diff options
Diffstat (limited to 'src/window.cpp')
| -rw-r--r-- | src/window.cpp | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/window.cpp b/src/window.cpp index 9ce9f105d..70fee8754 100644 --- a/src/window.cpp +++ b/src/window.cpp @@ -140,6 +140,42 @@ bool EditBoxInGlobalFocus() } /** + * Set focus within this window to the given widget. The function however doesn't change which window has focus. + * @param widget_index Index of the widget in the window to set the focus to. + * @return Focus has changed. + */ +bool Window::SetFocusedWidget(byte widget_index) +{ + if (this->widget != NULL) { + /* Do nothing if widget_index is already focused, or if it wasn't a valid widget. */ + if (widget_index >= this->widget_count || this->widget + widget_index == this->focused_widget) return false; + + if (this->focused_widget != NULL) { + /* Repaint the widget that lost focus. A focused edit box may else leave the caret on the screen. */ + this->InvalidateWidget(this->focused_widget - this->widget); + } + this->focused_widget = &this->widget[widget_index]; + return true; + } + + if (this->nested_array != NULL) { + /* Do nothing if widget_index is already focused, or if it wasn't a valid widget. */ + if (widget_index >= this->nested_array_size) return false; + + assert(this->nested_array[widget_index] != NULL); // Setting focus to a non-existing widget is a bad idea. + if (this->nested_focus != NULL) { + if (this->nested_array[widget_index] == this->nested_focus) return false; + + /* Repaint the widget that lost focus. A focused edit box may else leave the caret on the screen. */ + this->nested_focus->Invalidate(this); + } + this->nested_focus = this->nested_array[widget_index]; + return true; + } + NOT_REACHED(); +} + +/** * Sets the enabled/disabled status of a list of widgets. * By default, widgets are enabled. * On certain conditions, they have to be disabled. |