swtskin.java

这是一个基于java编写的torrent的P2P源码

		final String[] sDirections = {
			"top",
			"bottom",
			"left",
			"right"
		};

		// Because layout data is cached, we can't just set the data's properties
		// We need to create a brand new FormData.

		Object data = controlToLayout.getLayoutData();
		if (data != null && !(data instanceof FormData)) {
			return;
		}
		FormData oldFormData = (FormData) controlToLayout.getLayoutData();
		if (oldFormData == null) {
			oldFormData = new FormData();
		}

		FormData newFormData = new FormData(oldFormData.width, oldFormData.height);

		String templateID = properties.getStringValue(sConfigID
				+ ".attach.template");
		if (templateID == null) {
			//templateID = skinObject.getSkinObjectID();
		}

		for (int i = 0; i < sDirections.length; i++) {
			Control control = null;
			int offset = 0;
			int percent = 0;
			String sAlign = null;
			int align = SWT.DEFAULT;

			// grab any defaults from existing attachment
			FormAttachment attachment;
			switch (i) {
				case 0:
					attachment = oldFormData.top;
					break;

				case 1:
					attachment = oldFormData.bottom;
					break;

				case 2:
					attachment = oldFormData.left;
					break;

				case 3:
					attachment = oldFormData.right;
					break;

				default:
					attachment = null;
			}

			if (attachment != null) {
				control = attachment.control;
				offset = attachment.offset;
				align = attachment.alignment;
				// XXX Assumed: Denominator is 100
				percent = attachment.numerator;
			}

			// parse skin config

			String suffix = ".attach." + sDirections[i];
			String prefix = sConfigID;
			String[] sParams;

			sParams = properties.getStringArray(sConfigID + suffix);
			if (sParams == null && templateID != null) {
				sParams = properties.getStringArray(templateID + suffix);
				prefix = templateID;
			}

			if (sParams == null) {
				if (attachment != null) {
					if (control == null) {
						attachment = new FormAttachment(percent, offset);
					} else {
						attachment = new FormAttachment(control, offset, align);
					}
				}

			} else if (sParams.length == 0
					|| (sParams.length == 1 && sParams[0].length() == 0)) {
				attachment = null;
			} else {

				if (sParams[0].length() > 0 && Character.isDigit(sParams[0].charAt(0))) {
					// Percent, Offset
					try {
						percent = Integer.parseInt(sParams[0]);
					} catch (Exception e) {
					}

					if (sParams.length > 1) {
						try {
							offset = Integer.parseInt(sParams[1]);
						} catch (Exception e) {
						}
					}

					attachment = new FormAttachment(percent, offset);

				} else {
					// Object, Offset, Alignment
					String sWidget = sParams[0];

					SWTSkinObject configSkinObject = getSkinObjectByID(sWidget);
					int iNextPos;
					if (configSkinObject != null) {
						control = configSkinObject.getControl();

						iNextPos = 1;
					} else {
						iNextPos = 0;

						if (sWidget.length() != 0) {
							System.err.println("ERROR: Trying to attach " + sDirections[i]
									+ " of widget '" + skinObject + "' to non-existant widget '"
									+ sWidget + "'.  Attachment Parameters: "
									+ properties.getStringValue(prefix + suffix));
						}
					}

					for (int j = iNextPos; j < sParams.length; j++) {
						if (sParams[j].length() > 0) {
							char c = sParams[j].charAt(0);
							if (Character.isDigit(c) || c == '-') {
								try {
									offset = Integer.parseInt(sParams[j]);
								} catch (Exception e) {
								}
							} else {
								sAlign = sParams[j];
							}
						}
					}

					if (sAlign != null) {
						align = SWTSkinUtils.getAlignment(sAlign, align);
					}

					attachment = new FormAttachment(control, offset, align);
				}
			}

			if (controlToLayout.getData("DEBUG") != null && attachment != null) {
				if (controlToLayout instanceof Group) {
					Group group = (Group) controlToLayout;
					String sValue = properties.getStringValue(prefix + suffix);
					String sText = group.getText() + "; "
							+ sDirections[i].substring(0, 1) + "="
							+ (sValue == null ? "(def)" : sValue);
					if (sText.length() < 20) {
						group.setText(sText);
					}
					group.setToolTipText(sText);
				}
			}

			if (DEBUGLAYOUT) {
				System.out.println("Attach: " + sConfigID + suffix + ": "
						+ properties.getStringValue(prefix + suffix) + "/" + attachment);
			}

