Last modified 14 years ago Last modified on 02/03/2009 05:04:24 PM

Use of the mouse buttons

Each of the three mouse buttons has functionality in SHM. A trained user can perform the mouse operations very quickly and achieve high efficiency in working with the traces. Of course, the normal mouse functions of the X-Window interface are still valid in the program. The operations described here refer to activation of mouse buttons in one of the two display windows of SHM (see the display windows). It is strongly recommended to set the X-Window focus policy to Focus Follows Mouse (i.e. the window is made active which has the mouse pointer on it, without clicking onto the window). Otherwise the necessary clicks on the windows to make it active slow down the operations and may lead to unexpected results. In particular when working with shortcuts (almost all menu entries may be activated by hitting a key on the keyboard, see the characters to the right of the menu entries) this is important. A shortcut must go into an active main window.

Mouse button 1 (left)

This button is used for creating and deleting phases on the traces. A single click creates a new phase (with properties taken from the phase dialog box), a double click on an existing phase deletes it. Dragging (= click and move) an existing phase moves it from one time position to another. A trace accepts only one phase of the same name, if the phase already exists the phase marker remains black and unlabeled. Please check for phases lying out of the visible window. Phase clicks are allowed in any of the two display windows (main and zoom).

Mouse button 2 (middle)

Used for changing the style of the mouse cursor. When starting up the program the mouse cursor is nothing but the usual arrow. Clicking the middle mouse button adds a crosshair cursor. This is useful for comparing times between traces or check amplitude values (e.g. against the zero line shown at the right border of the display). Clicking again replaces the crosshair cursor by a waveform cursor. It takes the waveform from the zoom window and attaches it to the mouse cursor. With this option you may compare waveforms between traces or use it for picking of coherent phases by overlaying a reference trace to the other traces while picking the onset time. There is a set of waveform cursors following after this, the complete sequence of cursors is: none (no cursor), crosshair (crosshair cursor), waveform (waveform taken from zoom window), negwave (negative waveform from zoom), hilbert (hilbert transformation of waveform) and neghilb (negative hilbert transformation of waveform). After clicking the second mouse button 6 times you come back to no cursor. Sometimes it is not desirable to click so often to come back to the inital state, therefore you can set the maximum cursor form in the Setup menu. If you select e.g. crosshair there, then the middle mouse button toggles between no cursor and crosshair.

Mouse button 3 (right)

Selects time windows on traces (drag box). Clicking and dragging with this button on a trace in the main window opens and resizes a drag box. The selected waveform is displayed in enhanced resolution in the zoom window. If a drag box already exists a click with the right button lets the box center jump to the mouse position. Dragging an existing box scrolls a time window of constant length through the zoom window. If you click on the right border of an existing drag box, you may resize it. The use of the 3rd mouse button in the zoom window has no effect (up to SHM version 2.4f, see next paragraph). To set a time window defined by a drag window for all traces in the main display window use the command Set Time Window. Set Time Window and use the drag windows let you iterate to an appropriate time resolution.

Keyboard support

Since SHM version 2.4f the drag window may also be moved by the arrow keys. The up arrow key moves the drag window one trace up, similarly the down arrow key one trace down. The left and right arrows move the window by 20% of its width to the left or right, respectively. It is not possible to move the drag window out of display using the arrow keys. In addition a right mouse click within the zoom window moves the drag window one trace up (same function as the up arrow key). The advantage is that phase picking within the zoom window can be done much faster on a set of traces, because the mouse doesn't need to be moved between the zoom window and the main display window. Before the cursor keys can be used, the keysym value of the keys must be known to SHM. Please use the configuration parameters keysym_arrow_up, keysym_arrow_down, keysym_arrow_left and keysym_arrow_right. To find the keysym values set the debug level (parameter debug_level in the configuration file) to a value of 4 or higher. All keystrokes then will be protocoled in the shell window including the keysym value.

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