Class: Fox::FXBitmapView

Inherits:
FXScrollArea show all
Defined in:
rdoc-sources/FXBitmapView.rb,
lib/fox16/bitmapview.rb

Overview

The FXBitmapView widget displays a scrollable view of a bitmap.

Bitmap alignment styles

BITMAPVIEW_NORMAL:: Normal mode is centered BITMAPVIEW_CENTER_X:: Centered horizontally BITMAPVIEW_LEFT:: Left-aligned BITMAPVIEW_RIGHT:: Right-aligned BITMAPVIEW_CENTER_Y:: Centered vertically BITMAPVIEW_TOP:: Top-aligned BITMAPVIEW_BOTTOM:: Bottom-aligned

Events

SEL_RIGHTBUTTONPRESS:: sent when the right mouse button goes down; the message data is an FXEvent instance. SEL_RIGHTBUTTONRELEASE:: sent when the right mouse button goes up; the message data is an FXEvent instance.

Constant Summary collapse

BITMAPVIEW_NORMAL =

Bitmap alignment styles

0
BITMAPVIEW_CENTER_X =

Normal mode is centered

0
BITMAPVIEW_LEFT =

Centered horizontally

0x00100000
BITMAPVIEW_RIGHT =

Left-aligned

0x00200000
BITMAPVIEW_CENTER_Y =

Right-aligned

0,         # Centered vertically
BITMAPVIEW_TOP       = 0x00400000
BITMAPVIEW_BOTTOM =

Top-aligned

0x00800000

Instance Attribute Summary collapse

Attributes inherited from FXScrollArea

#contentHeight, #contentWidth, #horizontalScrollBar, #scrollStyle, #verticalScrollBar, #viewportHeight, #viewportWidth, #xPosition, #yPosition

Attributes inherited from FXWindow

#accelTable, #backColor, #defaultCursor, #dragCursor, #first, #focus, #key, #last, #layoutHints, #next, #numChildren, #owner, #parent, #prev, #root, #selector, #shell, #target, #x, #y

Attributes inherited from FXDrawable

#height, #visual, #width

Attributes inherited from FXId

#app, #userData, #xid

Instance Method Summary collapse

Methods inherited from FXScrollArea

#horizontalScrollable?, #position, #scrollCorner, #setPosition, #verticalScrollable?

Methods inherited from FXComposite

#maxChildHeight, #maxChildWidth

Methods inherited from FXWindow

#acceptDrop, #acquireClipboard, #acquireSelection, #active?, #addHotKey, after?, #after?, before?, #before?, #beginDrag, #canFocus?, #changeFocus, #childAtIndex, #childOf?, #children, #clearDragRectangle, #clearShape, colorType, colorTypeName, commonAncestor, #composeContext, #composite?, #contains?, #containsChild?, #createComposeContext, #cursorPosition, #default?, #defaultHeight, #defaultWidth, deleteType, deleteTypeName, #destroy, #destroyComposeContext, #didAccept, #disable, #doesSaveUnder?, #dragging?, #dropDisable, #dropEnable, #dropEnabled?, #dropFinished, #dropTarget?, #each_child, #each_child_recursive, #enable, #enabled?, #endDrag, #forceRefresh, #getChildAt, #getDNDData, #getHeightForWidth, #getWidthForHeight, #grab, #grabKeyboard, #grabbed?, #grabbedKeyboard?, #handleDrag, #hasClipboard?, #hasFocus?, #hasSelection?, #height, #height=, #hide, imageType, #inFocusChain?, #indexOfChild, #initial?, #inquireDNDAction, #inquireDNDTypes, #killFocus, #linkAfter, #linkBefore, #lower, #move, octetType, octetTypeName, #offeredDNDType?, #position, #raiseWindow, #recalc, #releaseClipboard, #releaseSelection, #remHotKey, #removeChild, #repaint, #reparent, #resize, #scroll, #setCursorPosition, #setDNDData, #setDefault, #setDragRectangle, #setFocus, #setInitial, #setShape, #shell?, #show, #shown?, stringType, textType, textTypeName, #tr, #translateCoordinatesFrom, #translateCoordinatesTo, #underCursor?, #ungrab, #ungrabKeyboard, #update, urilistType, urilistTypeName, utf16Type, utf16TypeName, utf8Type, utf8TypeName, #visible=, #width, #width=

Methods included from Responder2

#connect

Methods inherited from FXDrawable

#resize

Methods inherited from FXId

#created?, #destroy, #runOnUiThread

Methods inherited from FXObject

#bind, #handle, #load, #save, subclasses

Constructor Details

#initialize(p, bmp = nil, tgt = nil, sel = 0, opts = 0, x = 0, y = 0, w = 0, h = 0) ⇒ FXBitmapView

Return an initialized FXBitmapView instance.



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# File 'rdoc-sources/FXBitmapView.rb', line 40

def initialize(p, bmp=nil, target=nil, selector=0, opts=0, x=0, y=0, width=0, height=0) # :yields: theBitmapView
end

Instance Attribute Details

#alignment ⇒ Object

Return the current alignment for the bitmap inside the FXBitmapView.



