GWT CustomScrollPanel ejemplo

Question

Descubrí el CustomScrollPanel de GWT y cómo puede personalizar la barra de desplazamiento, pero no encuentro ningún ejemplo ni cómo configurarlo. ¿Hay algún ejemplo que muestre barras de desplazamiento personalizadas en uso?

Answer 1

Así es como personalizaría las barras de desplazamiento nativas, sin embargo, también podría desarrollar sus propias clases de barra de desplazamiento que implementan VerticalScrollbar y HorizontalScrollbar que son mucho más personalizables.

de recursos (estilo) definiciones:

public class ScrollResourcesContainer { 

    public interface ScrollPanelResources extends CustomScrollPanel.Resources 
    { 
     @Override 
     @Source({ "ScrollPanel.css", CustomScrollPanel.Style.DEFAULT_CSS }) 
     CustomScrollPanel.Style customScrollPanelStyle(); 
    } 

    public interface HorizontalResources extends NativeHorizontalScrollbar.Resources 
    { 
     @Override 
     @Source({ "HorizontalScrollbar.css", NativeHorizontalScrollbar.StyleTransparant.DEFAULT_CSS }) 
     NativeHorizontalScrollbar.Style nativeHorizontalScrollbarStyle(); 
    } 

    public interface VerticalResources extends NativeVerticalScrollbar.Resources 
    { 
     @Override 
     @Source({ "VerticalScrollbar.css", NativeVerticalScrollbar.StyleTransparant.DEFAULT_CSS }) 
     NativeVerticalScrollbar.Style nativeVerticalScrollbarStyle(); 
    } 
} 

uso a través de CustomScrollPanel:

CustomScrollPanel csp = new CustomScrollPanel((ScrollResourcesContainer.ScrollPanelResources) GWT.create(ScrollResourcesContainer.ScrollPanelResources.class)); 
    csp.setHorizontalScrollbar(new NativeHorizontalScrollbar((HorizontalResources) GWT.create(HorizontalResources.class)), 
    AbstractNativeScrollbar.getNativeScrollbarHeight()); 
    csp.setVerticalScrollbar(new NativeVerticalScrollbar((VerticalResources) GWT.create(VerticalResources.class)), 
    AbstractNativeScrollbar.getNativeScrollbarWidth()); 

Answer 2

Para obtener las barras de desplazamiento elegante de la barra de desplazamiento vertical en GWT, es necesario añadir siguiente código en el verticalScrollBar. css. que no funcionará para IE al igual que gmail.

/* Turn on a 16x16 scrollbar */ 
::-webkit-scrollbar { 
    width: 16px; 
    height: 16px; 
} 

/* Turn on single button up on top, and down on bottom */ 
::-webkit-scrollbar-button:start:decrement, 
::-webkit-scrollbar-button:end:increment { 
    display: block; 
} 

/* Turn off the down area up on top, and up area on bottom */ 
::-webkit-scrollbar-button:vertical:start:increment, 
::-webkit-scrollbar-button:vertical:end:decrement { 
    display: none; 
} 

/* Place The scroll down button at the bottom */ 
::-webkit-scrollbar-button:end:increment { 
    background-image: url(images/scroll_cntrl_dwn.png); 
} 

/* Place The scroll up button at the up */ 
::-webkit-scrollbar-button:start:decrement { 
    background-image: url(images/scroll_cntrl_up.png); 
} 

/* Top area above thumb and below up button */ 
::-webkit-scrollbar-track-piece:vertical:start { 
    background-image: url(images/scroll_gutter_top.png), url(images/scroll_gutter_mid.png); 
    background-repeat: no-repeat, repeat-y; 
} 

/* Bottom area below thumb and down button */ 
::-webkit-scrollbar-track-piece:vertical:end { 
    background-image: url(images/scroll_gutter_btm.png), url(images/scroll_gutter_mid.png); 
    background-repeat: no-repeat, repeat-y; 
    background-position: bottom left, 0 0; 
} 

/* The thumb itself */ 
::-webkit-scrollbar-thumb:vertical { 
    height: 56px; 
    -webkit-border-image: url(images/scroll_thumb.png) 8 0 8 0 stretch stretch; 
    border-width: 8 0 8 0; 
} 

Answer 3

Si alguien está interesado en tener el CSS tanto vertical como horizontal, esto es lo que estoy usando.

HorizontalScrollbar.css

/* *********** 
* SCROLLBAR * 
* ***********/ 
.nativeHorizontalScrollbar::-webkit-scrollbar 
{ 
    width: 10px; 
    height: 10px; 
} 

/* ************* 
* BUTTON AREA * 
* *************/ 
.nativeHorizontalScrollbar::-webkit-scrollbar-button:horizontal 
{ 
    background-color: transparent; 
} 

/* Increment scroll left/right button. */ 
.nativeHorizontalScrollbar::-webkit-scrollbar-button:start:decrement, 
.nativeHorizontalScrollbar::-webkit-scrollbar-button:end:increment 
{ 
    display: block; 

    width: 10px; 
    height: 8px; 

    background-repeat: no-repeat; 
    background-size: 10px 8px; 
} 

/* Increment scroll left button. */ 
.nativeHorizontalScrollbar::-webkit-scrollbar-button:start:decrement 
{ 
    background-image: url('images/scroll-left.png'); 
} 

/* Increment scroll right button. */ 
.nativeHorizontalScrollbar::-webkit-scrollbar-button:end:increment 
{ 
    background-image: url('images/scroll-right.png'); 
} 

