From 20e359a1b9ac774acc084cd4e284d23ad64dd9af Mon Sep 17 00:00:00 2001
From: Florian Wetzel <florian.wetzel@go-e.com>
Date: Tue, 25 Feb 2025 14:49:01 +0100
Subject: [PATCH] Add ability to change the color

---
 src/widgets/progressbar.cpp | 18 ++++++++++++++++++
 src/widgets/progressbar.h   |  6 ++++--
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/widgets/progressbar.cpp b/src/widgets/progressbar.cpp
index d2fca4f..bdb8ee6 100644
--- a/src/widgets/progressbar.cpp
+++ b/src/widgets/progressbar.cpp
@@ -31,4 +31,22 @@ void ProgressBar::redraw(TftInterface &tft, int value)
 
     m_lastValue = value;
 }
+
+void ProgressBar::changeColor(TftInterface &tft, const uint32_t color, const uint32_t backgroundColor)
+{
+    if (color != m_color)
+    {
+        // redraw already drawn area in new color
+        tft.fillRect(m_x+1, m_y+1, m_lastValue-m_x-1, m_height-2, color);
+        m_color = color;
+    }
+
+    if (backgroundColor != m_backgroundColor)
+    {
+        // redraw background in new color
+        tft.fillRect(m_x+1, m_y+1, m_width-2, m_height-2, backgroundColor);
+        m_backgroundColor = backgroundColor;
+    }
+}
+
 } // namespace espgui
diff --git a/src/widgets/progressbar.h b/src/widgets/progressbar.h
index 009046e..aa02960 100644
--- a/src/widgets/progressbar.h
+++ b/src/widgets/progressbar.h
@@ -21,6 +21,8 @@ public:
     void start(TftInterface &tft);
     void redraw(TftInterface &tft, int value);
 
+    void changeColor(TftInterface &tft, const uint32_t color = TFT_YELLOW, const uint32_t backgroundColor = TFT_BLACK);
+
 private:
     const int m_x;
     const int m_y;
@@ -28,8 +30,8 @@ private:
     const int m_height;
     const int m_min;
     const int m_max;
-    const uint32_t m_color;
-    const uint32_t m_backgroundColor;
+    uint32_t m_color;
+    uint32_t m_backgroundColor;
 
     int m_lastValue{};
 };