/*
Copyright (C) 2004-2012 GanttProject Team
This file is part of GanttProject, an opensource project management tool.
GanttProject is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GanttProject is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GanttProject. If not, see <http://www.gnu.org/licenses/>.
*/
package biz.ganttproject.core.chart.scene;
import biz.ganttproject.core.chart.canvas.Canvas;
import biz.ganttproject.core.chart.canvas.Canvas.TextGroup;
import biz.ganttproject.core.chart.canvas.TextMetrics;
import biz.ganttproject.core.chart.canvas.TextSelector;
import biz.ganttproject.core.chart.grid.Offset;
import biz.ganttproject.core.chart.grid.OffsetList;
import biz.ganttproject.core.chart.text.TimeFormatter;
import biz.ganttproject.core.chart.text.TimeUnitText;
import biz.ganttproject.core.chart.text.TimeUnitText.Position;
import biz.ganttproject.core.time.TimeUnit;
import java.awt.*;
import java.util.Date;
import java.util.List;
/**
* Renders chart timeline.
*/
public class TimelineSceneBuilder extends AbstractSceneBuilder {
private Canvas myTimelineContainer;
private final InputApi myInputApi;
private final BottomUnitSceneBuilder myBottomUnitLineRenderer;
public static interface InputApi {
int getViewportWidth();
int getTopLineHeight();
int getTimelineHeight();
Color getTimelineBackgroundColor();
Color getTimelineBorderColor();
Date getViewportStartDate();
OffsetList getTopUnitOffsets();
OffsetList getBottomUnitOffsets();
TimeFormatter getFormatter(TimeUnit timeUnit, TimeUnitText.Position position);
}
public TimelineSceneBuilder(InputApi inputApi) {
myInputApi = inputApi;
getCanvas().newLayer();
getCanvas().newLayer();
getCanvas().newLayer();
getCanvas().newLayer();
myTimelineContainer = getCanvas().newLayer();
myBottomUnitLineRenderer = new BottomUnitSceneBuilder(
myTimelineContainer, new BottomUnitSceneBuilder.InputApi() {
@Override
public int getTopLineHeight() {
return myInputApi.getTopLineHeight();
}
@Override
public OffsetList getBottomUnitOffsets() {
return myInputApi.getBottomUnitOffsets();
}
@Override
public TimeFormatter getFormatter(TimeUnit offsetUnit, Position position) {
return myInputApi.getFormatter(offsetUnit, position);
}
});
}
public Canvas getTimelineContainer() {
return myTimelineContainer;
}
@Override
public void reset(int sceneHeight) {
super.reset(sceneHeight);
myBottomUnitLineRenderer.reset(getHeight());
}
/**
* Draws the timeline box
*/
private void renderUnderlay() {
int sizex = myInputApi.getViewportWidth();
final int spanningHeaderHeight = myInputApi.getTopLineHeight();
final int headerHeight = myInputApi.getTimelineHeight();
Canvas container = myTimelineContainer;
Canvas.Rectangle headerRectangle = container.createRectangle(0, 0, sizex, headerHeight);
headerRectangle.setStyle("timeline.area");
//headerRectangle.setBackgroundColor(myInputApi.getTimelineBackgroundColor());
Canvas.Line timeunitHeaderBorder = container.createLine(0, spanningHeaderHeight,
sizex - 1, spanningHeaderHeight);
timeunitHeaderBorder.setStyle("timeline.lineSplitter");
//timeunitHeaderBorder.setForegroundColor(myInputApi.getTimelineBorderColor());
Canvas.Line bottomBorder = getTimelineContainer().createLine(0, headerHeight - 1, sizex - 2,
headerHeight - 1);
bottomBorder.setStyle("timeline.borderBottom");
}
@Override
public void build() {
renderUnderlay();
renderTopUnits();
renderBottomUnits();
}
/**
* Draws cells of the top line in the time line
*/
private void renderTopUnits() {
Date curDate = myInputApi.getViewportStartDate();
List<Offset> topOffsets = myInputApi.getTopUnitOffsets();
int curX = topOffsets.get(0).getOffsetPixels();
if (curX > 0) {
curX = 0;
}
final int topUnitHeight = myInputApi.getTopLineHeight();
TextGroup textGroup = myTimelineContainer.createTextGroup(0, 0, topUnitHeight, "timeline.top");
for (Offset nextOffset : topOffsets) {
if (curX >= 0) {
TimeUnitText[] texts = myInputApi.getFormatter(nextOffset.getOffsetUnit(), TimeUnitText.Position.UPPER_LINE)
.format(nextOffset.getOffsetUnit(), curDate);
final int maxWidth = nextOffset.getOffsetPixels() - curX - 5;
final TimeUnitText timeUnitText = texts[0];
textGroup.addText(curX + 5, 0, new TextSelector() {
@Override
public Canvas.Label[] getLabels(TextMetrics textLengthCalculator) {
return timeUnitText.getLabels(maxWidth, textLengthCalculator);
}
});
getTimelineContainer().createLine(curX, topUnitHeight - 10, curX, topUnitHeight);
}
curX = nextOffset.getOffsetPixels();
curDate = nextOffset.getOffsetEnd();
}
}
/**
* Draws cells of the bottom line in the time line
*/
private void renderBottomUnits() {
myBottomUnitLineRenderer.build();
}
}