From 41e2b7286da7b097eff4f2fb5652a128bb8db8a8 Mon Sep 17 00:00:00 2001
From: Raphael Robatsch <raphael-git@tapesoftware.net>
Date: Fri, 22 Oct 2021 15:49:09 +0200
Subject: [PATCH] Configurable font

---
 src/bar.cpp    | 24 ++++++++++++++++--------
 src/bar.hpp    |  3 ++-
 src/config.hpp |  6 +++++-
 3 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/src/bar.cpp b/src/bar.cpp
index e3c1ce1..a9ff3b3 100644
--- a/src/bar.cpp
+++ b/src/bar.cpp
@@ -14,7 +14,16 @@ const zwlr_layer_surface_v1_listener Bar::_layerSurfaceListener = {
     }
 };
 
+static QFont getFont()
+{
+    QFont font {fontFamily, fontSizePt};
+    font.setBold(fontBold);
+    return font;
+}
+
 Bar::Bar(const wl_output *output)
+    : _font {getFont()}
+    , _fontMetrics {_font}
 {
     _surface = wl_compositor_create_surface(compositor);
     _layerSurface = zwlr_layer_shell_v1_get_layer_surface(wlrLayerShell,
@@ -23,6 +32,10 @@ Bar::Bar(const wl_output *output)
     auto anchor = topbar ? ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP : ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM;
     zwlr_layer_surface_v1_set_anchor(_layerSurface,
         anchor | ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT);
+
+    auto barSize = _fontMetrics.ascent() + _fontMetrics.descent() + paddingY * 2;
+    _textY = _fontMetrics.ascent() + paddingY;
+
     zwlr_layer_surface_v1_set_size(_layerSurface, 0, barSize);
     zwlr_layer_surface_v1_set_exclusive_zone(_layerSurface, barSize);
     wl_surface_commit(_surface);
@@ -56,15 +69,10 @@ void Bar::render()
     };
     auto painter = QPainter {&img};
     _painter = &painter;
-    auto font = painter.font();
-    font.setBold(true);
-    font.setPixelSize(18);
-    painter.setFont(font);
+    painter.setFont(_font);
 
     setColorScheme(colorActive);
     painter.fillRect(0, 0, img.width(), img.height(), painter.brush());
-    _fontMetrics.emplace(painter.font());
-    _textY = _fontMetrics->ascent() + paddingY;
     renderTags(painter);
     
     _painter = nullptr;
@@ -85,7 +93,7 @@ void Bar::renderTags(QPainter &painter)
     for (const auto &tag : _tags) {
         auto size = textWidth(tag.name) + paddingX*2;
         setColorScheme(tag.active ? colorActive : colorInactive);
-        painter.fillRect(x, 0, size, barSize, _painter->brush());
+        painter.fillRect(x, 0, size, _bufs->height, _painter->brush());
         painter.drawText(paddingX+x, _textY, tag.name);
         x += size;
     }
@@ -93,5 +101,5 @@ void Bar::renderTags(QPainter &painter)
 
 int Bar::textWidth(const QString &text)
 {
-    return _fontMetrics->size(Qt::TextSingleLine, text).width();
+    return _fontMetrics.size(Qt::TextSingleLine, text).width();
 }
diff --git a/src/bar.hpp b/src/bar.hpp
index 9afd9a5..b394c08 100644
--- a/src/bar.hpp
+++ b/src/bar.hpp
@@ -23,7 +23,8 @@ class Bar {
     wl_surface *_surface {nullptr};
     zwlr_layer_surface_v1 *_layerSurface {nullptr};
     QPainter *_painter {nullptr};
-    std::optional<QFontMetrics> _fontMetrics;
+    QFont _font;
+    QFontMetrics _fontMetrics;
     std::optional<ShmBuffer> _bufs;
     std::vector<Tag> _tags;
     int _textY;
diff --git a/src/config.hpp b/src/config.hpp
index 6ff53e1..a38ce87 100644
--- a/src/config.hpp
+++ b/src/config.hpp
@@ -4,10 +4,14 @@
 #pragma once
 #include "common.hpp"
 
-constexpr int barSize = 26;
 constexpr bool topbar = 1;
+
 constexpr int paddingX = 10;
 constexpr int paddingY = 3;
 
+constexpr const char *fontFamily = "Source Sans Pro";
+constexpr int fontSizePt = 12;
+constexpr bool fontBold = true;
+
 constexpr ColorScheme colorInactive = {QColor(255, 255, 255), QColor(0, 0, 0)};
 constexpr ColorScheme colorActive = {QColor(255, 255, 255), QColor(0, 0, 255)};