/* Jump left/right buttons. */ 
.nativeHorizontalScrollbar::-webkit-scrollbar-button:horizontal:start:increment, 
.nativeHorizontalScrollbar::-webkit-scrollbar-button:horizontal:end:decrement 
{ 
    display: none; 
} 

/* ****************** 
* TRACKING SECTION * 
* ******************/ 
.nativeHorizontalScrollbar::-webkit-scrollbar-track:horizontal 
{ 
    background-color: transparent; 
} 

/* Area between the thumb and the left button. */ 
.nativeHorizontalScrollbar::-webkit-scrollbar-track-piece:horizontal:start 
{ 

} 

/* Area between the thumb and and right button. */ 
.nativeHorizontalScrollbar::-webkit-scrollbar-track-piece:horizontal:end 
{ 

} 

/* 
* The tracking area. 
* This is the area that the thumb travels along. 
*/ 
.nativeHorizontalScrollbar::-webkit-scrollbar-track-piece 
{ 
    background-color: rgba(255, 255, 255, 0.1); 
} 

/* The tracking piece. */ 
.nativeHorizontalScrollbar::-webkit-scrollbar-thumb:horizontal 
{ 
    height: 15px; 

    background-color: rgba(255, 255, 255, 0.75); 

    border: none; 
    -webkit-border-top-left-radius: 6px; 
    -webkit-border-top-right-radius: 6px; 
    -webkit-border-bottom-left-radius: 6px; 
    -webkit-border-bottom-right-radius: 6px; 
    -moz-border-radius-topleft: 6px; 
    -moz-border-radius-topright: 6px; 
    -moz-border-radius-bottomleft: 6px; 
    -moz-border-radius-bottomright: 6px; 
    border-top-left-radius: 6px; 
    border-top-right-radius: 6px; 
    border-bottom-left-radius: 6px; 
    border-bottom-right-radius: 6px; 
} 

/* ******** 
* CORNER * 
* ********/ 
.nativeHorizontalScrollbar::-webkit-scrollbar-corner:horizontal 
{ 
    background-color: transparent; 
} 

/* ********* 
* RESIZER * 
* *********/ 
.nativeHorizontalScrollbar::-webkit-scrollbar-resizer:horizontal 
{ 
    background-color: transparent; 
} 

VerticalScrollbar.css /* *********** * * SCROLLBAR * ********* **/

.nativeVerticalScrollbar::-webkit-scrollbar 
{ 
    width: 10px; 
    height: 10px; 
} 

/* ************* 
* BUTTON AREA * 
* *************/ 
.nativeVerticalScrollbar::-webkit-scrollbar-button:vertical 
{ 
    background-color: transparent; 
} 

/* Increment scroll up/down buttons. */ 
.nativeVerticalScrollbar::-webkit-scrollbar-button:start:decrement, 
.nativeVerticalScrollbar::-webkit-scrollbar-button:end:increment 
{ 
    display: block; 

    width: 10px; 
    height: 8px; 

    background-repeat: no-repeat; 
    background-size: 10px 8px; 
} 

/* Increment scroll up button. */ 
.nativeVerticalScrollbar::-webkit-scrollbar-button:start:decrement 
{ 
    background-image: url('images/scroll-up.png'); 
} 

/* Increment scroll down button. */ 
.nativeVerticalScrollbar::-webkit-scrollbar-button:end:increment 
{ 
    background-image: url('images/scroll-down.png'); 
} 

/* Jump up/down buttons. */ 
.nativeVerticalScrollbar::-webkit-scrollbar-button:vertical:start:increment, 
.nativeVerticalScrollbar::-webkit-scrollbar-button:vertical:end:decrement 
{ 
    display: none; 
} 

/* ****************** 
* TRACKING SECTION * 
* ******************/ 
.nativeVerticalScrollbar::-webkit-scrollbar-track:vertical 
{ 
    background-color: transparent; 
} 

/* Area between the thumb and the up button. */ 
.nativeVerticalScrollbar::-webkit-scrollbar-track-piece:vertical:start 
{ 

} 

/* Area between the thumb and and down button. */ 
.nativeVerticalScrollbar::-webkit-scrollbar-track-piece:vertical:end 
{ 

} 

/* 
* The tracking area. 
* This is the area that the thumb travels along. 
*/ 
.nativeVerticalScrollbar::-webkit-scrollbar-track-piece 
{ 
    background-color: rgba(255, 255, 255, 0.1); 
} 

/* The tracking piece. */ 
.nativeVerticalScrollbar::-webkit-scrollbar-thumb:vertical 
{ 
    height: 15px; 

    background-color: rgba(255, 255, 255, 0.75); 

    border: none; 
    -webkit-border-top-left-radius: 6px; 
    -webkit-border-top-right-radius: 6px; 
    -webkit-border-bottom-left-radius: 6px; 
    -webkit-border-bottom-right-radius: 6px; 
    -moz-border-radius-topleft: 6px; 
    -moz-border-radius-topright: 6px; 
    -moz-border-radius-bottomleft: 6px; 
    -moz-border-radius-bottomright: 6px; 
    border-top-left-radius: 6px; 
    border-top-right-radius: 6px; 
    border-bottom-left-radius: 6px; 
    border-bottom-right-radius: 6px; 
} 

/* ******** 
* CORNER * 
* ********/ 
.nativeVerticalScrollbar::-webkit-scrollbar-corner:vertical 
{ 
    background-color: transparent; 
} 

/* ********* 
* RESIZER * 
* *********/ 
.nativeVerticalScrollbar::-webkit-scrollbar-resizer:vertical 
{ 
    background-color: transparent; 
}