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Changes to let updates happen less frequently:

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* _ContrainPoint() was broken as it could never change the point it was supposed
  to contrain.
* MouseDown() no longer sends a notification message automatically (only if it
  changed something)
* MouseMoved() and synchronous MouseDown() will now only send modification messages
  if something actually changed (not for every mouse update).
* After key presses, the invokation message is only sent when the value changed.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19697 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2007-01-04 14:25:13 +00:00
parent efe7244436
commit fb29f5b0fb
2 changed files with 27 additions and 9 deletions
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2
headers/os/interface/Slider.h
View File

@ -148,7 +148,7 @@ class BSlider : public BControl {
float _MinPosition() const;
float _MaxPosition() const;
bool _ConstrainPoint(BPoint point, BPoint compare) const;
bool _ConstrainPoint(BPoint& point, BPoint compare) const;
virtual void _ReservedSlider5();
virtual void _ReservedSlider6();

34
src/kits/interface/Slider.cpp
View File

@ -407,14 +407,20 @@ BSlider::KeyDown(const char *bytes, int32 numBytes)
switch (bytes[0]) {
case B_LEFT_ARROW:
case B_DOWN_ARROW: {
int32 oldValue = Value();
SetValue(Value() - KeyIncrementValue());
Invoke();
if (oldValue != Value())
Invoke();
break;
}
case B_RIGHT_ARROW:
case B_UP_ARROW: {
int32 oldValue = Value();
SetValue(Value() + KeyIncrementValue());
Invoke();
if (oldValue != Value())
Invoke();
break;
}
default:
@ -423,8 +429,13 @@ BSlider::KeyDown(const char *bytes, int32 numBytes)
}
/*!
Makes sure the \a point is within valid bounds.
Returns \c true if the relevant coordinate (depending on the orientation
of the slider) differs from \a comparePoint.
*/
bool
BSlider::_ConstrainPoint(BPoint point, BPoint comparePoint) const
BSlider::_ConstrainPoint(BPoint& point, BPoint comparePoint) const
{
if (fOrientation == B_HORIZONTAL) {
if (point.x != comparePoint.x) {
@ -465,7 +476,8 @@ BSlider::MouseDown(BPoint point)
_ConstrainPoint(point, fInitialLocation);
SetValue(ValueForPoint(point));
InvokeNotify(ModificationMessage(), B_CONTROL_MODIFIED);
if (_Location() != fInitialLocation)
InvokeNotify(ModificationMessage(), B_CONTROL_MODIFIED);
if (Window()->Flags() & B_ASYNCHRONOUS_CONTROLS) {
SetTracking(true);
@ -481,8 +493,11 @@ BSlider::MouseDown(BPoint point)
GetMouse(&point, &buttons, true);
if (_ConstrainPoint(point, prevPoint)) {
SetValue(ValueForPoint(point));
InvokeNotify(ModificationMessage(), B_CONTROL_MODIFIED);
int32 value = ValueForPoint(point);
if (value != Value()) {
SetValue(value);
InvokeNotify(ModificationMessage(), B_CONTROL_MODIFIED);
}
}
}
if (_Location() != fInitialLocation)
@ -509,8 +524,11 @@ BSlider::MouseMoved(BPoint point, uint32 transit, const BMessage *message)
{
if (IsTracking()) {
if (_ConstrainPoint(point, _Location())) {
SetValue(ValueForPoint(point));
InvokeNotify(ModificationMessage(), B_CONTROL_MODIFIED);
int32 value = ValueForPoint(point);
if (value != Value()) {
SetValue(value);
InvokeNotify(ModificationMessage(), B_CONTROL_MODIFIED);
}
}
} else
BControl::MouseMoved(point, transit, message);