			// create new attachment
			switch (i) {
				case 0:
					newFormData.top = attachment;
					break;

				case 1:
					newFormData.bottom = attachment;
					break;

				case 2:
					newFormData.left = attachment;
					break;

				case 3:
					newFormData.right = attachment;
					break;
			}

		}

		if (Constants.isWindows && (controlToLayout instanceof Browser) && false) {
			if (newFormData.top != null) {
				newFormData.top.offset -= 2;
			}
			if (newFormData.right != null) {
				newFormData.right.offset += 2;
			}
			if (newFormData.left != null) {
				newFormData.left.offset -= 2;
			}
			if (newFormData.bottom != null) {
				newFormData.bottom.offset += 2;
			}
		}

		newFormData.height = properties.getIntValue(sConfigID + ".height",
				newFormData.height);
		newFormData.width = properties.getIntValue(sConfigID + ".width",
				newFormData.width);
		controlToLayout.setLayoutData(newFormData);
	}

	private SWTSkinObject createContainer(SWTSkinProperties properties,
			String sID, final String sConfigID, SWTSkinObject parentSkinObject,
			boolean bForceCreate, boolean bPropogate, SWTSkinObject intoSkinObject) {
		String[] sItems = properties.getStringArray(sConfigID + ".widgets");
		if (sItems == null && !bForceCreate) {
			return null;
		}

		if (DEBUGLAYOUT) {
			System.out.println("createContainer: " + sID + ";"
					+ properties.getStringValue(sConfigID + ".widgets"));
		}

		SWTSkinObject skinObject = getSkinObjectByID(sID, parentSkinObject);

		if (skinObject == null) {
			if (intoSkinObject == null) {
				skinObject = new SWTSkinObjectContainer(this, properties, sID,
						sConfigID, parentSkinObject);
				addToControlMap(skinObject);
			} else {
				skinObject = intoSkinObject;
			}
		} else {
			if (!(skinObject instanceof SWTSkinObjectContainer)) {
				return skinObject;
			}
		}

		if (!bPropogate) {
			bPropogate = properties.getIntValue(sConfigID + ".propogate", 0) == 1;
		}

		if (!bPropogate && (parentSkinObject instanceof SWTSkinObjectContainer)) {
			bPropogate = ((SWTSkinObjectContainer) parentSkinObject).getPropogation();
		}
		if (bPropogate) {
			((SWTSkinObjectContainer) skinObject).setPropogation(true);
		}

		if (sItems != null) {
			String[] paramValues = null;
			if (properties instanceof SWTSkinPropertiesParam) {
				paramValues = ((SWTSkinPropertiesParam) properties).getParamValues();
			}
			// Cloning is only for one level.  Children get the original properties
			// object
			if (properties instanceof SWTSkinPropertiesClone) {
				properties = ((SWTSkinPropertiesClone) properties).getOriginalProperties();
			}

			// Propogate any parameter values.
			// XXX This could get ugly, we should could the # of 
			//     SWTSkinPropertiesParam to determine if this needs optimizing
			//     ie. if a top container has paramValues, every child will get a new
			//         object.  How would this affect memory/performace?
			if (paramValues != null) {
				properties = new SWTSkinPropertiesParamImpl(properties, paramValues);
			}

			for (int i = 0; i < sItems.length; i++) {
				String sItemID = sItems[i];
				linkIDtoParent(properties, sItemID, sItemID, skinObject, false, true);
			}
		}

		if (bLayoutComplete) {
			attachControl(skinObject);
		}

		return skinObject;
	}

	private SWTSkinObject createSash(SWTSkinProperties properties, String sID,
			String sConfigID, SWTSkinObject parentSkinObject, final boolean bVertical) {
		int style = bVertical ? SWT.VERTICAL : SWT.HORIZONTAL;

		final String[] sItems = properties.getStringArray(sConfigID + ".widgets");

		SWTSkinObject skinObject;

