Improved vertical alignment of text in FbTk::TextButton

The old formula for vertical align text inside FbTk::TextButton ('height/2 +
font_ascent/2 - 1') produced not always good looking results, escpecially
when different fonts are involved (eg, ClockTool and WorkspaceName have
different fonts and font-sizes).

'(height - font_ascent) / 2 - 1' produces better results.

Additional changes:

* added ASCII-Art to document the involved entities when calculating the
  baseline
* rewritten tests/testFont.cc to accept multiples texts and multiple
  fonts
* removed some internal parts of FbTk::Font from the public interface

1 files changed, 0 insertions, 2 deletions

diff --git a/src/Toolbar.cc b/src/Toolbar.cc
index 1c22440..f46b9e9 100644
--- a/src/Toolbar.cc
+++ b/src/Toolbar.cc
@@ -170,14 +170,12 @@ Toolbar::Frame::Frame(FbTk::EventHandler &evh, int screen_num):
 {
 
     FbTk::EventManager &evm = *FbTk::EventManager::instance();
-    // add windows to eventmanager
     evm.add(evh, window);
 
 }
 
 Toolbar::Frame::~Frame() {
     FbTk::EventManager &evm = *FbTk::EventManager::instance();
-    // remove windows from eventmanager
     evm.remove(window);
 }