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나는 smartgwt를 사용하여 이미지를 축소하고 축소하는 코드를 작성했습니다. 하지만 문제가 포함 캔버스 그것을 해결하는 방법을 스크롤 막대의 표시 할 수 없다는 것입니다 그scrollabe Img smartgwt
public class ImageViewer implements EntryPoint {
static int counter = 0;
int widths[] = new int[5];
int hights[] = new int[5];
int originalW=0;
int originalH=0;
public void onModuleLoad() {
// -------tool bar ---------------
ToolStrip toolbar = new ToolStrip();
toolbar.setWidth("100%");
toolbar.addFill();
ToolStripButton max = new ToolStripButton(" + ");
ToolStripButton min = new ToolStripButton(" - ");
ToolStripButton auto = new ToolStripButton(" auto ");
ToolStripButton print = new ToolStripButton(" print ");
ToolStripButton save = new ToolStripButton(" save ");
toolbar.addButton(max);
toolbar.addButton(min);
toolbar.addButton(auto);
toolbar.addSeparator();
toolbar.addButton(print);
toolbar.addButton(save);
// -------------------------------
HLayout hLayout = new HLayout();
VLayout vLayout = new VLayout();
SectionStack sectionStack = new SectionStack();
sectionStack.setWidth("100%");
sectionStack.setHeight("100%");
sectionStack.setVisibilityMode(VisibilityMode.MULTIPLE);
sectionStack.setAnimateSections(true);
sectionStack.setOverflow(Overflow.HIDDEN);
SectionStackSection summarySection = new SectionStackSection();
summarySection.setTitle("Image Viewer");
summarySection.setExpanded(true);
summarySection.setItems(hLayout);
sectionStack.setSections(summarySection);
TreeGrid treeGrid = new TreeGrid();
treeGrid.setWidth("20%");
treeGrid.setShowConnectors(true);
treeGrid.setShowResizeBar(true);
final Canvas imgCanvas = new Canvas();
imgCanvas.setShowEdges(true);
final Img img = new Img("http://www.google.com/intl/en_ALL/images/srpr/logo1w.png");
img.setParentElement(imgCanvas);
img.draw();
img.setImageType(ImageStyle.CENTER);
originalW = img.getWidth();
originalH = img.getHeight();
widths[0] = originalW;
hights[0] = originalH;
widths[1] = widths[0]*2;
hights[1] = hights[0]*2;
widths[2] = widths[1]*2;
hights[2] = hights[1]*2;
widths[3] = widths[2]*2;
hights[3] = hights[2]*2;
widths[4] = widths[3]*2;
hights[4] = hights[3]*2;
hLayout.setMembers(treeGrid, vLayout);
vLayout.setMembers(toolbar,imgCanvas);
RootPanel.get("imgPanel").add(sectionStack);
//-------------- handelers --------------------
max.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
img.setImageType(ImageStyle.STRETCH);
if (counter <4){
counter++;
img.animateRect(0, 0, widths[counter] , hights[counter]);
}
}
});
min.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
img.setImageType(ImageStyle.STRETCH);
if (counter > 0){
counter--;
img.animateRect(0, 0, widths[counter], hights[counter]);
}
}
});
auto.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
img.setImageType(ImageStyle.CENTER);
img.animateRect(0, 0, originalW, originalH);
imgCanvas.adjustForContent(true);
}
});
//---------------------------------------------
}
}