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commit 7d7457ff92ad7690ef2c310127d80549372fb70b Author: Jean Rene Dawin <hi...@gmx.de> Date: Wed Feb 22 15:20:10 2017 -0800 Wiki page knob_example changed with summary [] by Jean Rene Dawin --- pages/themes/knob_example.txt | 103 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 102 insertions(+), 1 deletion(-) diff --git a/pages/themes/knob_example.txt b/pages/themes/knob_example.txt index 6a46ce0..b7ed9f6 100644 --- a/pages/themes/knob_example.txt +++ b/pages/themes/knob_example.txt @@ -6,4 +6,105 @@ Here is an example for an edje theme which makes an Elementary slider widget loo It will look like this {{:themes:edje-knob.png?nolink}} and works by displaying one of 60 images, depending on how much you drag the knob (up and down). Each of the images corresponds to a different rotation of the knob. -The edc file for this theme will be described below. +The important parts of the edc file for this theme will be described below. +In the ''group'' block we define the name we will later use to load the theme from within a C program. +<code> +collections{ + group{ + name: "elm/slider/horizontal/knob"; + alias: "elm/slider/horizontal/default"; + min: 64 64; +</code> +Next we list the ''images'' we will be using +<code> + images{ + image: "0000.png" COMP; + image: "0001.png" COMP; + image: "0002.png" COMP + + //Similar for 0003.png to 0059.png. + + image: "0060.png" COMP; + image: "knobbg.png" COMP; + } +</code> +The ''script'' block contains global variables and functions. The function ''update_knob_state'' is used to load new images when the knob is turned. The variables are used to store the state of the knob. +<code> + script{ + public knob_pos; + public knob_ref; + public knob_last; + public knob_move; + public signal_from_dragger; + + + public update_knob_state(Float:frac){ + + new px, py, pw, ph; + get_geometry(PART:"knob", px, py, pw, ph); + new Float:step = ph/60; + if(frac > ph) { set_state(PART:"knob", "60", 0.0); return;} + if(frac <= 0) { set_state(PART:"knob", "default", 0.0); return;} + if(frac < step) { set_state(PART:"knob", "1", 0.0); return;} + if(frac < 2*step) { set_state(PART:"knob", "2", 0.0); return;} + + //Similar "if" statments for frac < 3*step to 59*step. + + if(frac < 60*step) { set_state(PART:"knob", "60", 0.0); return;} + + } + + public reset_dragger(){ + set_drag(PART:"dragger", 0.0, 0.0); + set_int(signal_from_dragger, 0); + } + } +</code> +The ''parts'' block contains the functional parts of the knob. +These are mostly geometric objects that may be moveable and/or visible. +They may also emit signals which will be important in the ''programs'' block below. +<code> + parts{ + part{ + name: "knobbase"; + scale: 1; + description{ + state: "default" 0.0; + min: 64 64; + image.normal: "knobbg.png"; + } + } +</code> +Each part has a one or more descriptions, which represent states of the part. +Here each state is associated with one image (position) of the knob. +<code> + part{ + name: "knob"; + mouse_events: 0; + scale: 1; + description{ + state: "default" 0.0; + min: 64 64; + rel.to: "knobbase"; + image.normal: "0000.png"; + } + description{ + state: "1" 0.0; + inherit: "default" 0.0; + image.normal: "0001.png"; + } + description{ + state: "2" 0.0; + inherit: "default" 0.0; + image.normal: "0002.png"; + } + + //Descriptions for states "3" to "59" similar. + + description { + state: "60" 0.0; + inherit: "default" 0.0; + image.normal: "0060.png"; + } + } +</code> \ No newline at end of file --