silvana/implot-rs
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Added plot <-> pixel coordinate conversions

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This commit is contained in:
4bb4 2020-11-08 15:17:14 +01:00
parent 4645414624
commit 7c477ec551
3 changed files with 131 additions and 26 deletions
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46
implot-examples/examples-shared/src/line_plots.rs
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@ -4,10 +4,11 @@
use imgui::{im_str, CollapsingHeader, Condition, Ui, Window};
use implot::{
get_plot_limits, get_plot_mouse_position, get_plot_query, is_plot_hovered, is_plot_queried,
push_style_color, push_style_var_f32, push_style_var_i32, set_colormap_from_preset,
set_colormap_from_vec, set_plot_y_axis, AxisFlags, Colormap, ImPlotLimits, ImPlotPoint,
ImPlotRange, ImVec4, Marker, Plot, PlotColorElement, PlotFlags, PlotLine, PlotLocation,
PlotOrientation, PlotUi, StyleVar, YAxisChoice,
pixels_to_plot_vec2, plot_to_pixels_vec2, push_style_color, push_style_var_f32,
push_style_var_i32, set_colormap_from_preset, set_colormap_from_vec, set_plot_y_axis,
AxisFlags, Colormap, ImPlotLimits, ImPlotPoint, ImPlotRange, ImVec2, ImVec4, Marker, Plot,
PlotColorElement, PlotFlags, PlotLine, PlotLocation, PlotOrientation, PlotUi, StyleVar,
YAxisChoice,
};
pub fn show_basic_plot(ui: &Ui, plot_ui: &PlotUi) {
@ -134,7 +135,9 @@ pub fn show_query_features_plot(ui: &Ui, plot_ui: &PlotUi) {
let content_width = ui.window_content_region_width();
// Create some containers for exfiltrating data from the closure below
let mut hover_pos: Option<ImPlotPoint> = None;
let mut hover_pos_plot: Option<ImPlotPoint> = None;
let mut hover_pos_pixels: Option<ImVec2> = None;
let mut hover_pos_from_pixels: Option<ImPlotPoint> = None;
let mut plot_limits: Option<ImPlotLimits> = None;
let mut query_limits: Option<ImPlotLimits> = None;
@ -150,9 +153,20 @@ pub fn show_query_features_plot(ui: &Ui, plot_ui: &PlotUi) {
.with_plot_flags(&(PlotFlags::NONE | PlotFlags::QUERY))
.build(plot_ui, || {
if is_plot_hovered() {
hover_pos = Some(get_plot_mouse_position(None));
hover_pos_plot = Some(get_plot_mouse_position(None));
hover_pos_pixels = Some(plot_to_pixels_vec2(&(hover_pos_plot.unwrap()), None));
}
// Getting the plot position from pixels also works when the plot is not hovered,
// the coordinates are then simply outside the visible range.
hover_pos_from_pixels = Some(pixels_to_plot_vec2(
&ImVec2 {
x: ui.io().mouse_pos[0],
y: ui.io().mouse_pos[1],
},
None,
));
if is_plot_queried() {
query_limits = Some(get_plot_query(None));
}
@ -162,15 +176,33 @@ pub fn show_query_features_plot(ui: &Ui, plot_ui: &PlotUi) {
// Print some previously-exfiltrated info. This is because calling
// things like is_plot_hovered or get_plot_mouse_position() outside
// of an actual Plot is not allowed.
if let Some(pos) = hover_pos {
if let Some(pos) = hover_pos_plot {
ui.text(im_str!("hovered at {}, {}", pos.x, pos.y));
}
if let Some(pixel_position) = hover_pos_pixels {
// Try out converting plot mouse position to pixel position
ui.text(im_str!(
"pixel pos from plot: {}, {}",
pixel_position.x,
pixel_position.y
));
ui.text(im_str!(
"pixel pos from imgui: {}, {}",
ui.io().mouse_pos[0],
ui.io().mouse_pos[1]
));
}
if let Some(limits) = plot_limits {
ui.text(im_str!("Plot limits are {:#?}", limits));
}
if let Some(query) = query_limits {
ui.text(im_str!("Query limits are {:#?}", query));
}
// Try out converting pixel position to plot position
if let Some(pos) = hover_pos_from_pixels {
ui.text(im_str!("plot pos from imgui: {}, {}", pos.x, pos.y,));
}
}
pub fn show_style_plot(ui: &Ui, plot_ui: &PlotUi) {