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--- xojo:fader:start [2021/04/01 17:16]
mz angelegt
+++ xojo:fader:start [2021/04/06 09:30] (aktuell)
mz [Fader unit]
@@ Zeile 1: / Zeile 1: @@
-====== Fader module for Audio and Lighting purposes ======
+====== Fader unit ======
-/* {{tag> }} */
+<fs x-large>particulary for Lighting and Audio purposes</fs>
-{{indexmenu>.#3|ns tsort hsort nsort}}
+<WRAP round download 70%>
+**{{:xojo:fader:fader_demo.zip|Fader Demo Project (xojo-binary-project)}}**\\
+**{{ :xojo:fader:fader.zip |Fader class (xojo-binary-code)}}**\\
+**{{ :xojo:fader:levelbox.zip |LevelBox class (xojo-binary-code)}}**\\
+**{{ :xojo:objectnotifier:object_notification.zip |Object Notification: interfaces and class  (xojo-binary-code folder)}}**
+</WRAP>
+{{  :xojo:fader:fader_demo_2021-04-01.png|}}
+===== Overview =====
+Core element is the **[[xojo:fader:levelbox|LevelBox Class]]** which does all the mathematical stuff.\\
+Especially it holds the current **fader value**, available in different units (Absolute, Percent, DMX, dB).\\
+Further the **scaling** is selectable (linear, logarithmic) and any changes of the value will be propagated by means of the implemented
+**[[xojo:objectnotifier:start|ObjectNotifier]]** interface.
+The **[[xojo:fader:faderclass|Fader class]]** is a subclass of **Canvas** and therefore acts as a user-defined control.\\
+The faders **//Level//** property is an instance of LevelBox. Scaling and colors are adjustable in the inspector.
+===== Usage =====
+Simply import the **[[xojo:fader:faderclass|Fader class]]** in your project.\\
+It will appear then in the Library and can be used like any other control.
+Additionally you have to import the **[[xojo:fader:levelbox|LevelBox Class]]** because //Fader// depends on it.\\
+And now import the **[[xojo:objectnotifier:start|ObjectNotifier]]** folder, because //LevelBox// implements it.
+===== Operation =====
+==== Mouse ====
+  * **Click**: select the fader (set focus for keyboard operation)
+  * **Wheel**: fade up and down (in steps of 1 % or 1 dB, depending on scale setting)
+  * **Shift + Wheel**: fine mode. Steps of 1 DMX or 0.5 dB respectively
+  * **Ctrl + Wheel**: coarse mode. Steps of 5 % or 3 dB
+  * **Click** with **Shift** or **Ctrl** pressed: Fader jumps to mouse pointer and **can be dragged**
+The right mouse button is not used here and left free for a context menu if desired.
+==== Keyboard ====
+For keyboard operation the Fader must have focus, either by clicking on it or by **Tab** key or (in the example Project) with **Alt + //faderNumber//**.
+But these are label-shortcuts programmed separately on the application window.
+^ ^^ lin ^ log ^
+| Digit 0 ... 9 | jump to | 0 % ... 90 % | 0 dB, -10 dB ... -90 dB |
+| Home | jump to full scale | 100 % | +10 dB |
+| End | jump to off | 0 % | -∞ dB |
+| Page Up | step up by | +10 % | +10 dB |
+| Page Down | step down by | -10 % | -10 dB |
+| + | step up by | +5 % | +3 dB |
+| - | step down by | -5 % | -3 dB |
+| Arrow keys<sup>1)</sup> | step | ±1 % | ±1 dB |
+| Shift + Arrow | fine mode | ±1 DMX | ±0.5 dB |
+| Ctrl + Arrow | coarse mode | ±3 % | ±3 dB |
+<sup>1)</sup>Arrow keys: up or right steps up, down or left steps down.
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