[Qt] keep scroll position in GUI console after changing font size

jonasschnelli · jonasschnelli · commit 56c9e66a6d7c · 2016-01-23T00:05:14.000+01:00
diff --git a/src/qt/forms/debugwindow.ui b/src/qt/forms/debugwindow.ui
@@ -480,7 +480,7 @@
             </size>
            </property>
            <property name="toolTip">
-            <string>Decrease Font Size</string>
+            <string>Decrease font size</string>
            </property>
            <property name="text">
             <string/>
@@ -512,7 +512,7 @@
             </size>
            </property>
            <property name="toolTip">
-            <string>Increase Font Size</string>
+            <string>Increase font size</string>
            </property>
            <property name="text">
             <string/>
diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
@@ -490,8 +490,10 @@ void RPCConsole::setFontSize(int newSize)
     settings.setValue(fontSizeSettingsKey, consoleFontSize);
 
     // clear console (reset icon sizes, default stylesheet) and re-add the content
+    float oldPosFactor = 1.0 / ui->messagesWidget->verticalScrollBar()->maximum() * ui->messagesWidget->verticalScrollBar()->value();
     clear();
     ui->messagesWidget->setHtml(str);
+    ui->messagesWidget->verticalScrollBar()->setValue(oldPosFactor * ui->messagesWidget->verticalScrollBar()->maximum());
 }
 
 void RPCConsole::clear()

Original file line number	Diff line number	Diff line change
`@@ -490,8 +490,10 @@ void RPCConsole::setFontSize(int newSize)`
`490`	`490`	`settings.setValue(fontSizeSettingsKey, consoleFontSize);`
`491`	`491`
`492`	`492`	`// clear console (reset icon sizes, default stylesheet) and re-add the content`
	`493`	`+ float oldPosFactor = 1.0 / ui->messagesWidget->verticalScrollBar()->maximum() * ui->messagesWidget->verticalScrollBar()->value();`
`493`	`494`	`clear();`
`494`	`495`	`ui->messagesWidget->setHtml(str);`
	`496`	`+ ui->messagesWidget->verticalScrollBar()->setValue(oldPosFactor * ui->messagesWidget->verticalScrollBar()->maximum());`
`495`	`497`	`}`
`496`	`498`
`497`	`499`	`void RPCConsole::clear()`