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Modify the SliderWidget value by using the mouse wheel

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svn-id: r35513
This commit is contained in:
Jordi Vilalta Prat 2008-12-23 23:36:38 +00:00
parent 51c22d9905
commit f75893a294
2 changed files with 22 additions and 3 deletions
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24
gui/widget.cpp
View File

@ -309,16 +309,34 @@ void SliderWidget::handleMouseUp(int x, int y, int button, int clickCount) {
_isDragging = false;
}
void SliderWidget::handleMouseWheel(int x, int y, int direction) {
if (isEnabled() && !_isDragging) {
// Increment or decrement one position
int newValue = posToValue(valueToPos(_value) - 1 * direction);
if (newValue < _valueMin)
newValue = _valueMin;
else if (newValue > _valueMax)
newValue = _valueMax;
if (newValue != _value) {
_value = newValue;
draw();
sendCommand(_cmd, _value); // FIXME - hack to allow for "live update" in sound dialog
}
}
}
void SliderWidget::drawWidget() {
g_gui.theme()->drawSlider(Common::Rect(_x, _y, _x+_w, _y+_h), valueToPos(_value), _state);
g_gui.theme()->drawSlider(Common::Rect(_x, _y, _x + _w, _y + _h), valueToPos(_value) + 1, _state);
}
int SliderWidget::valueToPos(int value) {
return (_w * (value - _valueMin) / (_valueMax - _valueMin));
return ((_w - 1) * (value - _valueMin + 1) / (_valueMax - _valueMin));
}
int SliderWidget::posToValue(int pos) {
return (pos) * (_valueMax - _valueMin) / _w + _valueMin;
return (pos) * (_valueMax - _valueMin) / (_w - 1) + _valueMin;
}
#pragma mark -

1
gui/widget.h
View File

@ -229,6 +229,7 @@ public:
void handleMouseUp(int x, int y, int button, int clickCount);
void handleMouseEntered(int button) { setFlags(WIDGET_HILITED); draw(); }
void handleMouseLeft(int button) { clearFlags(WIDGET_HILITED); draw(); }
void handleMouseWheel(int x, int y, int direction);
protected:
void drawWidget();