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preparing TimePanel.setMinMax for frequent calls, doing change detection and updating only upon actual change

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This commit is contained in:
Axel Uhl committed 2012-02-20 05:44:04 +01:00
1 parent d6803bb881
commit 9f01f05f95
1 file changed
+42 -11
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java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/TimePanel.java
+42 -11
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@@ -32,6 +32,21 @@ import com.sap.sailing.gwt.ui.shared.controls.slider.SliderBar;
public class TimePanel<T extends TimePanelSettings> extends FormPanel implements Component<T>, TimeListener, PlayStateListener, RequiresResize {
protected final Timer timer;
/**
* The start time point of the time interval visualized by this time panel. May be <code>null</code> if not yet initialized.
*
* @see #setMinMax(Date, Date)
*/
private Date min;
/**
* The end time point of the time interval visualized by this time panel. May be <code>null</code> if not yet initialized.
*
* @see #setMinMax(Date, Date)
*/
private Date max;
private final IntegerBox playSpeedBox;
private final Label timeDelayLabel;
private final Label timeLabel;
@@ -277,20 +292,36 @@ public class TimePanel<T extends TimePanelSettings> extends FormPanel implements
}
}
/**
* @param min must not be <code>null</code>
* @param max must not be <code>null</code>
*/
public void setMinMax(Date min, Date max) {
assert min != null && max != null;
boolean changed = false;
int numTicks = 8;
sliderBar.setMinValue(new Double(min.getTime()));
sliderBar.setMaxValue(new Double(max.getTime()));
if (sliderBar.getCurrentValue() == null) {
sliderBar.setCurrentValue(new Double(min.getTime()));
if (!max.equals(this.max)) {
changed = true;
this.max = max;
sliderBar.setMaxValue(new Double(max.getTime()));
}
sliderBar.setNumTickLabels(numTicks);
sliderBar.setNumTicks(numTicks);
int numSteps = sliderBar.getElement().getClientWidth();
if (numSteps > 0) {
sliderBar.setStepSize(numSteps);
} else {
sliderBar.setStepSize(1000);
if (!min.equals(this.min)) {
changed = true;
this.min = min;
sliderBar.setMinValue(new Double(min.getTime()));
if (sliderBar.getCurrentValue() == null) {
sliderBar.setCurrentValue(new Double(min.getTime()));
}
}
if (changed) {
sliderBar.setNumTickLabels(numTicks);
sliderBar.setNumTicks(numTicks);
int numSteps = sliderBar.getElement().getClientWidth();
if (numSteps > 0) {
sliderBar.setStepSize(numSteps);
} else {
sliderBar.setStepSize(1000);
}
}
}