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# File 'rdoc-sources/FXBitmapView.rb', line 35

def alignment
  @alignment
end

#bitmap ⇒ Object

Return a reference to the bitmap (an FXBitmap instance) for this FXBitmapView, or nil if no bitmap has been set.



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# File 'rdoc-sources/FXBitmapView.rb', line 26

def bitmap
  @bitmap
end

#offColor ⇒ Object

Return the color used for the “off” bits in the bitmap.



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# File 'rdoc-sources/FXBitmapView.rb', line 32

def offColor
  @offColor
end

#onColor ⇒ Object

Return the color used for the “on” bits in the bitmap.



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# File 'rdoc-sources/FXBitmapView.rb', line 29

def onColor
  @onColor
end

Instance Method Details

#canFocus ⇒ Object 



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# File 'lib/fox16/bitmapview.rb', line 56

def canFocus
  true
end

#create ⇒ Object 



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# File 'lib/fox16/bitmapview.rb', line 46

def create
  super
  bitmap.create unless bitmap.nil?
end

#detach ⇒ Object 



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# File 'lib/fox16/bitmapview.rb', line 51

def detach
  super
  bitmap.detach unless bitmap.nil?
end

#getContentHeight ⇒ Object 



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# File 'lib/fox16/bitmapview.rb', line 64

def getContentHeight
  bitmap.nil? ? 1 : bitmap.height
end

#getContentWidth ⇒ Object 



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# File 'lib/fox16/bitmapview.rb', line 60

def getContentWidth
  bitmap.nil? ? 1 : bitmap.width
end

#layout ⇒ Object 



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# File 'lib/fox16/bitmapview.rb', line 68

def layout
  super
  update
  self.flags &= ~FLAG_DIRTY
end

#onMotion(sender, sel, ev) ⇒ Object

Handle real or simulated mouse motion



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# File 'lib/fox16/bitmapview.rb', line 154

def onMotion(sender, sel, ev)
  if (flags & FLAG_SCROLLING) != 0
    setPosition(ev.win_x - @grabx, ev.win_y - @graby)
    return 1
  end
  return 0
end

#onPaint(sender, sel, event) ⇒ Object

Handle expose (paint) event



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# File 'lib/fox16/bitmapview.rb', line 75

def onPaint(sender, sel, event)
  FXDCWindow.new(self, event) do |dc|
    unless bitmap.nil?
      ww = bitmap.width
      hh = bitmap.height
      xx = pos_x
      yy = pos_y
      if ww < viewport_w
        if (options & BITMAPVIEW_LEFT) != 0
          xx = 0
        elsif (options & BITMAPVIEW_RIGHT) != 0
          xx = viewport_w - ww
        else
          xx = (viewport_w - ww)/2
        end
      end
      if hh < viewport_h
        if (options & BITMAPVIEW_TOP) != 0
          yy = 0
        elsif (options & BITMAPVIEW_BOTTOM) != 0
          yy = viewport_h - hh
        else
          yy = (viewport_h - hh)/2
        end
      end
      dc.foreground = onColor
      dc.background = offColor
      dc.drawBitmap(bitmap, xx, yy)
      dc.foreground = backColor
      xl = xx; xr = xx + ww
      yt = yy; yb = yy + hh
      xl = 0 if (xl < 0)
      xr = viewport_w if (xr > viewport_w)
      yt = 0 if (yt < 0)
      yb = viewport_h if (yb > viewport_h)
      dc.fillRectangle(0, 0, xr, yt)
      dc.fillRectangle(0, yt, xl, viewport_h - yt)
      dc.fillRectangle(xr, 0, viewport_w - xr, yb)
      dc.fillRectangle(xl, yb, viewport_w - xl, viewport_h - yb)
    else
      dc.foreground = backColor
      dc.fillRectangle(0, 0, width, height)
    end
  end
end

#onRightBtnPress(sender, sel, ev) ⇒ Object

Handle right mouse button press



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# File 'lib/fox16/bitmapview.rb', line 122

def onRightBtnPress(sender, sel, ev)
  self.flags &= ~FLAG_TIP
  handle(self, Fox.FXSEL(SEL_FOCUS_SELF, 0), ev)
  if enabled?
    grab
    if target && target.handle(self, Fox.FXSEL(SEL_RIGHTBUTTONPRESS, message), ev) != 0
      return 1
    end
    self.flags &= ~FLAG_UPDATE
    self.flags |= FLAG_PRESSED|FLAG_SCROLLING
    @grabx = ev.win_x - pos_x
    @graby = ev.win_y - pos_y
    return 1
  end
  return 0
end

#onRightBtnRelease(sender, sel, ev) ⇒ Object

Handle right mouse button release



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# File 'lib/fox16/bitmapview.rb', line 140

def onRightBtnRelease(sender, sel, ev)
  if enabled?
    ungrab
    self.flags &= ~(FLAG_PRESSED|FLAG_SCROLLING)
    self.flags |= FLAG_UPDATE
    if target && target.handle(self, Fox.FXSEL(SEL_RIGHTBUTTONPRESS, message), ev) != 0
      return 1
    end
    return 1
  end
  return 0
end