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#134 Remove flickering in the console

v1.1.x
fixed
Erik Hänel
None
v1.1.0
Bug Fix
2017-02-15
2017-01-29
Erik Hänel
No

The console flickers while using backspace or scrolling although nothing was done.

Analysis:
The flickering results from the console being refreshed without any action, which has been processed. If the relevant actions (backspace and scroll) would return a boolean indicating the success of the action (meaning, if the action could be processed or not), then a refresh would only be needed, if this boolean returns to true.

Implementation:
The fix was implemented as proposed by the analysis. The flickering could be removed for a scroll action, while it is still present, if the backspace is used (and there's actually something, which can be deleted by a backspace). It won't flicker anymore, if there cursor is already at the beginning of the line.

Documentation:
Not needed - bug fix.

Tests:
Backspace and scrolling don't result in flickering any more. The other detected cases are done with #157.

Discussion

  • Erik Hänel

    Erik Hänel - 2017-01-29
    • status: open --> accepted
     

  • Erik Hänel

    Erik Hänel - 2017-01-29
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -1 +1,9 @@
 The console flickers while using backspace or scrolling although nothing was done.
+
+**Analysis:**
+
+**Implementation:**
+
+**Documentation:**
+
+**Tests:**
    • status: accepted --> analyzing
     

  • Erik Hänel

    Erik Hänel - 2017-01-31
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -1,6 +1,7 @@
 The console flickers while using backspace or scrolling although nothing was done.

 **Analysis:**
+The flickering results from the console being refreshed without any action, which has been processed. If the relevant actions (backspace and scroll) would return a boolean indicating the success of the action (meaning, if the action could be processed or not), then a refresh would only be needed, if this boolean returns to true.

 **Implementation:**
     

  • Erik Hänel

    Erik Hänel - 2017-01-31
    • status: analyzing --> implementing
     

  • Erik Hänel

    Erik Hänel - 2017-02-01
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -4,7 +4,9 @@
 The flickering results from the console being refreshed without any action, which has been processed. If the relevant actions (backspace and scroll) would return a boolean indicating the success of the action (meaning, if the action could be processed or not), then a refresh would only be needed, if this boolean returns to true.

 **Implementation:**
+The fix was implemented as proposed by the analysis. The flickering could be removed for a scroll action, while it is still present, if the backspace is used (and there's actually something, which can be deleted by a backspace). It won't flicker anymore, if there cursor is already at the beginning of the line.

 **Documentation:**
+Not needed - bug fix.

 **Tests:**
    • status: implementing --> testing
     

  • Erik Hänel

    Erik Hänel - 2017-02-15
    • Description has changed:

    Diff:

    --- old
+++ new
@@ -10,3 +10,4 @@
 Not needed - bug fix.

 **Tests:**
+Backspace and scrolling don't result in flickering any more. The other detected cases are done with #157.
     

  • Erik Hänel

    Erik Hänel - 2017-02-15
    • status: testing --> fixed
     

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