Remarks
Occurs when a mouse action happens over the waveform scroller.
For further details about methods of the Waveform scroller refer to the WaveformScroller object.
For a tutorial about the use of Waveform scrollers refer to the How to scroll the sound's waveform during playback tutorial.
Syntax
[Visual Basic]
WaveScrollerMouseNotification (
ByVal hWndWaveformScroller as OLE_HANDLE,
ByVal nAction as enumMouseActions,
ByVal nFlags as Long,
ByVal xPos as Long,
ByVal yPos as Long,
ByVal nPressPosInPix as Long,
ByVal nPressPosInMs as Long
)
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[C++]
void WaveScrollerMouseNotification (
OLE_HANDLE hWndWaveformScroller,
long nNewPosInMs,
short nAction,
long nFlags,
long xPos,
long yPos,
long nPressPosInPix,
long nPressPosInMs
);
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Parameter
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Description
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hWndWaveformScroller
|
Handle of the waveform scroller control returned by a previous call to the WaveformScroller.Create method
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nAction
|
Mouse action type.
Supported values are the following:
Mnemonic constant
|
Value
|
Meaning
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MOUSE_ACTION_LEFT_DOWN
|
0
|
Left mouse button down
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MOUSE_ACTION_LEFT_UP
|
1
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Left mouse button up
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MOUSE_ACTION_LEFT_CLICK
|
2
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Left mouse button click
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MOUSE_ACTION_LEFT_DBLCLICK
|
3
|
Left mouse button double click
|
MOUSE_ACTION_RIGHT_DOWN
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4
|
Right mouse button down
|
MOUSE_ACTION_RIGHT_UP
|
5
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Right mouse button up
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MOUSE_ACTION_RIGHT_CLICK
|
6
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Right mouse button click
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MOUSE_ACTION_RIGHT_DBLCLICK
|
7
|
Right mouse button double click
|
MOUSE_ACTION_MOVE
|
8
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Mouse move. This notification is not generated when the waveform analyzer is empty.
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MOUSE_ACTION_MIDDLE_DOWN
|
9
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Middle mouse button down
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MOUSE_ACTION_MIDDLE_UP
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10
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Middle mouse button up
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MOUSE_ACTION_MIDDLE_CLICK
|
11
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Middle mouse button click
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MOUSE_ACTION_MIDDLE_DBLCLICK
|
12
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Middle mouse button double click
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MOUSE_ACTION_WHEEL_SCROLL_BACK
|
13
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Mouse wheel scroll back
|
MOUSE_ACTION_WHEEL_SCROLL_FORWARD
|
14
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Mouse wheel scroll forward
|
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nFlags
|
Can be a combination of the following values:
Value
|
Meaning
|
1
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Set if left mouse button is down (defined as MK_LBUTTON inside the Windows SDK)
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2
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Set if right mouse button is down (defined as MK_RBUTTON inside the Windows SDK)
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4
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Set if keyboard's SHIFT key is down (defined as MK_SHIFT inside the Windows SDK)
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8
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Set if keyboard's CTRL key is down (defined as MK_CONTROL inside the Windows SDK)
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16 (hex 10)
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Set if middle mouse button is down (defined as MK_MBUTTON inside the Windows SDK)
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xPos
|
Horizontal position, expressed in pixels respect to the waveform's client area, where the mouse generated the notification
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yPos
|
Vertical position, expressed in pixels respect to the waveform's client area, where the mouse generated the notification
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nPressPosInPix
|
Number representing the position expressed in pixels where the mouse button was pressed. If the mouse action should have been performed outside of the waveform's area, this parameter would be set to -1.
It's important to note that this parameter doesn't represent the horizontal position on the waveform's visible area (for this you can refer to the xPos parameter) but to the horizontal position in pixels calculated respect to the bitmap representation of the total waveform's width in pixels at the current horizontal zoom factor.
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nPressPosInMs
|
Number representing the position expressed in milliseconds where the mouse button was pressed. If the mouse action should have been performed outside of the waveform's area, this parameter would be set to -1.
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