		Composite createOn;
		if (parentSkinObject == null) {
			createOn = shell;
		} else {
			createOn = (Composite) parentSkinObject.getControl();
		}

		if (sItems == null) {
			// No widgets, so it's a sash
			Sash sash = new Sash(createOn, style);
			skinObject = new SWTSkinObjectBasic(this, properties, sash, sID,
					sConfigID, "sash", parentSkinObject);
			addToControlMap(skinObject);

			sash.setBackground(sash.getDisplay().getSystemColor(SWT.COLOR_RED));

			sash.addListener(SWT.Selection, new Listener() {
				public void handleEvent(Event e) {
					Sash sash = (Sash) e.widget;
					final boolean FASTDRAG = true;

					if (FASTDRAG && e.detail == SWT.DRAG) {
						return;
					}

					Rectangle parentArea = sash.getParent().getClientArea();

					FormData formData = (FormData) sash.getLayoutData();
					formData.left = new FormAttachment(e.x * 100 / parentArea.width);
					sash.getParent().layout();
				}
			});
		} else {
			// Widgets exist, so use a SashForm to split them
			final SashForm sashForm = new SashForm(createOn, style);
			skinObject = new SWTSkinObjectContainer(this, properties, sashForm, sID,
					sConfigID, "sash", parentSkinObject);
			addToControlMap(skinObject);

			int iSashWidth = properties.getIntValue(sConfigID + ".sash.width", -1);

			if (iSashWidth > 0) {
				sashForm.SASH_WIDTH = iSashWidth;
			}

			for (int i = 0; i < sItems.length; i++) {
				String sChildID = sItems[i];
				linkIDtoParent(properties, sChildID, sChildID, skinObject, false, true);
			}
		}

		if (bLayoutComplete) {
			attachControl(skinObject);
		}

		return skinObject;
	}

	private SWTSkinObject createMySash(SWTSkinProperties properties,
			final String sID, String sConfigID, String[] typeParams,
			SWTSkinObject parentSkinObject, final boolean bVertical) {

		SWTSkinObject skinObject = new SWTSkinObjectSash(this, properties, sID,
				sConfigID, typeParams, parentSkinObject, bVertical);
		addToControlMap(skinObject);

		if (bLayoutComplete) {
			attachControl(skinObject);
		}

		return skinObject;
	}

	/**
	 * Create a tab using a template.
	 * <p>
	 * (objectid).view.template.(sTemplateKey)=(Reference to Template skin object)
	 * 
	 * @param sID ID to give the new tab
	 * @param sTemplateKey Template Key to read to get the tab's template skin object
	 * @param tabHolder Where to read the template key from
	 * 
	 * @return The new tab, or null if tab could not be created
	 */
	public SWTSkinObjectTab createTab(String sID, String sTemplateKey,
			SWTSkinObject tabHolder) {
		String sTemplateID = SWTSkinTabSet.getTemplateID(this, tabHolder,
				sTemplateKey);

		if (sTemplateID == null) {
			return null;
		}

		SWTSkinObject skinObject = linkIDtoParent(skinProperties, sID, sTemplateID,
				tabHolder, true, true);

		//		SWTSkinObjectTab skinObject = _createTab(skinProperties, sID, sTemplateID,
		//				tabHolder);
		if (bLayoutComplete && skinObject != null) {
			((Composite) skinObject.getControl()).getParent().layout(true);
		}
		if (skinObject instanceof SWTSkinObjectTab) {
			return (SWTSkinObjectTab) skinObject;
		}

		System.err.println(skinObject + " not a SWTSkinObjectTab! Template: "
				+ sTemplateID);
		return null;
	}

	/**
	 * @param configID
	 */
	private SWTSkinObjectTab _createTab(SWTSkinProperties properties, String sID,
			String sConfigID, SWTSkinObject parentSkinObject) {
		//System.out.println("createTab " + sID + ", " + sConfigID + ", " + sParentID);

		SWTSkinObjectTab skinObjectTab = new SWTSkinObjectTab(this, properties,
				sID, sConfigID, parentSkinObject);
		createContainer(properties, sID, sConfigID, parentSkinObject, true, true,
				skinObjectTab);

		addToControlMap(skinObjectTab);

		String sTabSet = properties.getStringValue(sConfigID + ".tabset", "default");

		SWTSkinTabSet tabset = (SWTSkinTabSet) mapTabSetToControls.get(sTabSet);
		if (tabset == null) {
			tabset = new SWTSkinTabSet(this, sTabSet);
			mapTabSetToControls.put(sTabSet, tabset);
			if (DEBUGLAYOUT) {
				System.out.println("New TabSet: " + sTabSet);
			}