::LIGHT);
_display->setTextSize(1);
int versionWidth = strlen(_version_info) * 6;
uint16_t versionWidth = _display->getTextWidth(_version_info);
_display->setCursor((_display->width() - versionWidth) / 2, 22);
_display->print(_version_info);
// node type
const char* node_type = "< Room Server >";
int nodeTypeWidth = strlen(node_type) * 6;
_display->setCursor((_display->width() - nodeTypeWidth) / 2, 35);
const char* node_type = "< Repeater >";
uint16_t typeWidth = _display->getTextWidth(node_type);
_display->setCursor((_display->width() - typeWidth) / 2, 35);
_display->print(node_type);
} else { // home screen
// node name

1
src/helpers/ui/DisplayDriver.h
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@@ -24,5 +24,6 @@ public:
virtual void fillRect(int x, int y, int w, int h) = 0;
virtual void drawRect(int x, int y, int w, int h) = 0;
virtual void drawXbm(int x, int y, const uint8_t* bits, int w, int h) = 0;
virtual uint16_t getTextWidth(const char* str) = 0;
virtual void endFrame() = 0;
};

7
src/helpers/ui/GxEPDDisplay.cpp
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@@ -94,6 +94,13 @@ void GxEPDDisplay::drawXbm(int x, int y, const uint8_t* bits, int w, int h) {
display.drawBitmap(x*1.5, (y*1.5) + 10, bits, w, h, GxEPD_BLACK);
}
uint16_t GxEPDDisplay::getTextWidth(const char* str) {
int16_t x1, y1;
uint16_t w, h;
display.getTextBounds(str, 0, 0, &x1, &y1, &w, &h);
return w;
}
void GxEPDDisplay::endFrame() {
display.display(true);
}

1
src/helpers/ui/GxEPDDisplay.h
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@@ -47,5 +47,6 @@ public:
void fillRect(int x, int y, int w, int h) override;
void drawRect(int x, int y, int w, int h) override;
void drawXbm(int x, int y, const uint8_t* bits, int w, int h) override;
uint16_t getTextWidth(const char* str) override;
void endFrame() override;
};

7
src/helpers/ui/SSD1306Display.cpp
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@@ -62,6 +62,13 @@ void SSD1306Display::drawXbm(int x, int y, const uint8_t* bits, int w, int h) {
display.drawBitmap(x, y, bits, w, h, SSD1306_WHITE);
}
uint16_t SSD1306Display::getTextWidth(const char* str) {
int16_t x1, y1;
uint16_t w, h;
display.getTextBounds(str, 0, 0, &x1, &y1, &w, &h);
return w;
}
void SSD1306Display::endFrame() {
display.display();
}

1
src/helpers/ui/SSD1306Display.h
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@@ -36,5 +36,6 @@ public:
void fillRect(int x, int y, int w, int h) override;
void drawRect(int x, int y, int w, int h) override;
void drawXbm(int x, int y, const uint8_t* bits, int w, int h) override;
uint16_t getTextWidth(const char* str) override;
void endFrame() override;
};

5
src/helpers/ui/ST7789Display.cpp
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@@ -44,6 +44,7 @@ void ST7789Display::startFrame(Color bkg) {
}
void ST7789Display::setTextSize(int sz) {
_textSize = sz; // Store the text size
switch(sz) {
case 1 :
display.setFont(ArialMT_Plain_10);
@@ -107,6 +108,10 @@ void ST7789Display::drawXbm(int x, int y, const uint8_t* bits, int w, int h) {
display.drawBitmap(x+X_OFFSET, y, w, h, bits);
}
uint16_t ST7789Display::getTextWidth(const char* str) {
return display.getStringWidth(str);
}
void ST7789Display::endFrame() {
display.display();
}

2
src/helpers/ui/ST7789Display.h
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@@ -11,6 +11,7 @@ class ST7789Display : public DisplayDriver {
bool _isOn;
uint16_t _color;
int _x=0, _y=0;
int _textSize=1; // Track the current text size
bool i2c_probe(TwoWire& wire, uint8_t addr);
public:
@@ -31,5 +32,6 @@ public:
void fillRect(int x, int y, int w, int h) override;
void drawRect(int x, int y, int w, int h) override;
void drawXbm(int x, int y, const uint8_t* bits, int w, int h) override;
uint16_t getTextWidth(const char* str) override;
void endFrame() override;
};